Collect. Czech. Chem. Commun. 1979, 44, 475-487

Approximate relations for calculation of enhancement factor in gas absorption with chemical reaction

Miloš Mareka and Jiří Schöngutb

a Department of Chemical Engineering, Prague Institute of Chemical Technology, 166 28 Prague 6
b Chemopetrol, Research Institute of Hydrocarbon Utilization, 436 00 Litvinov


Based on the film theory of mass transport, new approximate relations for reaction factor are developed for gas absorption accompanied by irreversible chemical reaction A (g) + zB (l) → products. The relations are compared with exact numerical solutions obtained by the commonly used method of linearization (suggested by Van Krevelen and Hoftijzer and applied by Hikita and Asai) for several nonlinear reaction rate cases. The effect of mass transfer resistance in the gas phase is also considered and simple criteria for estimation of magnitude of the effect of chemical reaction on mass transport are given. It is shown, that the error of the new approximate method is several percent even in cases, where the error of the linearization method is high.