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  • Wiley-Blackwell  (148)
  • 1
    Electronic Resource
    Electronic Resource
    Boundary-layer flow on a rotary vane (1971)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 17 (1971), S. 1448-1452 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The boundary-layer flow on a rotating vane is investigated with the integral momentum approximation. A parabolic velocity profile is approached over a significant portion of the vane. The assumption of a parabolic velocity profile yields a closed analytical solution for the radial dependence of the surface velocity. Experimental data obtained agree with the predicted average velocity at the exit of the vane.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690170628
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  • 2
    Electronic Resource
    Electronic Resource
    Penetration of vapor jets submerged in subcooled liquids (1973)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 19 (1973), S. 552-558 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: An experimental investigation of the penetration distance required for complete condensation of a submerged turbulent vapor jet injected into a quiescent liquid bath of the same material was made. The bath was maintained in a subcooled condition at a temperature below the boiling temperature of the liquid at the bath pressure. The experiments were limited to choked injector Hows with the penetration regime such that buoyancy effects are negligible. Tests were run for water, ethylene glycol, and iso-octane over a range of flow rates and bath pressures. A theoretical expression for the vapor penetration distance was developed utilizing a variable density single fluid model for the two-phase flow, with the turbulent mixing process treated by an entrainment law. Corrections for the external expansion of the choked flow beyond the injector exit were also determined. This model was found to correlate the results of both the present experiments and those of earlier investigators over a wide range of operating conditions and injector geometries.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690190321
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  • 3
    Electronic Resource
    Electronic Resource
    Penetration characteristics of a submerged steam jet (1972)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 18 (1972), S. 548-553 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: An experimental investigation was made of the lenght of the turbulent vapor cavity formed by a steam jet discharging into a subcooled liquid water both. The experiments considered both constant area and convergent-divergent steam injectors of various external geometries. The tests were conducted with the bath at atmospheric pressure, bath temperatures in the range 301-358K, injector exit diameters in the range 0.00040-0.0112 m, for choked injector flows having mass velocities in the range 332-2050 kg/m2.s. These conditions yielded injector exit Reynolds numbers from 2 to 150 × 104. Over this range a correlation was developed to yield the length of the vapor cavity as a function of the injector diameter, exit mass velocity, and a driving potential for the condensation process. The heat transfer coefficients for this condensation process were found to be significantly greater than those encountered in turbulent film condensation processes in the vicinity of tubes and walls.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690180314
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  • 4
    Electronic Resource
    Electronic Resource
    Catalyst aging in a process for liquefaction and hydrodesulfurization of coal (1976)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 22 (1976), S. 576-581 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Aged CoO/MoO3/SiO2/Al2O3 catalyst pellets, used in a pilot plant for the single-stage liquefaction and hydrodesulfurization of coal, were analyzed with an electron microprobe and scanning electron microscope. The results demonstrate the occurrence of catalyst aging processes which could lead to bed plugging and pore mouth blocking.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690220323
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  • 5
    Electronic Resource
    Electronic Resource
    Chemical factors in propellant ignitionThis study was supported by U. S. Naval Ordnance Test Station Contract N123-60530S-1980. It comprises part of a thesis to be presented by Ferron A. Olson in partial fulfillment of the requirement for the degree of doctor of philosophy at the University of Utah. (1955)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 1 (1955), S. 391-400 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: A method of studying solid propellant ignition is described which utilizes detonating gas igniters. This article describes (1) conditions required for obtaining reproducible igniter systems and (2) results of application of the method to four well-known rocket propellants in which various “chemical” and “thermal” effects were brought out by suitable variations in the initial pressure and composition of the detonating gas igniter. Successful application of the detonating-gas-igniter method requires the use of steady state detonation waves, i.e., waves in which the detonation head has attained a steady “size” and momentum. Experimental data are presented which show that detonation (following the initial predetonation buildup) must travel 40 to 50 cm. in a 1-in. diam. steel tube before these steady state conditions are established in the systems studied.Results of studies by the detonating gas ignition method show that, besides the important purely physical effects of temperature and pressure, free oxygen and solid carbon in the igniter system are very effective in lowering the threshold ignition pressure. Moreover, increasing oxygen in the igniter markedly lowers the ignition time lag (τp) for appearance of an observable flame although it increases the time lag (τi) for appearance of reaction sufficient to cause the first measurable ionization in the reaction zone (τp ≫ τi). Although true flame-ignition time lags were observed to be of the order of several milliseconds, reaction of the propellant was observed to start within 1 msec. (possibly immediately) after collision of the detonation wave with the propellant.The detonating gas method is shown to provide a reliable measure of the relative ignition sensitivities of various rocket propellants.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690010319
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  • 6
    Electronic Resource
    Electronic Resource
    The properties of gases and liquids: Their estimation and correlation, Robert C. Reid and Thomas K. Sherwood, McGraw-Hill Book Company, Inc., New York (1958). 386 pages. $10.00. (1958)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 4 (1958), S. 500 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690040426
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  • 7
    Electronic Resource
    Electronic Resource
    Measurements of turbulent flow development in tubes and annuli with square or rounded entrances (1963)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 9 (1963), S. 766-770 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Entrance-region studies, based on static-pressure measurements, were carried out with water flowing in annuli and a circular tube fitted with interchangeable square or rounded entrance sections. The tests covered the Reynolds number range from 16,000 to 70,000. For the annuli, the length of duct required to approach to within 5% of the fully developed pressure gradient was about 20 to 25 hydraulic diameters. This is in general accord with entrance length results for circular tubes and parallel-plate channels but differs from prior results for the annulus which had indicated entrance lengths larger by a factor of ten. The results for the sharp entrance showed a definite effect of separation and were characterized by high loss coefficients. For the rounded entrance, the initial part of the flow development was laminar; the entrance-region pressure drop did not substantially exceed (and in one case was less than) the corresponding fully developed pressure drop. Also for the rounded entrance, flow stability was improved and a monotonically decreasing pressure gradient obtained when a turbulent boundary layer was induced by means of a trip. Fully developed friction factors were calculated and compared with theory.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690090612
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  • 8
    Electronic Resource
    Electronic Resource
    Dense-bed column crystallizer: An experimental and analytical study (1974)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 20 (1974), S. 1118-1124 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The performance of a continuous, vertical, dense-bed column crystallizer is evaluated by comparing experimental and predicted column temperature profiles and by examining product composition at various operating conditions. The separation obtained in an eutectic system is modeled by a component conservation equation coupled with a nonadiabatic energy balance equation. The critical parameter in the analysis is the axial dispersion coefficient and the measured values of this coefficient were similar in magnitude to those reported for ice washing columns. The dense-bed column apparently achieves nearly ideal plug flow.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690200609
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  • 9
    Electronic Resource
    Electronic Resource
    Continuous coagulation of milk using immobilized enzymes in a fluidized-bed reactor (1975)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 17 (1975), S. 585-598 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Milk-clotting enzymes such as pepsin, chymosin, chymotrypsin, and M. miehei proteases were immobilized on porous, alkylamine glass and incorporated into a fluidized-bed continuous coagulation scheme. Only pepsin and calf rennet retained sufficient activity towards skim milk to warrant further studies. Comparison of kinetic data with fixed-bed reactors revealed the overall superior performance of fluidized beds; higher clotting activities were possible while avoiding plugging problems and high pressure drops common to fixed-bed reactors. Film diffusion and catalyst back-mixing appear to be significant factors in the overall kinetics.All enzymes lost activity on exposure to skim milk. The inactivation rates were lower at high substrate pH and insignificantly affected by reactor temperature. Nitrogen and sialic acid accumulation on the porous glass paralleled the loss in activity in the initial stages. Attempts to regenerate the immobilized enzymes were partially successful.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260170410
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  • 10
    Electronic Resource
    Electronic Resource
    Stability characteristics of pepsin immobilized on protein-coated glass used for continous milk coagulation (1976)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 18 (1976), S. 273-279 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260180212
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