ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • Articles  (2,659)
  • Wiley  (2,659)
  • American Geophysical Union
  • Cell Press
  • Institute of Physics
  • MDPI Publishing
  • Molecular Diversity Preservation International
  • 2020-2022
  • 2015-2019  (1,339)
  • 2010-2014  (1,320)
  • 1960-1964
  • 1940-1944
  • 2017  (675)
  • 2016  (664)
  • 2012  (662)
  • 2011  (658)
  • 1942
  • Chemical Engineering and Technology  (1,304)
  • 4519
  • Process Engineering, Biotechnology, Nutrition Technology  (2,659)
  • Natural Sciences in General
Collection
  • Articles  (2,659)
Source
Publisher
  • Wiley  (2,659)
  • American Geophysical Union
  • Cell Press
  • Institute of Physics
  • MDPI Publishing
    • +
Years
  • 2020-2022
  • 2015-2019  (1,339)
  • 2010-2014  (1,320)
  • 1960-1964
  • 1940-1944
Year
Journal
Topic
  • 1
    facet.materialart.
    Unknown
    Solubility studies of sodium azide in liquid ammonia by in situ ultrasonic velocity measurement (2017)
    Wiley
    Details
    Publication Date: 2017-03-22
    Description: In this study, ultrasonic velocity measurements were carried out in situ to determine the solubility of NaN 3 in liquid ammonia within the temperature range from 20°C to 110°C. Different mixtures of NaN 3 in ammonia were prepared and the ultrasonic velocities of those mixtures were measured within this temperature range in order to compile calibration curves. Further these calibration curves were used to calculate the solubility in a saturated solution.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 2
    facet.materialart.
    Unknown
    Process Chain for the Fabrication of Nanoparticle Polymer Composites by Laser Ablation Synthesis (2017)
    Wiley
    Details
    Publication Date: 2017-02-10
    Description: Nanoparticle polymer composites are of growing interest due to their unique properties. However, conventional composite synthesis methods usually require several process steps including steps for cleaning and improving the particle-matrix dispersion. As an alternative, laser ablation synthesis can be used to prepare tunable composite materials. This method enables an easy process chain, without the need of additional steps. In this status report, the process chain of laser-based pre-series fabrication of nanocomposites is visualized, and the increase of the methods technology readiness is demonstrated. The process steps are shown from the synthesis of the colloid to applicable functional products. The advantages of using laser ablation for nanocomposite synthesis are highlighted.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 3
    facet.materialart.
    Unknown
    Numerical analysis of cohesive particle flow in circulating fluidized bed using population balance equation (2017)
    Wiley
    Details
    Publication Date: 2017-02-10
    Description: A novel model coupling with population balance equation is adopted for simulating the aggregation process and flow behavior of cohesive powders in full loop circulating fluidized bed. The agglomerate diameter is calculated according to the change of particle number by population balance equation which is solved as a part of computational fluid dynamics simulation. The solid pressure and viscosity are redefined by taking the effect of inter-particle force into consideration based on kinetic theory of granular flow. Simulation results of time-averaged solid volume fraction and diameter of agglomerate are predicted by numerical method and are in reasonable agreement with experimental data. The variation of mass flux, solid pressure and viscosity under different operating conditions are observed and analyzed on the basis of new model.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 4
    facet.materialart.
    Unknown
    Development and application of a microwave reactor radiating through a leaky coaxial antenna (2017)
    Wiley
    Details
    Publication Date: 2017-03-07
    Description: A novel microwave (MW) reactor radiating through a leaky coaxial antenna with an impedance matching unit was developed in this study. The MW energy could effectively transmit from the power source to the reactor with a uniform distribution of electromagnetic field. Simulations of the MWs radiating indicated the excellent radiation capacity of electromagnetic waves and a uniform axial extended cylinder MW field around the antenna. The simulation result was in accordance with the antenna efficiency measurements and the temperature distribution. The model reactions of the preparations of benzoyl hydrazine performed in an open-vessel at atmospheric pressure and the preparation of 3-acetylcoumarin in a sealed reactor under pressure proceeded smoothly on a scale of hundreds of grams.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 5
    facet.materialart.
    Unknown
    Mass transfer characteristics in a rotor-stator reactor (2017)
    Wiley
    Details
    Publication Date: 2017-03-07
    Description: This study investigated mass transfer characteristics in a rotor-stator reactor (RSR) in terms of the overall volumetric mass-transfer coefficient ( K x a ) using the N 2 -H 2 O-O 2 system. The effect of various operating parameters including rotation speed, liquid volumetric flow rate and gas volumetric flow rate on K x a were systematically examined, and a gas-liquid mass transfer model was established to predict K x a . Results reveal that K x a increased with an increase in rotation speed, liquid volumetric flow rate and gas volumetric flow rate. The results also confirm that the predicted values of K x a were in agreement with the experimental values with deviation within 15%. The results herein can be used to provide better understanding of mass transfer characteristics in RSR.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 6
    facet.materialart.
    Unknown
    Converting Alkali Lignin to Biofuels over NiO/HZSM-5 Catalysts Using a Two-stage Reactor (2017)
    Wiley
    Details
    Publication Date: 2017-03-07
    Description: A series of NiO/HZSM-5 catalysts were used to convert alkali lignin to hydrocarbon biofuels in a two-stage catalytic pyrolysis system. The results indicated that all NiO/HZSM-5 catalysts reduced the content of undesirable phenols, furans and alcohols of biofuel compared to non-catalytic treatments. The 1.27% NiO/HZSM-5 catalyst generated the highest biofuel yield at 27.5% in all catalytic treatments, and it also produced biofuel with the highest content of hydrocarbons at 69.4%. The emission of carbon dioxides (CO and CO 2 ) increased in higher NiO loading HZSM-5 treatments (7.64% and 15.27%) due to the redox reaction between NiO and the oxygenated compounds in the bio-oil. Ni 2 SiO 4 formed in the used NiO/HZSM-5 catalysts during the high temperature pyrolysis process.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 7
    facet.materialart.
    Unknown
    Editorial Board: Chem. Eng. Technol. 9/2017 (2017)
    Wiley
    Details
    Publication Date: 2017-08-25
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 8
    facet.materialart.
    Unknown
    Overview Contents: Chem. Eng. Technol. 9/2017 (2017)
    Wiley
    Details
    Publication Date: 2017-08-25
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 9
    facet.materialart.
    Unknown
    Local Mass Transfer Phenomena and Chemical Selectivity of Gas-Liquid Reactions in Capillaries (2017)
    Wiley
    Details
    Publication Date: 2017-08-25
    Description: Gas-liquid reactions in microreactors play an important role in scientific research and industry. Enhancing heat and mass transfer allows overcoming mass transfer limitations in gas-liquid reactions. Mass transfer can be further increased by employing helically coiled capillaries, which induce Dean vortices and improve radial mixing. In this work, a colorimetric technique is proposed for gas-liquid reactions in straight and helically coiled capillaries in order to visualize local mass transfer phenomena and concentration distributions. This method is based on the consecutive oxidation of leuco-indigo carmine and enables non-invasive investigation of mass transfer and chemical selectivity in microchannels with high temporal and spatial resolution.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 10
    facet.materialart.
    Unknown
    Highlights: Chem. Eng. Technol. 9/2017 (2017)
    Wiley
    Details
    Publication Date: 2017-08-25
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 11
    facet.materialart.
    Unknown
    Cover Picture: Chem. Eng. Technol. 9/2017 (2017)
    Wiley
    Details
    Publication Date: 2017-08-25
    Description: Image of multicolored broken glass. Copyright: riccardo livorni@ Shutterstock
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 12
    facet.materialart.
    Unknown
    Overview Contents: Chemie Ingenieur Technik 9/2017 (2017)
    Wiley
    Details
    Publication Date: 2017-08-25
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 13
    facet.materialart.
    Unknown
    Particle and Powder Technology – Industry Meets Science at PARTEC (2017)
    Wiley
    Details
    Publication Date: 2017-08-25
    Description: No abstract.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 14
    facet.materialart.
    Unknown
    Reaction Engineering for Continuous Production of Silver Nanoparticles (2017)
    Wiley
    Details
    Publication Date: 2017-08-29
    Description: A scalable process for the production of Ag nanoparticles that gives complete conversion of the limiting reactant is analyzed in detail. The kinetics of silver nanoparticle synthesis using citrate reduction are investigated and used for development of a reaction engineering model to facilitate the reactor design. The effect of temperature, pH, concentration and mixing (axial dispersion) on the rates of nucleation and growth are analyzed quantitatively. An approach that considers reaction kinetics coupled with quality of dispersion is developed for reactor design as well as selection of reactor configurations for the synthesis of specific particle sizes. The developed approach has been used for continuous production of 10 L suspension Ag nanoparticles with very narrow particle size distribution.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 15
    facet.materialart.
    Unknown
    Rotor-stator spinning disc reactor: characterization of the single-phase stator-side heat transfer (2017)
    Wiley
    Details
    Publication Date: 2017-09-16
    Description: The single-phase fluid-stator heat transfer in a rotor-stator spinning disc reactor in dependence on rotational Reynolds number, dimensionless throughput, Prandtl number and aspect ratio is examined. For a parameter range of Re ω = 1.1 · 10 4 - 2.7 · 10 6 , C W = 60 - 450, Pr = 4 - 14 and the two aspect ratios G = 0.0074 and 0.0154, an increase in the stator-side Nusselt number with increasing Reynolds number, Prandtl number and a higher throughput is found. Laminar and turbulent flow regions are observed, which coincide with a throughput- and a rotation-governed heat transfer regime, respectively. A Nusselt correlation to predict the experimental data in the turbulent flow regime within 20 % accuracy was established. An increase in the overall volumetric heat transfer coefficient from 1.27 MW m -3 K -1 to 2.16 MW m -3 K -1 for a rise in Reynolds number from 2.71 · 10 4 to 4.25 · 10 5 was observed, being considerably higher compared to conventional tube reactors and twice as large in contrast with a similar rotor-stator setup.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 16
    facet.materialart.
    Unknown
    Transfer Functions for Periodic Reactor Operation: Fundamental Methodology for Simple Reaction Networks (2017)
    Wiley
    Details
    Publication Date: 2017-08-18
    Description: The contribution presents a method for frequency response analysis of chemical reactors with periodically modulated inlet concentration. The method is demonstrated for simple first-order irreversible consecutive and parallel as well as reversible reactions applying an isothermal continuous stirred tank reactor (CSTR). The frequency response of these reaction types is studied by simulations in time and frequency domain, being the latter based on Laplace transformation of the material balance. The results allow to clearly distinguish between the quasi and relaxed steady-state as well as the full transient region with impact on designing reactors for dynamic operation. Furthermore, the relation between the dynamic response and the time constants of the system is discussed.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 17
    facet.materialart.
    Unknown
    Thermochemical biomass conversion for decentralized power generation with Inverse Brayton Cycle (2017)
    Wiley
    Details
    Publication Date: 2017-08-18
    Description: Biomass is a meaningful energy source for the decentralized power generation. The combination of a 2-stage thermochemical conversion unit with an Inverse Brayton Cycle (IBC) is subject to present research activities. Several advantages are expected compared to commercial available concepts. A commercially proven turbocharger from the automotive industry is used for the IBC unit. No cost-intensive gas cleaning is required due to an almost dust and tar free biomass conversion. The influence of feedstock characteristics on the thermochemical conversion, emissions and overall plant performance is subject to process optimization studies. Furthermore validation of the concept is target of a demonstration phase which is planned at later stage of the research activities.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 18
    facet.materialart.
    Unknown
    Esterification of Palm Fatty Acid Distillate using Sulphonated Mesoporous CuO-ZnO Mixed Metal Oxides Catalyst (2017)
    Wiley
    Details
    Publication Date: 2017-08-19
    Description: A nano-crystalline mesoporous CuO-ZnO hollow sphere was successfully fabricated through the hydrothermal method. The nanocomposite was formed in the presence of polyethylene glycol (PEG) as a dispersant and D-glucose as a template. The mesoporous CuO-ZnO catalyst was further functionalised with benzene-sulphonic acid to catalyze the esterification of palm fatty acid distillate (PFAD). The thermal gravimetric analysis (TGA), X-ray diffraction (XRD), Brunauer Emmet and Teller (BET), ammonia temperature programmed desorption (NH 3 -TPD), fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (FE-SEM), and transmission electron microscopy (TEM) studies were undertaken to evaluate the physicochemical, textural, structural, and thermal properties of the mesoporous CuO/ZnO mixed oxide catalysts. The modified mesoporous catalyst possessed unique textural properties with the specific surface area of 459.33 m 2 g – 1 , average pore diameter of 2.73 nm, total specific pore volume of 0.33 cm 3 g – 1 , and total acid density of 2.35 mmolg – 1 . The mixed metal oxide with the Cu:Zn atomic ratio of 1.0 exhibited the best catalytic activity through the esterification of the PFAD with the FAME yield of 96.14%. The highest yield was achieved under optimum reaction conditions with the methanol to oil molar ratio of 9:1, catalyst concentration of 1.5 wt.%, reaction temperature of 90°C, and reaction time of 90 min.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 19
    facet.materialart.
    Unknown
    Rapid degradation of Rhodamine B via a poly (dopamine) modified membrane decorated with Ag nanoparticles (2017)
    Wiley
    Details
    Publication Date: 2017-08-26
    Description: Rapid and convenient removal of organic dye from water still remains a great challenge. The study reports the rapid degradation of Rhodamine B (RhB) with NaBH 4 as a reducing agent catalyzed by a catalytic membrane fabricated by poly (dopamine) modified PVDF powders and silver nanoparticles (NPs). Results indicate that the catalytic membrane shows an excellent performance for RhB degradation under a static state and cross-flow catalysis. Compared to the static catalysis, cross-flow catalysis can efficiently enhance the degradation of RhB due to the silver NPs and the high flowing rate of reactants on the membrane surface. The penetrated fluid can be directly excluded due to the RhB with a high conversion coming out from the membrane pores with silver NPs. The convenient operation avoids the additional steps to separate catalysts from the system, and therefore has good prospect in degradation of organic dye.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 20
    facet.materialart.
    Unknown
    Efficient Control of Microbubble Properties by Alcohol Shear Flows in Ceramic Membrane Channels (2017)
    Wiley
    Details
    Publication Date: 2017-09-16
    Description: The efficient control of microbubbles is achieved by using the alcohol shear flows in ceramic membrane channels. The dependence of hydrodynamic and mass transfer properties of microbubbles on liquid viscosity is investigated in a bubble column with 32 mm i.d. and 800 mm height. The multi-channel ceramic membrane with an average pore size of 200 nm works as the gas sparger, and the shear flow on the membrane surface controls the microbubble generation. Oxygen gas and glycerin solutions with different viscosities (μ l = 1 - 42 mPa·s) are used as gas phase and liquid phase, respectively. The microbubbles are massively generated at different liquid viscosities. With increasing viscosity, the bubble size first decreases (μ l 〈 2.0 mPa·s) and then increases. The dual effect of viscosity on bubble size is related to bubble coalescence. In low viscosity range, increasing viscosity hinders liquid film drainage and thus inhibits coalescence. At high viscosity, liquid turbulence intensity is weakened and bubble coalescence is enhanced. However, the dual effect of viscosity on gas holdup is not observed for microbubble. Increasing viscosity makes the monotonic increase in Sauter diameter and specific interfacial area, while the mass transfer coefficient decreases as viscosity increases at small cross flow velocities.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 21
    facet.materialart.
    Unknown
    Capturing CO2 by Using a Micro-algae Culture Recycle Solution (2017)
    Wiley
    Details
    Publication Date: 2017-09-19
    Description: In this study, capture of CO 2 by using a micro-algae culture solution was explored in a continuous bubble-column scrubber under a constant pH environment. The aim of this work was to search for the optimum conditions for a pilot-scale study. With the Taguchi method, a total of L 16 (4 4 ) = 16 runs were required. The absorption rate (R A ), absorption efficiency (E), overall mass-transfer coefficient (K G a) and gas-liquid flow rate ratio (γ) were determined by using a material balance, as well as a two-film model in a steady-state condition. From the signal/noise (S/N) ratio, the sequence of parameters showed that C(Q g )〉A(pH)〉B(T)〉D(C L ). In addition, the optimum results for E, R A , K G a and γ were all satisfied. Uncontrolled experiments were also carried out. Empirical equations were also discussed.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 22
    facet.materialart.
    Unknown
    Reaction Calorimetry for Exothermic Reactions in Plate-Type Microreactors Using Seebeck Elements (2017)
    Wiley
    Details
    Publication Date: 2017-08-26
    Description: A flexible reactor and measurement set-up to safely obtain thermokinetic data for exothermic chemical reactions in plate-type microreactors is presented in this work. Precise heat flux measurement is realized by means of Seebeck elements and allows for direct as well as space and time resolved heat flux measurement across the reactor. The microreactor used in this work is manufactured from polyvinylidene fluoride foils and consists of 11 SZ-shaped mixing channel elements. The Seebeck elements are calibrated by Joule effect, while its performance is shown in heat transfer and neutralization reaction experiments. Furthermore, the local resolution enables an estimation of mixing time scale for rapid reactions. A comparison of obtained results indicates good accordance with literature data and is the base of further investigations using the calorimeter.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 23
    facet.materialart.
    Unknown
    Comparing the dynamic flow properties and compaction properties of pharmaceutical powder mixtures (2017)
    Wiley
    Details
    Publication Date: 2017-09-22
    Description: The dynamic flow properties and compaction characteristics of mannitol and mannitol-sodium carbonate mixtures (80/20, 70/30 and 60/40 by mass) were measured using a Freeman FT4 powder rheometer. The results showed that the mixtures containing up to 30% sodium carbonate had better flow properties and improved compaction characteristics when compared with mannitol alone. The mixtures were also analysed using a shear cell, which gave flow functions that varied little between the samples.The study demonstrated the feasibility of combining a more expensive pharmaceutical excipient with a cheaper ingredient, without compromising desired powder characteristics. It may also provide a useful method for assessing the suitability of new formulations for use as direct compression bases, as part of a wider range of powder flow tests.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 24
    facet.materialart.
    Unknown
    Online Flooding Supervision in Packed Towers: an Integrated Data-Driven Statistical Monitoring Method (2017)
    Wiley
    Details
    Publication Date: 2017-09-22
    Description: Development of simple and efficient monitoring methods for flooding supervision is an important but difficult task for the safe operation of packed towers. A data-driven online flooding monitoring method named Bayesian integrated dynamic principal component analysis (IDPCA) is developed. In the first step of IDPCA, using the fuzzy c-means clustering method, the multivariate samples collected during plant operation are first classified into several groups. Then, in each subset a dynamic principal component analysis (DPCA) model is constructed to extract the process characteristics. To improve the monitoring performance, Bayesian inference is utilized to combine these DPCA models in a suitable manner. Consequently, the control limits are formulated using the probabilistic analysis. The superiority of IDPCA is illustrated using a lab-scale packed tower through the comparison with the conventional principal component analysis (PCA) and DPCA methods.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 25
    facet.materialart.
    Unknown
    Preparation and the anti-coke properties of acid-treated bentonite-supported Ni-B catalyst (2017)
    Wiley
    Details
    Publication Date: 2017-09-22
    Description: Boron (B) was introduced into the Ni/acid treated bentonite (Ni/A-Bn) catalysts to improve the anti-coking ability of nickel-based catalyst in the hydrogenation of nitrobenzene. The results showed the optimal B amount was 0.75 wt% on the Ni/A-Bn, which was more active than the catalyst without B. During a 105-hour reaction, Ni-B/acid treated bentonite (Ni-B/A-Bn) obtained a high nitrobenzene conversion (〉99%) and a high aniline selectivity. The lifetime of Ni-B/A-Bn with B amount of 0.75 wt% extended 45 h compared to the Ni/A-Bn. The addition of B into Ni/A-Bn decreased the NiO particle size, improved the dispersion of the active components, and decreased the carbon deposition. The combination of B and Ni prevented the coke on the metallic Ni in the nitrobenzene hydrogenation, reducing the carbon deposition on the surface of Ni-B/A-Bn.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 26
    facet.materialart.
    Unknown
    Continuous waste cooking oil transesterification accelerated by microwave heating and adding strontium oxide as the catalyst (2017)
    Wiley
    Details
    Publication Date: 2017-09-16
    Description: Biodiesel produced from waste cooking oils (WCOs) mixed with methanol was efficiently transesterified using a continuous-fluid-flow system with a focused microwave heating device. Strontium oxide (SrO) was added as the catalyst. The factors that most affect the biodiesel conversion rate were first estimated by considering the effects of the oil:methanol ratio (1:6), added quantity of SrO (3 wt%), and microwave heating power (500 W) on reaction time in a built-in batch unit. The optimal parameter values were then applied to a continuous-fluid-flow system, which simulates the conversion of a scaled-up quantity of WCOs into biodiesel. Under a fluid flow velocity of 160 mL/min and an appropriate output temperature, a biodiesel conversion rate of ca. 93% was reached. The conversion of WCOs into biodiesel and the reaction rate are based on the transesterification reaction, which is associated with the decomposition of ester bonds and the formation of a tetrahedral intermediate substance.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 27
    facet.materialart.
    Unknown
    Surface modification of polysulfone membrane using poly(acrylic acid)-decorated alumina nanoparticles (2017)
    Wiley
    Details
    Publication Date: 2017-09-19
    Description: Alumina nanoparticles were decorated by poly(acrylic acid) (PAA) as a hydrophilic polymer through a thermal polymerization of acrylic acid in the presence of alumina nanoparticles. The obtained PAA-decorated alumina (PAA-d-Al) nanoparticles were embedded into the polysulfone membrane matrix via nanofiller dispersion in the casting solution. The prepared membranes were characterized by porosity and water contact angle measurements, scanning electron and atomic force microscopy as well as fouling tests using whey proteins. According to the results, the presence of nanoparticles had significant effect on the membrane hydrophilicity and surface softness resulting in fouling mitigation and flux recovery enhancement compared with the virgin polysulfone membrane. Moreover, the prepared membrane embedded with 0.25 wt.% of PAA-d-Al nanofillers showed a remarkable durability and reusability during the filtration tests.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 28
    facet.materialart.
    Unknown
    Low-cost Noninvasive Real-time Imaging for Tubular Continuous-flow Crystallization (2017)
    Wiley
    Details
    Publication Date: 2017-09-19
    Description: A key design limitation to the effective monitoring and control of continuous crystallization processes is the ability to characterize crystals in real time. This article describes a low-cost system, composed of a basic stereomicroscope and video camera, for the in-situ imaging of sub-millimeter crystals through curved walls of millifluidic tubular crystallizers. Real-time videos taken for millimeter-size slurry slugs are used to guide the experimental design for a recently developed multiphase-flow crystallization process, including the improvement of the slug aspect ratio, visualization of crystal shapes, and observation of the extent of aggregation. Design considerations are also discussed for the use of multiple stereomicroscopes in other continuous-flow tubular experiments.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 29
    facet.materialart.
    Unknown
    Natural-Calcium Based Residues for Carbon Dioxide Capture in Bubbling Fluidized Bed Reactor (2017)
    Wiley
    Details
    Publication Date: 2017-09-22
    Description: The used clamshells ( Paphia undulata ) as a precursor of calcium oxide (CaO) sorbents were firstly employed for carbon dioxide (CO 2 ) adsorption in a bubbling fluidized bed reactor. To find the optimal calcination conditions, a 2 k experimental design was used for varying the ground clamshell particle size, heating rate and duration time at 950°C under a nitrogen atmosphere. The heating rate was the most significant factors affecting the CO 2 adsorption capacity of the obtained CaO sorbent. In particular, the most suitable conditions for calcination were a clamshell particle size of 250–425 µm, a heating rate of 10°C min -1 up to 950°C and 15 min of isothermal step at 950°C before cooling down. The maximum CO 2 adsorption capacity of the CaO obtained under these conditions was 31.1 mg CO 2 g CaO -1 , which was higher than that of a commercial CaO.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 30
    facet.materialart.
    Unknown
    Phase Behavior of Ethylene-co-Vinyl Acetate and Alkyl Acrylate Copolymer in High-Pressure Dimethyl Ether (2017)
    Wiley
    Details
    Publication Date: 2017-09-23
    Description: The phase behavior data are presented for three kinds of commercial polymer-bonded explosive (PBX) elastomers in dimethyl ether (DME). Ethylene- co -vinyl acetate (EVA40 with the vinyl acetate content of 40 mass % and EVA60 with the vinyl acetate content of 60 mass %) and alkyl acrylate copolymer (ACM) were used as the PBX elastomers. For each elastomer + DME system, the cloud and/or bubble point (phase boundaries) pressures were measured as a function of temperature and elastomer composition using a high-pressure phase equilibrium apparatus equipped with a variable-volume view cell. All the elastomers studied in this work exhibited a lower critical solution temperature (LCST) phase behavior in the DME solvent. EVA40 showed the cloud point behavior at temperatures of 333 K to 353 K and at pressures of 4 to 14 MPa, whereas EVA60 showed both the bubble and cloud points at temperatures of 303 K to 343 K and at pressures under 8 MPa. For the EVA40 + DME system, a maximum cloud point pressure was observed around at about 2 mass % EVA40 composition. For the EVA60 + DME system, the cloud point pressure increased as the EVA60 composition increased. The experimental data for the ACM + DME system showed that the ACM elastomer was readily soluble in DME of saturated liquid state at most temperature and elastomer composition ranges.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 31
    facet.materialart.
    Unknown
    Optimization of a micromixer with two-layer serpentine crossing channels at multiple Reynolds numbers (2017)
    Wiley
    Details
    Publication Date: 2017-09-23
    Description: In this study, multi-objective optimizations of a micromixer with two-layer serpentine crossing channels were performed at two different Reynolds numbers by using a multi-objective genetic algorithm and surrogate modeling based on a Navier–Stokes analysis. The optimizations included three dimensionless design variables, namely ratios of the diagonal channel width to the pitch length, the main channel width to the pitch length, and the channel depth to the pitch length. Design space was confirmed through a parametric study, and the Latin hypercube sampling technique was used to select design points within the design space. The following three pairs of objective functions were used for the optimizations: mixing index at Re = 0.2 vs. pressure drop at Re = 0.2, mixing index at Re = 40 vs. pressure drop at Re = 40, and mixing index at Re = 0.2 vs. mixing index at Re = 40. The Kriging meta-model was used for surrogate modeling of the objective functions. Concave Pareto-optimal fronts representing the trade-offs between the objective functions were obtained through the optimizations. The optimizations provided designs that improved the mixing index by 7.4% and 13.9% and reduced the pressure drop by 35.2% and 14.7% at Reynolds numbers, 0.2 and 40, respectively, when compared to those of a reference design.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 32
    facet.materialart.
    Unknown
    Dynamic Change in Color Filter Layer in Baking Process by Multi-Speckle Diffusing Wave Spectroscopy (2017)
    Wiley
    Details
    Publication Date: 2017-09-23
    Description: Undercut defects of color filter (CF) layers, which inevitably occur in UV curing and development processes for liquid crystal displays and white organic light emitting diodes, should be elucidated to ensure product quality and processability. In this study, the dynamic changes of the Green CF layer are investigated during the baking process by examining the motion of pigment particles within the thin CF layer via multi-speckle diffusing wave spectroscopy (MSDWS). Autocorrelation functions and characteristic times for the α-relaxation, which are determined using light intensities scattered from the CF layer, directly indicate thermal melting and curing stages in the process. It is confirmed that MSDWS is a reliable non-contact measurement tool for quantitatively analyzing the initial change of the CF layer during the baking process.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 33
    facet.materialart.
    Unknown
    Simultaneous sodium hydroxide production by membrane electrolysis and carbon dioxide capture (2017)
    Wiley
    Details
    Publication Date: 2017-09-23
    Description: The simultaneous process of NaOH production via electrolysis of NaCl and CO 2 capture was investigated due to the expectation of the reduction in capital cost. It was revealed that seawater concentration (35 g L -1 ) of NaCl solution was adaptable to be used as both anolyte and catholyte and 90°C was the most proper temperature for NaOH production among the test conditions in this work. Under the electrolyte and temperature conditions, the simultaneous NaOH production and CO 2 capture processes were conducted and more than 98.83 % of OH - was reacted with CO 2 to yield aqueous carbonate solutions. Additional electrochemical CO 2 capture tests was carried out depending on the different CO 2 concentration of mixed gases.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 34
    facet.materialart.
    Unknown
    A Novel Approach for Measuring Gas Solubility in Liquids Using a Tube-in-Tube Membrane Contactor (2017)
    Wiley
    Details
    Publication Date: 2017-08-17
    Description: Data on oxygen solubility in organic solvents are essential for catalyst evaluation, reactor design, and process safety of catalytic aerobic oxidations which is an emerging area in green chemistry. A novel approach using a Teflon AF-2400 tube-in-tube membrane contactor was developed for the measurement of gas solubility in organic solvents. The semi-permeable Teflon AF-2400 membrane ensures gas saturation of liquids in continuous-flow at specific pressure and temperature. After liquid decompression, the amount of gas outgassed was measured with a bubble meter and used for solubility calculation. In this study, this approach was demonstrated for the measurement of oxygen solubility in toluene and benzyl alcohol. Validation experiments were initially performed by comparing the obtained oxygen solubility in toluene with literature data. Then, oxygen solubility in benzyl alcohol was measured at pressures up to 10 bar and temperatures 298 – 393 K. Oxygen solubility in benzyl alcohol at 298 K (Henry's law constant, 3462 bar) was observed to be ~1/3 of that in toluene (1057 bar). With increasing temperature, the solubility of oxygen in benzyl alcohol was found to increase, indicating that the oxygen-dissolving process is endothermic. Finally, an empirical correlation of the Henry's law constant as a function of temperature was determined.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 35
    facet.materialart.
    Unknown
    Continuous Hydrogenation of L-Arabinose and D-Galactose in a Mini Packed Bed Reactor (2017)
    Wiley
    Details
    Publication Date: 2017-08-18
    Description: The continuous hydrogenation of a mixture of L-arabinose and D-galactose over a Ru/C catalyst was investigated in a miniaturized packed bed reactor. The reaction is one important step of the transformation process of the naturally occurring hemicellulose arabinogalactan (AG) into valuable sugar alcohols. Process intensification was accomplished by reducing the reactor dimensions to a few millimeters, thus leading to better mass and heat transfer performance. The effect of temperature, pressure and liquid flow rate on the yield as well as byproduct formation will be discussed. Based on a kinetic model derived from batch experiments, a model of the continuous reactor was developed and used for scale-up purposes.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 36
    facet.materialart.
    Unknown
    Shell of Planet Earth – Global Batch Bioreactor (2017)
    Wiley
    Details
    Publication Date: 2017-08-22
    Description: Planet Earth, precisely speaking its surface shell, might be considered as a huge, multiphase, batch, biochemical reactor heated by the Sun, whose energy is a unique resource. The Sun ensures our earthly life unconditionally; moreover, it compensates the heat losses of the land, water and ice by radiation emitted from the Earth surface to its surrounding space at night. It is evident that in this macro-reactor the complex transport phenomena occurs in many phases; involving mass, heat and momentum. Obviously such a responsive batch system is strongly limited by raw resources of all elements including carbon materials necessary for good living standard and utilized both in the energy production and for industrial main chemical processes.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 37
    facet.materialart.
    Unknown
    An Investigation of Blockage Conditions on the Laminated-sheet Microchannel Reactor (2017)
    Wiley
    Details
    Publication Date: 2017-08-24
    Description: Microchannel reactor is generally an adopted laminated-sheet structure, in which several microchannel sheets with the same or different structures are laminated together and tightened by welding or other connection methods into a single reaction unit. Uniform velocity distribution among microchannels can improve heat and mass transfer efficiency. When one or more microchannels are blocked, the uniformity of velocity distribution is inevitably affected. In this work, velocity distributions among microchannels in a single-sheet and double-sheet laminated structure under different blockage conditions are investigated. As expected, the velocity values of other microchannels increase when one or more microchannels are blocked. The increase in the magnitude of the velocity is relatively large when there are more blocked microchannels, or near the blocked microchannel, or a small distance from two blocked microchannels. The velocity distribution is symmetrical when two blocked microchannels or two different sheets are centrally symmetrical. A blocked location within a microchannel shows similar effect on the velocity distribution. In the double-sheet laminated structure, a sheet with blockage shows similar effects on the velocity distribution of the other sheet, with or without a blockage. Whether a single-sheet structure or a double-sheet laminated structure is utilized, a more uniform velocity distribution can be achieved when the blocked microchannel is closer to the middle. The sheet without a blockage presents a more uniform velocity distribution in a double-sheet laminated structure. An increase in the number of blocked microchannels results in less uniformity in the velocity distribution. The number of laminated sheets shows little effect on the uniformity of the velocity distribution among microchannels with blockage.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 38
    facet.materialart.
    Unknown
    Overview Contents: Chemie Ingenieur Technik 3/2017 (2017)
    Wiley
    Details
    Publication Date: 2017-02-24
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 39
    facet.materialart.
    Unknown
    Editorial Board: Chem. Eng. Technol. 3/2017 (2017)
    Wiley
    Details
    Publication Date: 2017-02-24
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 40
    facet.materialart.
    Unknown
    Innovative Carbon Dioxide-Capturing Organic Solvent: Reaction Mechanism and Kinetics (2017)
    Wiley
    Details
    Publication Date: 2017-03-03
    Description: The reaction rates of CO 2 with an innovative CO 2 -capturing organic solvent (CO 2 COS), consisting of blends of 2- tert -butyl-1,1,3,3-tetramethylguanidine (BTMG) and 1-propanol, were obtained as function of BTMG concentration and temperature. A stopped-flow apparatus with conductivity detection was used. The reaction was modeled by means of a modified termolecular reaction mechanism which resulted in a second-order rate constant, and activation energies were calculated for a defined temperature range. Quantum chemical calculations at the B3LYP/6-31G(d) level also produced the activation energy of this reaction system which strongly supports the experimental findings. The suitability of an innovative CO 2 -capturing organic solvent regarding the associated reaction kinetics was investigated. The reaction was modeled by a modified termolecular reaction mechanism. The proposed system exhibits faster reaction kinetics than the widely used aqueous alkanolamine systems. No additional rate enhancers and potentially less heat for regeneration are required.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 41
    facet.materialart.
    Unknown
    A probabilistic-statistical model of particle classification process in small sizes hydrocyclones-classifiers (2017)
    Wiley
    Details
    Publication Date: 2017-03-05
    Description: An analytical model of particle classification process of "liquid-solid" polydisperse systems in cylinder-conic hydrocyclones-classifiers of small sizes has been developed. The applicability of probability and statistical calculation method using diffusion-type equations, and in particular the Fokker-Planck-Kolmogorov equation, is theoretically shown.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 42
    facet.materialart.
    Unknown
    Biodiesel production from waste frying oil by ultrasound-assisted transesterification (2017)
    Wiley
    Details
    Publication Date: 2017-06-03
    Description: This paper analyses the production of biodiesel by ultrasound-assisted transesterification of waste frying oil. The reaction was carried out with methanol and sodium hydroxide was used as a catalyst. The reaction was carried out at methanol to oil molar ratio of 6:1, catalyst concentration as 0.5 wt.%, a range of temperature from 30–50 °C and reaction time from 30–90 min. Produced biodiesel by this method was analysed for fatty acid methyl esters composition, density, moisture and volatile matter content, acid value, saponification value, iodine value, distillation curves and cetane number.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 43
    facet.materialart.
    Unknown
    Pilot plant scale hydrogen production from bioethanol: COPROX catalyst behavior (2017)
    Wiley
    Details
    Publication Date: 2017-06-03
    Description: Hydrogen is recognized as a promising green energy source, particularly when used to feed a PEMFC (polymer electrolyte membrane fuel cell). In this work, it was obtained by bioethanol steam reforming with CO and CO 2 as primary sub products. Since cell anode is extremely sensitive to poisoning with CO, WGS (water gas shift) and COPROX (carbon oxide preferential oxidation) reactors are employed for hydrogen purification. Catalysts prepared by our lab were tested at pilot plant scale in both the reformer and COPROX, where different active phase distributions, stoichometric excess of air and reaction temperatures were tested. The use of two different COPROX units with intermediate air injection was also considered. Catalysts prepared showed good stability and performance.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 44
    facet.materialart.
    Unknown
    Kinetics of adsorption/desorption of CO2 on/off Polyethyleneimine – mesoporous silica (2017)
    Wiley
    Details
    Publication Date: 2017-06-08
    Description: The kinetics of adsorption of CO 2 on solid sorbents based on polyethyleneimine/mesoporous silica (PEI/MPS) was studied by following the mass gain during CO 2 flow. The desorption kinetics was also investigated. A linear (PEI-423) and a branched (PEI-10k), both with similar nitrogen contents, were chosen for this study. The solid sorbents were synthesized by impregnating the PEI materials into MPS foam. The kinetics of adsorption was fitted with a double exponential model in which the first exponential component describing the surface adsorption and the second one for the diffusion of CO 2 into the silica pores. On the other hand, the desorption process obeyed a simple first order kinetics. The activation energy of desorption off PEI-423 was lower than that of PEI-10k, presumably, because the first imine is linear but the latter is branched, thus needed more energy to have its nitrogen well exposed to CO 2 . In an attempt to increase the CO 2 sorption capacity, the MPS was first treated by non-ionic surfactant materials prior to impregnation with PEI. The surfactants treatment enhanced the CO 2 sorpitivity by ~ 10% due to accelerating the kinetics of surface adsorption; revealing that the surfactant assisted the dispersion of the PEI onto the MPS surface. The surfactant effect was not only limited to improving the sorption capacity, but also lowered both the maximum sorption temperature and the desorption activation energies.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 45
    facet.materialart.
    Unknown
    On the emulation of bubble-induced turbulence using randomly moving particles in a grid structure (2017)
    Wiley
    Details
    Publication Date: 2017-06-13
    Description: An approach to generate turbulence, with systematically controllable properties and statistically comparable to real bubble induced turbulence is presented and evaluated. This method uses particles arranged in a flexible regular grid. Those grids are supposed to emulate the wake structure as well as the stochastically movement of a bubble swarm when a flow passes through the grid. In contrast to other comparable grid concepts [28], the particles can move freely in the directions perpendicular to the flow direction. Particle image velocimetry (PIV) and electrodiffusion measurement technique (EDM) were used to characterize the flow induced by different grid configurations. With these techniques spatially resolved velocity fields and time-resolved energy spectra are obtained. It is shown that homogeneous turbulence with intensity comparable to regular bubble flow is obtained about ~4 sphere diameters downstream from the particle grid. Furthermore, it is demonstrated that the energy spectra of these emulated turbulent flows agree with the energy spectra of real bubble induced turbulence. Consequently, the concept of turbulence generation analyzed here will be useful for detailed scientific investigations of bubbles in turbulent flows using sophisticated optical measurement techniques.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 46
    facet.materialart.
    Unknown
    Thermodynamic Properties of Ionic Semiclathrate Hydrate Formed with Tetrabutylammonium Propionate (2017)
    Wiley
    Details
    Publication Date: 2017-06-13
    Description: This paper reports the phase equilibrium temperature and dissociation heat of tetrabutylammonium propionate (TBAPr) hydrate. TBAPr hydrate is a type of ionic semiclathrate hydrates and also could potentially be used as thermal energy storage materials. The temperature – composition phase diagram of the TBAPr hydrate was determined in the mass fraction from 0.05 to 0.43. The highest equilibrium temperature of TBAPr hydrate was 17.5 °C in the mass fraction range from 0.33 to 0.38. On the dissociation heat of DSC measurements, multiple peaks of heat flow were observed on TBAPr – water system at the TBAPr mass fraction lower than 0.35, and there was a single peak at the mass fraction higher than 0.37. The largest dissociation heat was 203 kJ/kg at the mass fraction 0.38.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 47
    facet.materialart.
    Unknown
    Development of a model for water scrubbing based biogas upgrading and biomethane compression (2017)
    Wiley
    Details
    Publication Date: 2017-06-13
    Description: Biomethane is a renewable energy source that is applicable in all of the sectors: electricity, heat and transport. It is an easily storable fuel that can be used wherever natural gas is used. Biomethane is mostly obtained from Biogas by different upgrading technologies. At present, the most common technology is the water scrubbing because of its reliability and simplicity. In this paper, a methodology for designing as well as for evaluating and optimizing water scrubbing plants including biomethane compression is introduced. To show how the methodology can be applied, a zero-emissions water-scrubbing-process characterized with under-pressure regeneration of washing water is modeled and investigated by a sensitivity analysis. The results show that the lowest power consumption is achieved at the absorption pressure of 6 bar and the regeneration pressure of 0.25 bar, while the low-pressure absorption at 1.5 bar requires a considerably larger packed bed volume in comparison to that at higher pressures.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 48
    facet.materialart.
    Unknown
    Length to Diameter Ratio of Extrudates in Catalyst Technology III. Catalyst Breakage in a Fixed Bed (2017)
    Wiley
    Details
    Publication Date: 2017-06-13
    Description: A correlation is demonstrated to predict the reduction in the mean length to diameter ratio of catalyst extrudates by breakage due to stress in a fixed bed. The stress can be caused either by the reactor load or the stress can be externally applied as in the bulk crush strength measurement. The strength characteristic of particular interest here is the extrudate bending strength characterized by the Euler-Bernoulli modulus of rupture. The balance of the bending strength to the applied stress leads to a new dimensionless group. Extrudates in a fixed bed start to break above a specific critical stress and their mean length to diameter ratio then becomes linearly proportional with this dimensionless group to the power one third.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 49
    facet.materialart.
    Unknown
    Experimental and Numerical Study of Grinding Media Flow in a Ball Mill (2017)
    Wiley
    Details
    Publication Date: 2017-06-13
    Description: This paper involves an experimental and numerical study on the grinding media dynamics inside a baffled ball mill under different solid flow regimes: cascading, cataracting and centrifuging. The Eulerian approach was used for all simulations and the boundary condition at the drum wall was investigated by means of the specularity coefficient parameter. This effort presents a meaningful temptation in representing the particle-wall interaction in a ball mill. The balls restitution coefficient was experimentally measured using a video camera, and its influence was evaluated by comparing the numerical and experimental outcome of flow patterns. The simulations results showed that the specularity and restitution coefficients effects at the drum wall were more evident at high rotation speeds.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 50
    facet.materialart.
    Unknown
    Characterisation of Powder Layer Dustiness – Influence of the Deposit Thickness (2017)
    Wiley
    Details
    Publication Date: 2017-06-13
    Description: The release of dust during powder processing is generally an undesired process and product property that needs to be controlled. Dustiness has so far been neglected to be properly addressed as a product property in application technology. To measure the redispersion of dust from a particle layer deposited on a surface, the Redispersion Dust in a Double-pipe System (RDDS) device may be used that has been developed for controllable redispersion of deposited dust from surfaces. Different particulate deposits (varying the deposit morphology and thickness) have been generated here by means of an electrostatic precipitator. For different particulate test materials a significant influence of the powder layer formation on the powder redispersion and dustiness has been found.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 51
    facet.materialart.
    Unknown
    Optimization of settling behavior for an efficient solvent-extraction process for bio-based components (2017)
    Wiley
    Details
    Publication Date: 2017-06-13
    Description: Extraction is a downstream-process option in bio-based processes. Since the knowledge of phase-separation behavior is essential for designing efficient separation processes, this study investigates the settling and coalescence behavior of bio-based extraction systems using a standard lab-scale settling cell. The influence of different buffer media as well as of E. coli cells on coalescence was determined for the reactive extraction of hexane-1.6-diamine with isostearic acid and D2EHPA using kerosene and oleyl alcohol as diluents. As a result, an increasing pH value of the buffer significantly increases settling time. The presence of E. coli cells hinders the phase separation of the investigated systems, in particular with dispersed organic phases.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 52
    facet.materialart.
    Unknown
    Implementation of low temperature CO-methanation in oil-tempered plate reactors by the optimization of catalyst activation conditions (2017)
    Wiley
    Details
    Publication Date: 2017-05-31
    Description: The Ni-catalyzed methanation has been discovered more than a hundred years ago. Since then, many applications based on syngas – from coal or biomass – for the production of synthetic natural gas (SNG) have been established. Nevertheless, the methanation still bears great potential for optimization. Especially for decentralized, biomass-based applications, decreased methanation temperatures and pressures are expected to reduce the costs of the overall process. Consequently, it is necessary to obtain a catalyst that is highly active under such reaction conditions (≤ 300 °C, ≤ 5 bar). This objective was successfully reached by a systematic variation of reduction temperature, pressure, and hydrogen concentration under the aspects of the design of experiment within the catalyst activation process. The higher activity achieved at catalyst activation with reduction temperatures below 350 °C allows for high methane yields at methanation below 300 °C.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 53
    facet.materialart.
    Unknown
    Non-invasive 4D Flow Characterization in a Stirred Tank via PC-MRI at 7T (2017)
    Wiley
    Details
    Publication Date: 2017-05-31
    Description: The present work demonstrates that a non-invasive quantification of the hydrodynamics in a stirred tank in space and time is possible using flow sensitive phase-contrast magnetic resonance imaging (PC-MRI) at 7 Tesla (7T). The experimental technique has been developed for a batch crystallizer, but is applicable in principle for a variety of stirred-tank reactors and rotating systems. The PC-MRI technique is able to characterize the unsteady periodic three-dimensional flow velocities with acceptable spatial and temporal resolution, and does not imply that optically transparent fluids are employed. PC-MRI is already widely used for medical diagnostics in order to determine the blood flow velocities, e.g., for cardiovascular applications. However, the utilization of this method is still new for engineering problems, including process engineering. It is therefore important to check the applicability of PC-MRI to applications of practical interest in this field and complement other flow measurement and simulation techniques.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 54
    facet.materialart.
    Unknown
    Effect of acetonitrile-based crystallization conditions on the crystal quality of Vitamin D3 (2017)
    Wiley
    Details
    Publication Date: 2017-05-31
    Description: In order to design an integrated continuous crystallization set-up that is directly coupled to a photosynthesis in flow, the crystallization of Vitamin D 3 was studied in detail. Because of the high solubility of the vitamin in the reaction solvent tert-butylmethyl ether (TBME), a solvent swap to acetonitrile was necessary. While other methods use a multistep procedure, with our approach crystalline Vitamin D 3 can be obtained within one crystallization step. The influence of crystallization parameters, such as the initial concentration of Vitamin D 3 , stirring, as well as the cooling temperature, rate, and time, on the obtained results in terms of yield, crystal shape, polymorphism and particle size distribution are discussed in detail here.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 55
    facet.materialart.
    Unknown
    Preparing the High Performance Membrane Derived from Poly(4-methyl-1-pentene)/Zinc Oxide Particles (2017)
    Wiley
    Details
    Publication Date: 2017-06-03
    Description: The current essay examines the efficiency of gas separation by Mixed Matrix Membrane (MMM) derived from Poly (4-methyl-1-pentene) (PMP) filled by Zinc Oxide nano particles. The membranes are prepared by the solvent evaporation method. The polymer ratio in nano composite membranes is 3% weight; Although the Zinc Oxide nano particles are loaded at the weight percentage of 2.5, 8.5, 10 and 15. The present research reveals that the permeability of the filled membrane by the 15 wt. raised gases separation ratio, like CO 2 and CH 4 are up to 205% and 162% more receptive in comparison to the pure membrane. Furthermore, the CO 2 permeability in PMP-ZnO (15 wt.%) MMMs increased from 113.93 to 321.86 Barrer when the feed pressure was increased from 2 to 8 bar.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 56
    facet.materialart.
    Unknown
    CFD-PBE simulation of a bubble column by the cell average method (2017)
    Wiley
    Details
    Publication Date: 2017-06-08
    Description: An axisymmetric computational fluid dynamics (CFD) simulation coupled with population balance equation (PBE) has been applied in simulating the gas-liquid flow in a bubble column with an in-house code in this work. The novel feature of this simulation is the application of the cell average method in a CFD-PBE coupled model for the first time. The predicted results by this method are compared with those by the traditional fixed pivot method and experimental data. For both methods, the simulated results are in reasonable agreement with the reported experimentally measured values. However, the BSDs by the cell average method is slightly better than those by the fixed pivot method, i.e., the fixed pivot method gives a smaller peak value and a wider bubble size distribution, and the probability density function of large bubbles is higher.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 57
    facet.materialart.
    Unknown
    Modeling and optimization in membrane bioreactor and moving bed biofilm reactor-membrane bioreactor (2017)
    Wiley
    Details
    Publication Date: 2017-06-03
    Description: A membrane bioreactor and two hybrid moving bed biofilm reactor-membrane bioreactor systems were studied regarding the process modeling and operation optimization through different mathematical models for organic matter and nitrogen removal. A multiple linear regression method and a multivariable statistical analysis were applied. The process variables were hydraulic retention time, total biomass concentration, temperature, chemical oxygen demand of the influent and total nitrogen of the influent. In general, the values of coefficient of determination (R 2 ) for the different model fittings were higher for the hybrid MBBR-MBR processes than those obtained for the MBR, probably due to the presence of suspended and attached biomass in the hybrid MBBR-MBR systems.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 58
    facet.materialart.
    Unknown
    Application of Microwave Irradiation for Preparation of KOH/Calcium Aluminate Nanocatalyst and Biodiesel (2017)
    Wiley
    Details
    Publication Date: 2017-06-13
    Description: The microwave combustion method was utilized for the fabrication of KOH/calcium aluminate for microwave-enhanced biodiesel production. The effect of calcium nitrate and potassium hydroxide dosages on the properties and activities of samples was assessed. The results manifested that when the Ca/Al ratio increased from 0.5 to 1.5, the activity enhanced probably due to the transformation of the sample to an active mayenite structure. The activity of the sample was decreased by loading KOH more than 20 wt.% as a result of covering the surface and porosity of support by potassium components. The results of calcination temperature optimization revealed that the potassium component was incorporated in the calcium aluminate lattice by heating over 700 °C. The best sample (prepared at the Ca/Al ratio of 1.5, 20 wt.% of KOH, and calcined at 800 °C) was utilized in the transesterification reaction by two heating systems where the microwave irradiation reduced the reaction time from 240 to 45 min as compared to the conventional hating system. The sample converted 97.5% of canola oil to methyl ester and showed high stability via calcination after each uses.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 59
    facet.materialart.
    Unknown
    Crystal population growth in a continuous helically coiled flow tube crystallizer (2017)
    Wiley
    Details
    Publication Date: 2017-06-30
    Description: A helically coiled flow tube crystallizer was investigated as a novel device for the shape-selective generation of crystals with potassium alum as the model solid. The shape evolution of the crystal population was analyzed for growth-dominated seeded cooling crystallization. The macro-mixing behavior was characterized by residence time distribution measurements for the fluid phase and the crystals. At the crystallizer outlet, a flow-through microscope was used to analyze the crystal size and shape distribution where the 3D shape of individual crystals was estimated from 2D projections. Experiments show a separation of the particle population according to the crystal size. The process allows the controlled shaping of crystals under continuous operating conditions.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 60
    facet.materialart.
    Unknown
    Design and Control Comparison of Alternative Separation Methods for n-Heptane/Isobutanol (2017)
    Wiley
    Details
    Publication Date: 2017-06-30
    Description: The binary mixture of n-heptane and isobutanol forms an azeotrope at atmospheric pressure with composition 66.9 mol% n-heptane and temperature 364 K. Several methods of separation are possible. This paper compares the steady-state economics and the dynamic controllability of three alternative separation techniques: a two-column extractive distillation process, a two-column pressure-swing distillation process and a single column with a refrigerated condenser.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 61
    facet.materialart.
    Unknown
    Colloidal stability of metal nanoparticles in engine oil under thermal and mechanical load (2017)
    Wiley
    Details
    Publication Date: 2017-06-30
    Description: Extended colloidal stability and high dispersion degree of nanolubricants are required to avoid nanoparticle deposition in combustion engines and to reduce friction and wear. In this study, the simple and rapid one-step technique of pulsed laser ablation in liquids is employed to synthesize precursor-free and highly-dispersed gold nanoparticles while the colloidal stability is measured by optical spectroscopy and transmission electron microscopy. We determine a remarkable colloidal stability at engine-like (2 h circulation, 150 °C, 6 bar) and ambient conditions for 9 months in terms of constant primary particle size. In contrast to additive-free oils, almost no agglomeration is observed, which might be attributed to the attachment of engine oil additives or pyrolyzed/oxidized molecules to the nanoparticles preventing attractive nanoparticle interactions.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 62
    facet.materialart.
    Unknown
    Test System for the Investigation of Reactive Taylor Bubbles (2017)
    Wiley
    Details
    Publication Date: 2017-07-07
    Description: Detailed analysis of reactive multiphase flows is still challenging due to the complex linked transport processes. Until now, there is no reliable and reproducible experimental method for gas-liquid flows, which enables the local measurement of dissolved species concentrations of educts, products, and side products at well-defined and reproducible hydrodynamic conditions. A vertically arranged glass channel is used to capture gas bubbles with well-defined wake structures. The hydrodynamic conditions in the wake can be predicted by dimensionless numbers and adapted for most industrially relevant systems. An experimental apparatus is presented for the investigation of the interdependency between hydrodynamics, mass transfer, and chemical reaction. The applicability of the setup is demonstrated with a chemical test system that shows a strong color shift from colorless to blue when the gas-liquid reaction takes place. Detailed analysis of reactive multiphase flows is still challenging due to the complex linked transport processes. Taylor bubbles in channels could be a tool to investigate selectivity differences due to adjustable wake structures in different channel sizes. A first comparison with laser-induced fluorescence, particle image velocimetry, and a color change due to an oxidation reaction showed the great potential of this test system.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 63
    facet.materialart.
    Unknown
    Fabrication of Asymmetrical Straight-Through Microchannel Emulsification Plate for Production of Small Size Monodispersed Emulsion Droplets (2017)
    Wiley
    Details
    Publication Date: 2017-07-07
    Description: Monodispersed emulsion droplets have promising advantages in food, pharmaceutical and chemical industries. In this study, we fabricated the new microchannel emulsification (MCE) plate (model; WMS 8-4) with 176, 176 circular asymmetric through-holes. WMS 8-4 comprised of a series of discrete 12.6 × 1.8 µm outlets on each microchannel line with effective cross-sectional area of 1 cm 2 . The inner diameter of each circular microhole was 1.8 µm. The newly fabricated MCE plate has capacity to produce monodispersed emulsion droplets with Sauter mean diameter of 3.9 μm with relative span factor of 0.15.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 64
    facet.materialart.
    Unknown
    Biosorption and binding mechanisms of Ni2+ and Cd2+ with aerobic granules cultivated in different synthetic media (2017)
    Wiley
    Details
    Publication Date: 2017-07-07
    Description: Aerobic granules synthesized by feeding real wastewater (R-granules) in a sequencing batch reactor were investigated to remove Ni 2+ and Cd 2+ from aqueous solutions for the first time. Simultaneously, the results were compared with granules cultivated using laboratory-synthesized wastewater (S-granules). The results showed that metal biosorption was related to the solution pH, initial metal concentration and reaction time. The biosorption capacities for Ni 2+ and Cd 2+ ions were found to be 101 and 162 mg g -1 , respectively. The chemically modified R-granules showed an increased removal efficiency of almost 20% for the examined metals, and the results were almost identical to those of S-granules. Ion-exchange and complexation with extracellular polymeric substances were the predominant mechanisms involved in Ni 2+ and Cd 2+ loading onto the granules. XPS and FTIR techniques revealed that hydroxyl, carboxyl and amide groups in the S-granules, while carboxyl and hydroxyl groups of polysaccharides in R-granules were mainly associated with binding to Ni 2+ and Cd 2+ . XPS data also exhibited that the oxygen atom in peptide bonds interacted more with heavy metals than the nitrogen atom.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 65
    facet.materialart.
    Unknown
    Performance testing of hydrodesulphurization catalysts using a single pellet string reactor (2017)
    Wiley
    Details
    Publication Date: 2017-07-11
    Description: Small scale parallel trickle bed reactors were used to evaluate the performance of a commercial hydrodesulphurization catalyst under industrially relevant conditions. Catalyst extrudates were loaded as a single string in reactor tubes. It is demonstrated that product sulfur levels and product densities obtained with the single pellet string reactor are close to the results obtained in the bench scale fixed bed reactor operated under the same conditions. Moreover, parallel single string reactors show high reproducibility. To study the hydrodynamic effects of the catalyst bed packing, the catalyst bed length was varied by loading different amounts of catalysts, and crushed catalyst was also loaded.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 66
    facet.materialart.
    Unknown
    Dropwise Condensation on Advanced Functional Surfaces – Theory and Experimental Set-Up (2017)
    Wiley
    Details
    Publication Date: 2017-07-21
    Description: Compared to filmwise condensation on conventional condenser surfaces, heat transfer can be significantly enhanced by tuning the wettability of the surface to promote dropwise condensation. Following rapid advances in surface engineering, the last years have seen an unprecedented interest in dropwise condensation research. This brief review highlights recent advances in theory and experimental investigation regarding dropwise condensation on smooth hydrophobic surfaces, micro- and nanostructured superhydrophobic surfaces, biphilic surfaces with patterned wettability as well as lubricant-infused surfaces.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 67
    facet.materialart.
    Unknown
    Enriched-air or pure oxygen as oxidant for gas-to-liquid process with microchannel reactors (2017)
    Wiley
    Details
    Publication Date: 2017-07-21
    Description: The syngas production step is one of the most costly steps in a gas to liquid plant. It is common practice to use oxygen as oxidant in the reforming step. However, by the introduction of microchannel reactors with their remarkable heat transfer characteristics, high active catalyst site exposure to reactants and therefore high once-through conversions, the use of enriched-air maybe justified. The purpose of this paper is to analyze the merits of using enriched-air versus pure oxygen in the reforming step of a gas to liquid plant utilizing an autothermal reformer (ATR), while microchannel reactors are used in the once-through Fischer-Tropsch (FT) step. Pure oxygen is provided by a cryogenic Air Separation Unit (ASU) and enriched-air by use of air separation membranes. To make the two cases comparable, the total once-through CO conversion is kept the same. By using pure oxygen less FT reactor volume is required which means lower reactor cost at the expense of having a costly cryogenic ASU to produce pure oxygen. The operating cost of ASU is lower than air membrane, while its installed cost is higher. Due to safety and space issues of having a cryogenic ASU offshore, the only viable option is the use of enriched-air, while in an onshore setting, the use of oxygen is more attractive.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 68
    facet.materialart.
    Unknown
    Experimental investigation on gas-solid behavior in the fluidized-bed with superfine particles (2017)
    Wiley
    Details
    Publication Date: 2017-07-21
    Description: Fluidized beds have been commercially utilized in gas-solid contacting processes such as FCC process. Attempts have been made for bubbling fluidized beds to enhance gas exchange between the bubble phase and the emulsion phase as well as to increase bubble hold up. In this study, low-density superfine particles 5070S was selected whose average diameter is about 10 μm. Unlike agglomerate particulate fluidization of superfine particles on which other researchers have reported, the smaller bubbles whose diameter is less than 10 mm uniformly dispersed in the whole bed. Additionally, the gas exchange rate with 5070S became larger than FCC particle. We concluded that such a unique gas-solid behavior is probably due to the proper density difference between particle aggregate and fluidizing gas.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 69
    facet.materialart.
    Unknown
    Development of a hydrothermal liquefaction process using microalgae for improvement of bio-crude yield and phosphorous content (2017)
    Wiley
    Details
    Publication Date: 2017-07-21
    Description: Hydrothermal liquefaction (HTL) is a thermal depolymerization process used to convert wet biomass such as microalgae into bio-crude oil. Four main products, gas, bio-crude oil, an aqueous phase, and solid residue, are generated through HTL. In this study, we investigated HTL conditions to enhance the phosphorous content in the aqueous phase as well as the yield of bio-crude oil. Tetraselmis sp. was used as a microalgae feedstock, and the product yields according to catalyst type were explored. The phosphate ion (PO 4 3- ) content in the aqueous phase was significantly enhanced when acetic acid was added owing to the effect of pH. In addition, it was found that both bio-crude yield and the ammonium ion content were increased by recycling the post-HTL aqueous phase, while the phosphate content was not.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 70
    facet.materialart.
    Unknown
    Analysis of in situ microscopy images of flocculated sediment volumes (2017)
    Wiley
    Details
    Publication Date: 2017-07-21
    Description: An in situ microscopy method was applied to study the sediment volumes that result from batch settling of polymer flocculated kaolin suspensions. Statistical methods were applied including chord length distributions, perimeter based fractal dimension of the void areas, white area image ratio, and gray level co-occurrence (GLCM) features. Several GLCM features have a good linear relationship with aggregation state (0.78 〈 R 2 〈 0.82) and the parameters of aggregate and void chord distributions can be interpreted to help explain the flocculation results. The methods applied here are suggested for measuring aggregation state or relative aggregate volume on the bench or industrial scale when the settled suspension interface is not available, such as in a continuous process or reaction.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 71
    facet.materialart.
    Unknown
    A continuous process for the purification of terpenyl amines using a reversible acid-base reaction (2017)
    Wiley
    Details
    Publication Date: 2017-07-25
    Description: The reversible reactive extraction of long-chain terpenyl amines (TPAs) using organic acids as reactive extractants was investigated. The scope of suitable acids has been extended and semi-continuous and continuous experiments were performed to prove the applicability of this concept. High extraction yields could be achieved using a variety of acids in batch and semi-continuous experiments. Furthermore, the recovery and separation of the extracted terpenyl amines from the extractant phase has been studied. The terpenyl amines can be recovered in high yields and purities by simple means of process parameter changes. The proposed process allows the separation and purification of terpenyl amines in high yields and purities without the creation of salts or other chemical by-products.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 72
    facet.materialart.
    Unknown
    Transesterification of canola oil to biodiesel using CaO/talc nanopowder as a mixed oxide catalyst (2017)
    Wiley
    Details
    Publication Date: 2017-07-27
    Description: A series of heterogeneous catalysts including different molar ratios of CaO/talc was synthesized to study the transesterification reaction of canola oil and methanol under different reaction conditions. Characterization and kinetic results revealed that the activity of this catalyst was enhanced due to the increase of CaO/talc molar ratio value leading to an improvement in the biodiesel production. Moreover, the effect of various parameters on the activity of the undertaken catalysts was studied in order to determine the optimum process conditions. Ultimately, leaching measurements and the durability of the CaO/talc catalyst under several reaction cycles were investigated exhibiting it to be a stable catalyst.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 73
    facet.materialart.
    Unknown
    Development of a robust fixed bed reactor model for the supercritical Citral-hydrogenation (2017)
    Wiley
    Details
    Publication Date: 2017-07-27
    Description: The hydrogenation of Citral in a fixed bed reactor using supercritical carbon dioxide was studied. A numerical model was set up using the commercial software Aspen Custom Modeler®. Applying literature experimental data, a parameter estimation for the kinetic parameters was carried out. A good fit was reached with the presented model. Furthermore, a sensitivity analysis was performed. The influence of process pressure, inlet CO2- and Hydrogen concentration and catalyst particle size on conversion, reactor length, space time yield, yield of the intermediate product 3,7-dimethyl-2-octenal and pressure drop was investigated.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 74
    facet.materialart.
    Unknown
    CO2 ABSORPTION AND REGENERATION USING AMINES WITH DIFFERENT DEGREE OF STERIC HINDERING (2017)
    Wiley
    Details
    Publication Date: 2017-07-27
    Description: Present work analyzes the influence of hindering in amines upon different characteristics in carbon dioxide chemical absorption: absorption rate, carbon dioxide loading and regeneration degree. Monoethanolamine (MEA) aqueous solutions were used to compare the behavior of 1-amino-2-propanol (AP) and 2-amino-2-methyl-1-propanol (AMP) aqueous solutions during carbon dioxide absorption. The presence of one or two methyl groups in the carbon near to amino group produce changes in the analyzed parameters. Also the influences of gas flow-rate and amine concentration in the chemical solvent behavior were studied in order to improve the mass transfer under different experimental conditions.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 75
    facet.materialart.
    Unknown
    Homogeneous gas-liquid distribution for monolithic structures via a needle distributor (2017)
    Wiley
    Details
    Publication Date: 2017-07-27
    Description: Structured catalysts are a widely discussed approach for process intensification of chemical multiphase reactors. But equal to common catalyst structures homogeneous educt distribution along the catalytic surface is mandatory for high reactor performance. Especially monolithic structures require a homogeneous initial fluid distribution.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 76
    facet.materialart.
    Unknown
    Meniscus asymmetry and chemo-Marangoni convection in capillaries (2017)
    Wiley
    Details
    Publication Date: 2017-07-27
    Description: We experimentally study a liquid-liquid system inside a capillary in which an interfacial reaction leads to an in-situ production of a surfactant. As a result, a chemo-Marangoni convection appears which induces periodic spreading-dewetting cycles in laboratory experiments. By selected experiments in microgravity, the individual phenomena of the system dynamics could be isolated. The spreading-dewetting cycles result from a complex interplay between the decrease of interfacial tension by the production of surfactant, the chemo-Marangoni convection, and the gravity-driven deformation of the meniscus shape.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 77
    facet.materialart.
    Unknown
    Activity Hysteresis during cyclic TPReactions in the Partial Oxidation of Acrolein to Acrylic Acid (2017)
    Wiley
    Details
    Publication Date: 2017-07-27
    Description: Oxidation of acrolein to acrylic acid on Mo/V/W-mixed oxide catalyst was studied by transient (cyclic temperature-programmed (TP)) as well as steady state methods. TPReactions exhibits an activity hysteresis of the catalyst with respect to temperature. As a result of the steady state measurements, the activity hysteresis is not related to multiple steady states and is exclusively a transient phenomenon. Generally, the dynamics of bulk-oxygen plays a key role leading to a reversible oxidation/reduction of the catalyst surface, which influences the activity. This means the bulk acts as oxygen buffer. In this context a reaction model, which contains the participation of bulk-oxygen, has been deduced and verified by modeling.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 78
    facet.materialart.
    Unknown
    An Eulerian-Eulerian Computational Approach for Simulating Descending Gas-Liquid Flows in Reactors with Solid Foam Internals (2017)
    Wiley
    Details
    Publication Date: 2017-07-27
    Description: Chemical reactors with new types of packings, such as metallic and ceramic open-pore foams, have become of subjects of scientific and engineering interest in the past decades. For so-called trickle bed reactors the new packing types provide favorable conditions, such as a high specific surface area and low pressure drop, which are believed to contribute to an intensification of mass and heat transfer. While a number of experimental studies have been recently been reported in literature, hydrodynamic modelling and simulation, particularly at the full reactor scale, is still in its infancy due to the complexity of two-phase flow in such non-regular packings. In this work, an attempt has been made to model and predict flow pattern and liquid distribution in a trickle bed reactor with solid foams using computational fluid dynamics. A three-dimensional model based on the relative permeability approach was adopted, where gas and liquid phases flow co-currently downwards through a reactor with SiSiC ceramic foams as internals. The influence of both mechanical and capillary dispersion is included and studied in detail for foams of two different pore densities and for different initial distribution patterns. The simulation results are validated against experimental data. In particular, the effects of gas and liquid superficial velocities and pore density on liquid holdup and two-phase pressure drop were studied in detail. The liquid distribution at different heights in the flow direction is reported along with the capillary and mechanical dispersion forces for both multipoint and single point distributor.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 79
    facet.materialart.
    Unknown
    Study of urea decomposition in SCR on V2O5/WO3/TiO2 catalyst in diesel exhaust (2017)
    Wiley
    Details
    Publication Date: 2017-07-27
    Description: This paper addresses the selective catalytic reduction of NO x (SCR) in diesel exhaust by using a monolithic V 2 O 5 /WO 3 /TiO 2 catalyst and urea as reducing agent. A special laboratory test bench was used enabling the supply of aqueous urea solution (“AdBlue”) or gaseous NH 3 and admitting realistic flow conditions (Reynolds numbers 〈 230). The residence time from AdBlue dosing nozzle to catalyst was ca. 0.037 s. The tests provided very similar standard and fast SCR performance between 150 and 350 °C when dosing AdBlue and NH 3 . For standard urea-SCR, axial concentration profiles were evaluated by employing catalyst monoliths with different lengths corresponding to space velocities between 85,000 and 425,000 h – 1 . The results evidenced incomplete conversion of urea and isocyanic acid along the catalyst, especially at low temperatures. Despite this, local SCR rates were not significantly affected by the under-stoichiometric concentration of NH 3 . This was substantiated by kinetic analysis showing an activation energy of ca. 68 kJ mol – 1 typical for standard NH 3 -SCR. However, above 250 °C SCR was limited by internal mass transport as indicated by Weisz-Prater criterion and clearly lower activation barrier (ca. 26 kJ mol – 1 ). Furthermore, formation of deposits was investigated at low temperatures (175 °C and below) in 3 h runs. In these tests, some urea was deposited around the nozzle, whereas in front of and behind the catalyst cyanuric acid and biuret were additionally found originated from side reactions of urea and isocyanic acid. The deposits were quantitatively checked by HPLC, while qualitative analysis was made by ATR IR.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 80
    facet.materialart.
    Unknown
    Formation of Spherical Agglomerates in the Cooling Crystallization of Hexahydro-1,3,5-trinitro-1,3,5-triazine (2017)
    Wiley
    Details
    Publication Date: 2017-07-28
    Description: The present work describes the production of spherical agglomerates of Hexahydro-1,3,5-trinitro-1,3,5-triazine(RDX) from acetone by cooling crystallization with polyvinylpyrrolidone (PVP). It was found that PVP suppresses the nucleation of RDX at initial stage, but tremendous nucleation of RDX is occurred abruptly after induction period. The rapid nucleation may be associated with the primary nucleation by the presence of PVP. Thus, it can be concluded that the addition of PVP results in the formation of RDX particles with sufficient number density for spherical agglomeration. It was found that such spherical agglomeration propagates very rapidly after nucleation within a minute and size of spherical agglomerates is affected by cooling rate.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 81
    facet.materialart.
    Unknown
    Slurry Utilization and Impact of Mixing Ratio in Biogas Production (2017)
    Wiley
    Details
    Publication Date: 2017-08-04
    Description: The anaerobic conversion of waste to biogas in a biogas digester is influenced by a number of factors including mixing ratios, type of substrate, temperature, organic loading rate, pH, and carbon/nitrogen ratio. The appropriate mixing ratio of water and animal waste leads to effective biogas yield. Different mixing ratios proposed in literature for various animal waste for improving biogas yield are reviewed. Characterization and application of animal slurry, the choice of animal slurry as suitable feedstock for biogas production, the storage of animal slurry, the agitation process of slurry as well as mixing ratios of animal slurry are evaluated. Animal manure is a key organic matter with potential to produce renewable fuels through anaerobic digestion and reducing greenhouse gas emissions, especially methane. The usage of animal slurry for producing biogas and fertilizer is reviewed. Anaerobic conversion of waste to biogas in biogas digesters is influenced by various factors. The mixing ratio of waste and water is a decisive factor.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 82
    facet.materialart.
    Unknown
    Velocity uniformity of microchannels in a laminated-sheet structure under parallel and series methods (2017)
    Wiley
    Details
    Publication Date: 2017-08-04
    Description: An integral microchannel device is generally formed by the lamination of multiple microchannel sheets. Uniform velocity distribution among the microchannels in each sheet shows a large influence on the device's performance. In this work, the effect of microchannel and manifold structure on the velocity uniformity in each sheet with different structural parameters under parallel and series laminated structures are investigated. Results indicate that for the laminated-sheet structure where each sheet has the same structural parameters, a more uniform velocity distribution exists as compared to where they have different structural parameters. There exists a direct correlation between the velocity values in each sheet and structural parameters whereas an inverse correlation is found under series laminated structure. A small microchannel width, depth and side height of manifold are favorable for achieving a relatively uniform velocity distribution in each sheet under the parallel laminated structure when the sheets are sequentially ordered. A large E , small W and H can result in velocity uniformity under series laminated structure. Parallel laminated structure can result in smaller velocity values and achieve more uniform velocity distribution than series laminated structure.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 83
    facet.materialart.
    Unknown
    Start and Stop Operation of Fixed-Bed Methanation Reactors – Results from Modeling and Simulation (2017)
    Wiley
    Details
    Publication Date: 2017-08-05
    Description: The production of SNG from renewable sources in cases requires a dynamic and intermitted operation of the methanation reactors. This may lead to catalyst damage. Therefore, the present work is aiming at identifying restrictions and optimization approaches of the start and stop operation of fixed-bed methanation reactors. 2D modeling and simulation work is conducted and the warm start behavior of a fixed-bed reactor after 1 to 4 hours operation intermittence is analyzed. The analysis reveals the possibility for an operation interruption of up to 4 hours without high adaptation effort to restart the reactor. After approximately 4 hours the catalyst bed at the inlet part of the reactor reaches a temperature that provokes problems for a subsequent warm start.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 84
    facet.materialart.
    Unknown
    Enhanced CO2 capture performance of limestone by industrial waste sludge (2017)
    Wiley
    Details
    Publication Date: 2017-08-05
    Description: Although inert supports have been proved effective to enhance CO 2 capture performance of CaO sorbents, more commonly used supports are derived from expensive raw materials (such as nitrates and organometallic precursors). This work utilized cheap waste sludge from the steel plant, which is of a high daily output and has not received effective reuse, to promote the CO 2 capture performance. The results showed that the sludge effectively promoted the performance of limestone. Homogeneously dispersed inert material of MgO, acting as the metal framework to resist sintering, was responsible for the enhanced performance. The introduction of waste sludge into the calcium looping could not only improve the sorbent performance, but also provide a potentially effective way to reuse the waste sludge.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 85
    facet.materialart.
    Unknown
    Multi-step Consecutive Photo-chlorination of 1,2-Dichloroethane: Kinetics and Reactive Distillation Experiment (2017)
    Wiley
    Details
    Publication Date: 2017-08-08
    Description: The development and validation of a novel kinetic model for the 1,2-dichloroethane chlorination to ultimate hexachloroethane catalyzed by blue light are presented. A factor ( X m ) related to chlorination depth was introduced into the kinetics model, and the results showed that the dynamic features of the photo-chlorination are better predicted by the modified model than the conventional one. Furthermore, to enhance the selectivity towards tetrachloroethane and pentachloroethane, a novel reactive distillation with side reactor configuration (SRC) for the photo-chlorination process was proposed. For demonstrating the technical feasibility of the process, semi-batch SRC experiments in a laboratory scale were carried out. Up to 96.5 wt% of tetrachloroethane and pentachloroethane with molar ratios varied from 7 to 0.7 over time were obtained in the bottom product.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 86
    facet.materialart.
    Unknown
    Absorption of CO2 with amino acids-based ionic liquids and the corresponding amino acids precursors (2017)
    Wiley
    Details
    Publication Date: 2017-08-08
    Description: A comparative study for CO 2 absorption among amino acids (AAs) and ionic liquids (ILs) containing Tetramethylammonium [TMA] and Tetrabutylphosphonium [TBP] as cations and the corresponding deprotonated amino acid as anions ([TMA][AA] and [TBP][AA]) is reported. Amino acids show an excellent performance for CO 2 capture, better than the corresponding [TMA][AA], but AAs are less efficient than [TBP][AA]. In addition [TBP][AA] present faster kinetic of absorption than the corresponding AA. [TBP][Lysinate] shows the highest CO2 absorption capacity. A novel, fast and low energy demanding method for the microwave-assisted regeneration of the absorbents from the CO 2 saturated solution is also described for the first time.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 87
    facet.materialart.
    Unknown
    Advanced Operating Strategies to Extend the Applications of Simulated Moving Bed Chromatography (2017)
    Wiley
    Details
    Publication Date: 2017-08-09
    Description: Chromatographic separation with solid stationary and fluid mobile phases is widely used to isolate and purify compounds. One of the most productive improvements in preparative chromatography is the simulated moving bed (SMB) process, which enables continuous feed supply and product removal by periodic operation of a multi-column to simulate a counter-current flow between the phases. The SMB process produces high-purity compounds, even with low selectivity, and offers higher productivity and lower eluent consumption than batch chromatography. Recently, intensive efforts have been made to expand the range of applications through the design, modeling, and optimization of the SMB process to produce advanced operating strategies, which are described and evaluated in this paper.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 88
    facet.materialart.
    Unknown
    Hydrogen production from co-gasification of coal and biomass in precence of CaO as a sorbent (2017)
    Wiley
    Details
    Publication Date: 2017-09-27
    Description: Among the options for clean energy production, gasification process is recently receiving increasing attention as it offers the best combination of investment and value of produced electricity compared to other methods. In this paper, an Aspen Plus model of co-gasification of biomass and coal with in situ CO 2 capture was developed, to evaluate its potential for hydrogen production and cracking of organic impurities (tars). Effects of some critical operational variables on gas composition and the yields of hydrogen gas and tar were studied. For coal/biomass ratio (C/B) varying between 0.25 and 0.75 (wt/wt), the tar content in the produced gas lowered from 11.88 (g/Nm 3 ) to 09.96 (g/Nm 3 ) and then increased to 10.31 (g/Nm 3 ), whilst the hydrogen yield and CCE increased, respectively, from 39.91 (g/kg fuel) to 41.88 (g/kg fuel) and from 67.85 % to 75.23%. The obtained results also showed that the d p plays a minor role in the process; smaller particles favor the conversion of tar and production of more hydrogen gas. With d p varied from 2.5 to 1.0 mm, hydrogen yield slightly increased from 50.24 to 52.43 (g/kg fuel) while the tar content decreased from 05.03 to 1.04 (g/Nm 3 ).
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 89
    facet.materialart.
    Unknown
    Effect of 1-Methylimidazole on CO2 Absorption by Diethylenetriamine (DETA) Aqueous Solutions (2017)
    Wiley
    Details
    Publication Date: 2017-09-29
    Description: Phase-splitting absorbents represent a promising technology in relation to the low energy levels required during the CO 2 capture process. In this work, 1-methylimidazole was added to a diethylenetriamine (DETA) aqueous solution for high CO 2 loading via the phase splitting of absorbents during CO 2 absorption. Phase splitting was observed during the absorption process when the loading of CO 2 reaches a value suitable for the mixture f DETA, 1-methylimidazole, and water. The distribution of individual components in each phase was measured according to the total organic carbon and GC. DETA and CO 2 were concentrated in the bottom phase and 1-methylimidazole was mostly in the top phase. From these results, it was presumed that phase splitting during CO 2 absorption was mainly due to the solubility limitation of DETA carbamate into 1-methylimidazole. The volume reduction in the bottom phase by phase-splitting is expected to reduce the heat duty during the regeneration process.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 90
    facet.materialart.
    Unknown
    Performance of new and artificially aged electret filters in indoor air cleaners (2017)
    Wiley
    Details
    Publication Date: 2017-10-05
    Description: Mobile air cleaners, in particular such with fibrous electret filters, are widely used to improve the indoor air quality. We investigate the particle size dependence of the air cleaning efficiency and conclude that recent testing standards overestimate the cleaning performance with respect to relevant indoor aerosols if considering only particles larger than 0.3 µm. Furthermore, we artificially age the filters with cigarette smoke to evaluate their long-term stability. Finally, we compare the results to an aging method proposed by a recent testing standard and find a very distinct aging behavior.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 91
    facet.materialart.
    Unknown
    Editorial Board: Chem. Eng. Technol. 10/2017 (2017)
    Wiley
    Details
    Publication Date: 2017-09-26
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 92
    facet.materialart.
    Unknown
    Cake Filtration of Multi-Component Suspensions (2017)
    Wiley
    Details
    Publication Date: 2017-10-05
    Description: To investigate the separation behavior of multi-component suspensions (emulsion-slurries) consisting of oil droplets and solid particles suspended in water cake filtration experiments were conducted. It could be shown that up to a certain volumetric content of oil droplets all oil was held back by the filter cake. Due to the deposition of the oil droplets inside the filter cakes low porosities have been obtained, which lead to high specific cake resistances. The relationship between resistance and porosity could be described very well using an established power law approach. The results therefore show an extended range of validity to lower filter cake porosities.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 93
    facet.materialart.
    Unknown
    Development of a Dynamic Process Model for the Mechanical Fluid Separation in Decanter Centrifuges (2017)
    Wiley
    Details
    Publication Date: 2017-10-05
    Description: This work presents a dynamic process model for the simulation of the separation process in counter-current decanter centrifuges. The numerical approach uses an interconnection of compartments to characterize the residence time distribution of the particles within the centrifuge. First the theoretical basis of the numerical approach is presented. Compared to the state of the art modelling of decanter centrifuges, the presented approach allows the simulation of the temporal filling process. The small computing time results in further advantages of the dynamic process model. The so called real-time simulation is an opportunity for a model-based control of the separation process. Exemplary simulation with the product limestone show the main features of the numerical approach.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 94
    facet.materialart.
    Unknown
    Chemical Absorption of Carbon Dioxide Using Aqueous Piperidine Derivatives (2017)
    Wiley
    Details
    Publication Date: 2017-10-05
    Description: The heat of CO 2 absorption is one of the important factors determining the operating cost of the CO 2 absorption process when using aqueous amine solutions. Aqueous monoethanolamine (MEA) solution is a commercial absorbent, but has several drawbacks, including a high heat of absorption, high rate of absorbent degradation, and high rate of system corrosion. Although piperidine (PIPD) has a high heat of absorption, it shows good CO 2 absorption performance, including a high rate of CO 2 absorption and a high CO 2 loading capacity in comparison to MEA. We selected PIPD derivatives to identify the effect of functional groups of PIPD on the CO 2 loading and heat of absorption. The effect of the position of a methyl group (-CH 3 ) or a hydroxymethyl group (-CH 2 OH) on the CO 2 absorption performance and heat of absorption was studied at 313 K. Introduction of a methyl group to the PIPD molecule increased heat of absorption, whereas a hydroxyl group decreased it. In particular, the aqueous solution of 3-piperidinemethanol (3-PIPDM) introduced hydroxyl groups appeared the lowest heat of absorption, which is as low as 25.9 % of that of MEA. The results indicate that the introduction of functional groups in particular positions could provide advantages in CO 2 absorption and stripping performance.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 95
    facet.materialart.
    Unknown
    Overview Contents: Chemie Ingenieur Technik 10/2017 (2017)
    Wiley
    Details
    Publication Date: 2017-09-26
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 96
    facet.materialart.
    Unknown
    Overview Contents: Chem. Eng. Technol. 10/2017 (2017)
    Wiley
    Details
    Publication Date: 2017-09-26
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 97
    facet.materialart.
    Unknown
    Cover Picture: Chem. Eng. Technol. 10/2017 (2017)
    Wiley
    Details
    Publication Date: 2017-09-26
    Description: Medical pharmacology laboratory for chemical analysis reactor. Copyright: Zarya Maxim Alexandrovich@@ Shutterstock
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 98
    facet.materialart.
    Unknown
    Highlights: Chem. Eng. Technol. 10/2017 (2017)
    Wiley
    Details
    Publication Date: 2017-09-26
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 99
    facet.materialart.
    Unknown
    A Model to evaluate the Dustiness of Powders and binary Powder Mixtures (2017)
    Wiley
    Details
    Publication Date: 2017-10-05
    Description: Dust emissions of powder handling processes lead to several problems in regards to health, environment and product quality. Currently there is no universal method to predict the character and extent of dust release. Therefore in this article a model to evaluate the dustiness of powders and binary powder mixtures is introduced and discussed. The disperse characteristics, different particulate material compositions and the effective adhesive forces are considered as the leading factors affecting the dustiness. The outcome of the model enables one to compare theoretical dust emissions from different designed powders and to predict the composition of the released dust. Based on corundum-blended limestone powder the model is demonstrated. The study also yields a comparison to experimental data.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 100
    facet.materialart.
    Unknown
    Performance analysis on entrained-flow gasifier by coal moisture (2017)
    Wiley
    Details
    Publication Date: 2017-10-13
    Description: The performance of a 300 MW-class Shell entrained-flow gasifier along with moisture contents in low-rank coal was studied by a rigorous dynamic model. The developed model predicted the steady-state reference data well. The gas and slag temperature profiles decreased with increasing the coal moisture content, which led to increasing the slag thickness on the gasifier wall. The high-moisture coal resulted in reduced power generation along with reduced lower heating value (LHV) of syngas, higher amount of oxygen supply, and less energy recovery in the membrane. The amount of coal required to produce the same total LHV of syngas was smallest when the coal was dried to 5% moisture. Therefore, the coal-drying level for appropriate power production was between 5 and 10%.
    Print ISSN: 0930-7516
    Electronic ISSN: 1521-4125
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...