Corrections for analytical gas-permeation models for separation of binary gas mixtures using membrane modules

Corrected solutions for analytical models, originally presented by Rautenbach and Dahm [1], for membrane-based binary gas separation are presented. These models are based on constant pressure in the feed and permeate streams and perfect-mixing in the permeate stream. A comparison of these models with more complete numerical solutions suggests that the analytical models provide excellent short-cut, preliminary design information. The analytical solutions may also be used to assist convergence of more complete numerical methods.