(569dp) Film Theory Solution for Gas Absorption Accompanied By Irreversible (1,1) Order Reactions of a Solute with Two Solvents , Rate Equations and Criteria for Regime Identification

Film model equations for the case of absorption of a single gas phase solute accompanied by simultaneous irreversible reactions of the solute with two reacting solvents are solved for the most general case of the reactions taking place in film and bulk in the presence of a finite gas film resistance and depletion of the concentrations of either or both the solvents by applying the extended Hikita Asai approximation technique(1964) proposed by Bhattacharya et al (1987). Conditions for the validity of specific regimes such as fast pseudo first order regime, and instantaneous reaction regimes are derived which take into account the presence of a finite gas film resistance. Rate equations for a few selected fast regimes of absorption-reaction with two solvents derived by Jhaveri (1969), and Doraiswamy and Sharma( 1984) are found to be in error.

REFERENCES:

1. Bhattacharya, A.; Gholap, R. V,; Chaudhari, R. V. Gas absorption with exothermic bimolecular (1,1) order reaction. AIChE J. 1987,33(9),1507-1513.DOI.org:10.1002/aic.690330910
2. Doraiswamy, L. K., and Sharma , M. M., (1984) “Heterogeneous reactions”, Vol. 2 , Chapter 5.
3. Hikita, H.; and Asai, S. Gas Absorption with (m, n)-th Order Irreversible Chemical Reaction. Int. Chem. Eng. 4, 332, 1964
4. Jhaveri, A. S., (1969) “Absorption of a gas into a solution containing two reactants”, Chem. Eng. Sci., 24. 1738-1740.