Mechanisms of Gas Separation by Membrane

During the last decades, membrane processes have been widely considered all over the world for their high potential and excellent performance in various applications such as gas separation. A large number of researchers have focused their efforts on developing and modifying a new generation of membranes to reach the industrial stage. For this purpose, it is essential to identify the various mechanisms in gas separation by membranes. In general, two mechanisms can be assumed for gas separation including solution- diffusion and pore flow mechanisms. The first mechanism is used for non-porous membranes and the other one, which can be divided into several mechanisms, is related to porous membranes. In this study these mechanisms will be introduced, described and discussed.