Gas and Vapor Transport in Membranes

Abstract

Mass transfer is a movement of mass from one location to another. Its driving force is a difference in chemical potential and other thermodynamic gradients may accommodate the mass flow. There are similarities in the approximate differential equations for momentum, heat, and mass transfer. The molecular transfer equations of Newton's law for fluid momentum, Reynolds number, Fourier's law for heat, and Fick's law for mass are very similar because they are all linear approximations to transport of quantities. A membrane is an interphase between two adjacent phases acting as a selective barrier, regulating the transport of substances between the two compartments, and is employed for specific fu..