Dynamics of Mass Transfer in the Double Film Resistance

Abstract

The reasonability of using a constant mass transfer capacity coefficient based on the “double film theory” for the dynamic analysis of mass transfer is discussed from a point of view of diffusion equation in films, and it is concluded that for ordinary operating condition of mass transfer, the dynamics obtained in this detailed analysis may be almost identical with those which are obtained under the assumption of a constant mass transfer capacity coefficient during an unsteady state condition concerning concentration change.