A nonideal model for analysis of gas separation permeators

Abstract A nonideal model is developed for analysis of gas separation permeators. The model is based on the ideal solution assumption. The material balance equations are those for a binary system in a plug-flow configuration. The study includes comparison between the predictions of the ideal and nonideal models. Results are presented in terms of effect of major operating and design parameters on stage cut and product composition. The studied parameters include pressure drop across the membrane, feed flow rate and composition, and membrane area. Over the selected range of operating conditions, the nonideal model predicts lower stage cuts and higher permeate enrichment, reject depletion, and permeation area. Results show large differences between the two models, with deviations up to 12% in stage cut, 36% in permeate enrichment, 80% in reject depletion, and 30% in permeation area.