Home Chemical • Download Mass Transfer with Chemical Reaction in Multiphase Systems: by Erdogan Alper (auth.), Erdoğan Alper B.Sc., Ph.D. (Cantab) PDF

Download Mass Transfer with Chemical Reaction in Multiphase Systems: by Erdogan Alper (auth.), Erdoğan Alper B.Sc., Ph.D. (Cantab) PDF

By Erdogan Alper (auth.), Erdoğan Alper B.Sc., Ph.D. (Cantab) (eds.)

The phenomenon of "mass move with chemical response" occurs at any time when one section is introduced into touch with a number of different levels now not in chemical equilibrium with it. This phenomenon has commercial, organic and physiological value. In chemical procedure engineering, it really is encountered in either separ­ ation approaches and response engineering. in certain cases, a chemical response may possibly intentionally be hired for rushing up the speed of mass move and/or for expanding the means of the solvent; in different situations the multiphase response method is part of the method with the explicit goal of product formation. ultimately, every now and then, for example "distillation with chemical reaction", either targets are concerned. even if the topic is obviously a chemical engineering undertakin~, it calls for frequently a great knowing of alternative topics, reminiscent of chemistry and fluid mechanics etc., resulting in courses in assorted components. at the different har.d, the topic has regularly been an important box and some of the most fruitful for chemical engineers.

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Read or Download Mass Transfer with Chemical Reaction in Multiphase Systems: Volume I: Two-Phase Systems. Volume II: Three-Phase Systems PDF

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Extra info for Mass Transfer with Chemical Reaction in Multiphase Systems: Volume I: Two-Phase Systems. Volume II: Three-Phase Systems

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Battino. Techniques of Chemistry Series vol. 8, part 1. ), Wiley, New York, 1975), p. 379 33. Andrieu,J. Smith. "Gas-liquid reactions in chromatographic columns". Jl. 20 (1980) 211-218. 34. Sha rma ,N. M. and P. V. Danckwerts. Eng. 15 (1970) 522-528. 35. Alper,E. "r~easurement of effective interfacial area in a packed-column absorber by chemical methods". Trans. Chem. Engrs. 57 (1979) 64-68. 36. Alper,E. "Absorption with chemical reaction: Design methods and effect of viscosity for packed columns".

Usually the components ~j are non-volatile, so that all the chemical reactions take place ln the liquid phase. The occurrence of the chemical reactions has two distinct effects on the overall behavior of the system. The first one is, for the case of absorption, as follows. When component A is absorb ed into the liquid phase, it is consumed by the chemical reactions and therefore its concentration in the bulk of the liquid, a , is kept low. This in turn implies that the driving force for ad~itio~ al absorption remains higher than it would be if no chemical reaction were taking place.

L; a "chemical" mass transfer coefficient, kL, can be defined as follows : N m kL (a. - a ) 1 0 ( 2) The rate enhancement factor, I, is defined as the ratio of the actual rate and the rate which would be observed under the same driving force in the absence of chemical reactions : N kL (3) 19 It is important to realize that the value of the mass transfer coefficient k~ is determined by the fluid mechanics of the liquid phase in the neighborhood of the gas-liquid interface, and in fact that its value cannot in general be predicted from first princl pIes due to the complexity of the fluid mechanics problem involved.

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