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  • Wiley-Blackwell  (8)
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  • 1
    Electronic Resource
    Electronic Resource
    Gas absorption accompanied by a liquid-phase chemical reaction (1958)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 4 (1958), S. 223-230 
    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 rate of absorption of chlorine from chlorine-nitrogen mixtures into solutions of ferrous chloride in 0.203 N aqueous hydrochloric acid was studied in a short wetted-wall column. Dimensional analysis and the film and penetration theories were used to infer, from the absorption rate data, that the chemical reaction between chlorine and the ferrous ion is second order. The absorption-rate results for experiments with a dilute gas phase agreed with theoretical predictions for absorption accompanied by a second order reaction with a reaction rate constant of 188 liters/(g. mole) (sec.). The results for experiments with pure chlorine gas deviated from the rest of the results, and they did not agree with the theoretical equations. It was shown that the assumption of a three-step mechanism for the chemical reaction, including the formation of a complex ion and the decompositon of this complex ion, explains, at least qualitatively, the deviations observed for the pure chlorine gas runs.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690040219
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  • 2
    Electronic Resource
    Electronic Resource
    An analysis of oxygen absorption in a tubular membrane oxygenator (1968)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 14 (1968), S. 703-708 
    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 analysis of oxygen absorption by blood flowing through a small oxygen-permeable fiber in steady state laminar flow is presented. The rigidity and geometry of the fibers eliminate unpredictable shunting and distention, permitting a more detailed analysis of blood-membrane factors than has previously been undertaken. The mathematical analysis treats the blood as a homogeneous, non-Newtonian fluid with a reversible nonlinear oxygen sink (erythrocytes). The differential equations are solved numerically and the results of the parametric analysis are presented. The parameters that have a major influence on residence time necessary to obtain a specified oxygen content are the Grashof number, the concentration of hemoglobin in the blood, and wall Nusselt number, γ: γ = DLαL/DMαM In [1 + tm/R] where D = diffusion coefficient, α = Bunsen solubility coefficient, subscript L = liquid in tube, subscript M = tube material, R = inner radius of tube, tm = tube wall thickness.Comparison of the experimental results to the model indicate that mixing due to the heterogeneous nature of blood is minimal and that the major limitation in oxygen absorption is the blood film. Means of reducing this resistance are discussed.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690140505
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  • 3
    Electronic Resource
    Electronic Resource
    Solid-catalyzed reaction in a fluidized bed (1959)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 5 (1959), S. 419-426 
    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: Results are presented for the solid-catalyzed hydrogenation of ethylene in fixed and fluidized beds. The effect of gas velocity, bed height, catalyst activity, particle size, and internal baffles on fluidized reactor efficiency are given, and Equations derived from a simplified mathematical model correlate the data.
    Additional Material: 16 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690050405
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  • 4
    Electronic Resource
    Electronic Resource
    Hydrodynamics and heat transfer in fluidized beds, S. S. Zabrodsky, Fizmatgiz, Moscow (1963). Translation editor F. A. Zenz, Massachusetts Institute of Technology Press, Cambridge, Massachusetts (1967)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 13 (1967), S. 210-413 
    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.690130202
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  • 5
    Electronic Resource
    Electronic Resource
    Fluidised particles, J. F. Davidson and D. Harrison, Cambridge University Press, New York (1963). 155 pages. $6.50 (1964)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 10 (1964), S. 783-785 
    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.690100503
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  • 6
    Electronic Resource
    Electronic Resource
    Rates of flow through microporous solids (1958)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 4 (1958), S. 90-96 
    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: Rates of flow of pure gases, both those with no adsorption and those with appreciable adsorption, were studied as a function of pressure level, pressure drop, and temperature for flow through 1/2-in.-diameter cylindrical plugs of activated carbon and of unsintered Vycor glass. Adsorption isotherms for the pure gases on Vycor glass were measured over the range of variables covered in the flow studies. A few measurements were made for bulk liquid flowing through a Vycor plug.Permeabilities, which are proportional to the rate of flow per unit of pressure drop, were satisfactorily correlated for hydrogen, helium, argon, and nitrogen by employing existing gas-phase flow theory. Permeabilities considerably larger than the values predicted from the nonadsorbed gas correlation, sometimes more than seventeen times as large, were observed for ethylene, propylene, and isobutane flowing through a Vycor plug. For the hydrocarbon-Vycor systems, permeabilities for vapor flow are as much as sixty times larger than for bulk liquid flow.The unusual flow phenomena for the hydrocarbon-Vycor systems are attributed to a rapid transport in the adsorbed layer. The total transport is treated as being the sum of gas-phase and adsorbed-layer flow. An equation describing adsorbed-layer movement is derived by utilizing a force balance together with thermodynamic principles. The resulting equation has just one empirical constant, and its use requires adsorption-isotherm data. It correlates very well the surface flow rates for the major range of the variables covered in this investigation. Rate measurements were made for adsorbed-layer concentrations ranging from about one tenth of a monolayer up through the capillary condensation region. Deviations in the one constant form of the equation are observed below one tenth of a monolayer. The available literature data on flow in adsorbed layers are reasonably well correlated by the same equation.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690040117
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  • 7
    Electronic Resource
    Electronic Resource
    Rubber-filler interactions: Solution adsorption studies (1960)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 3 (1960), S. 26-42 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: To help explain the mechanism of rubber reinforcement, studies of equilibrium adsorption from benzene solution of several polyisobutylenes and of a butyl rubber onto a high abrasive furnace black and other fillers were made. The adsorption is essentially physical in nature. On a weight basis, it decreases with increasing temperature in the range 25-75°C., is unaffected by unsaturation of the polymer, and increases with concentration in the range 0.25-1% for the lower molecular weight polymers and with increasing molecular weight (but above about 500,000 the effect is small). Adsorption of the higher molecular weight polymers is unaffected by concentration. Adsorption by the more polar, oxygenated channel blacks or by the highly polar, inorganic Hi-Sil is negligible. The higher molecular weight species are preferentially adsorbed to such an extent that apparently reliable molecular weight distribution curves can be obtained from these simple equilibrium experiments. Milling studies show that a high molecular weight polymer can be softened by a filler.
    Additional Material: 18 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1960.070030704
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  • 8
    Electronic Resource
    Electronic Resource
    Irradiation grafting of styrene to high pressure and low pressure polyethylene filmsWork accomplished as part of Sc.d. Thesis of A. S. Hoffman Department of Chemical Engineering, Massachusetts Institute of Technology, September, 1957. (1959)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 34 (1959), S. 461-480 
    Details
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The cobalt-60 gamma irradiation of high pressure and low pressure (Marlex-50) polyethylene films immersed in styrene monomer to produce graft Polymers was studied as a function of dose, temperature, and film thickness. It was found that grafting generally increased with dose, but reached a level for all films at 10-20°C. and an average dose rate of 228,000 rad/hr., where the grafting was higher for the thinnest films (1.5-2 mils) than the thicker films (up to 20 mils). At 40 and 70°C. and an average dose rate of 93,500 rad/hr., the grafting increased approximately linearly with dose for all films. The post-effects were also studied and found to be more significant for higher film thickness, higher Polymer crystallinities, and lower temperatures. Observations of the hetergeneity found in the grafted films were described, photos were shown, and these effects were discussed. It was concluded that for the dose rates employed, grafting was probably diffusion-controlled for all films at 10-20°C. and perhaps for the thicker films at 40°C. The effects of changes in the various independent and dependent variables on the grafting mechanism were discussed and a qualitative picture of this mechanism was described. It was then concluded that the different polycrystalline natures and different thicknesses of the films (as they affected the monomer diffusion rate), and the dose rate or rate of initiation of free radicals were among the most important factors in determining the mechanism and resultant efficiency of grafting.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1959.1203412734
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