Kinetics of Nonequimolar Mass Transfer in Multicomponent Gas (Vapor)–Liquid Systems

Abstract

Transformation of the velocity and concentration profiles in a diffusion boundary layer in the presence of a transverse mass flow through the interface complicates the use of widely known phenomenological relationships in the description of diffusion mass flows. Taking this into consideration, a new formulation of the mass-transfer equation has been proposed that adequately describes the mass transfer in binary and multicomponent mixtures. It has been shown that the new structure of the mass-transfer equation is in good agreement with the experimental data for a large variety of separation processes in the gas (vapor)–liquid systems (evaporation, condensation, distillation, etc.), as well as with the similarity criteria specially introduced for taking into consideration transverse mass flows. The versatility and adequacy of the proposed configuration of the mass-transfer equation has been proved.