Gas absorption with consecutive second‐order reactions

Abstract

SCOPEThe reaction (enhancement) factor, which shows the effect of chemical reaction on the rate of gas absorption, is of importance in the design of gas-liquid reactors (Hoffman et al., 1975;Sharma et al., 1976;Raghuram and Shah, 1977; Charpentier, 1978). In modeling gas-liquid reactors, it is usually preferable to use the reaction factor rather Correspondence should be addressed to A Vama

Mass transfer with complex chemical reaction in gas–liquid systems—I. Consecutive reversible reactions with equal diffusivities

“…The simplest form of consecutive reactions with unit stoichiometric and kinetic orders has been studied earlier by co-workers (1970, 1972). The same system was numerically investigated by Huang et al (1980).…”

“…This can be attributed to the use of the penetration theory for the numerical calculations while the Onda solution is based on the film theory. It is known that the difference in the two theories, for the case of equal diffusivities, is negligible at infinite enhancement and is more pronounced at lower Hatta numbers (Huang et al, 1980). Another reason for the deviation is the assumption of the concentration profile of B made by Onda et al on which the value of B G is based.…”

“…Both solutions generate negligible deviations at the intermediate asymptotic enhancement factor. Huang, et al (1980) Huang et al (1980 studied the influence of consecutive irreversible second-order reactions on liquid phase mass transfer. They described this system using, both, the film and penetration theory.…”

“…Approximate solutions for the enhancement factor have been provided by Onda et al (1970Onda et al ( , 1972, who derived semi-analytical solutions for the film and penetration theory for the case where both reaction steps may be considered irreversible. A more detailed description of the absorption rate for the case presented by Onda (1970Onda ( , 1972 was provided by Huang et al (1980), who presented quantitative values of enhancement factors over a range of Hatta numbers using both film and penetration theory solutions. They observed that the difference in the enhancement factors obtained from the two theories was always less than 2%.…”

Gas-Liquid Reactors With Volatile Liquid Reactants: Approximate Solution for Consecutive Bimolecular Reactions of General Order

“…(4) and (5). In the latter case, the orthogonal collocation method on finite elements (Villadsen and Michelsen, 1978) was used, as reported in detail by Huang et al (1980) and Morbidelli et al (1984a).…”