(27f) Approximate Analytical Film MODEL Solution for Absorption with (m,n) Order Irreversible Gas Liquid Reaction Incorporating Finite Gas Film Resistance and Reaction in Bulk

A general approximate analytical solution of the film model for gas-liquid mass transfer accompanied by an irreversible (m,n) order gas-liquid reaction taking place in the liquid film as well as bulk is developed by extending the HikitaAsai approximation that was originally applied to obtain solution to the fast-depletion regime by Hikita and Asai (1964) to the situation where gas film resistance, diffusion and reaction in the liquid film , and reaction in bulk are all assumed to be significant. Inequality criteria and flux equations are derived for the special situations where one or more of the individual film mass transfer resistances and/or reaction step are controlling. Computational procedures along with examples are given to illustrate the application of the criteria for different regimes of absorption with reaction. A comparison of the accuracy of the approximate solution with the rigorous numerical solution of the film model is also made for all possible regimes ranging from very rapid to very slow reaction rates.