Premium
Gas absorption with exothermic bimolecular (1,1 order) reaction
Author(s) -
Bhattacharya A.,
Gholap R. V.,
Chaudhari R. V.
Publication year - 1987
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690330910
Subject(s) - exothermic reaction , isothermal process , thermodynamics , absorption (acoustics) , chemistry , order of reaction , heat generation , dissipation , reaction rate , multiplicity (mathematics) , kinetics , reaction rate constant , physics , optics , organic chemistry , quantum mechanics , catalysis , mathematical analysis , mathematics
Gas absorption with a nonisothermal, bimolecular (1,1 order), and irreversible reaction are analyzed and approximate film theory solutions are obtained for interfacial temperature rise and enhancement factor. The model of Mann and Moyes is extended to incorporate depletion of liquid reactant concentration at the gas‐liquid interface and also the variation of dissolved gas concentration in the bulk liquid, leading to a generalized solution independent of the regime of absorption. The effect of heat generation, heat dissipation, and reaction rate parameters on enhancement factor and interfacial temperature rise is discussed. The system showed multiplicity behavior under certain conditions, but at higher values of heat dissipation parameters and for some combinations of heat generation and reaction rate parameters, unique solutions were obtained. However, even the unique solutions of enhancement factor are substantially different from the values obtained under isothermal conditions. Since depletion of liquid reactant concentration is incorporated, asymptotic values of enhancement factor (at large \documentclass{article}\pagestyle{empty}\begin{document}$ \sqrt M $\end{document} ) were observed to be the same as those obtained in the instantaneous reaction regime of isothermal absorption and reaction process. The model presented does not require a priori assumption of the regime of absorption and hence can be useful in modeling nonisothermal reactors.