It is my pleasure to honor a professional colleague of over 4 decades (Les Sperling) in this symposium.  This presentation will review the analysis of a comprehensive database of polymer permeability, diffusivity and solubility for common gases related to membrane separation.  The analysis is directed towards understanding the upper bound performance of membrane materials and is a summary of results published with colleagues at the University of Texas (Freeman, Paul and students).  Diffusivity selectivity and solubility selectivity trends relating to permeability selectivity show changes related to fee volume.  The results reveal glassy polymers dominate upper bound performance due to higher gas solubility compared to rubbery polymers instead of the widely believed diffusivity selectivity.  A unique set of gas diameters related to gas diffusion in polymers has been determined from this analysis.  The specific characteristics of polymers with upper bound performance will be presented.

Analysis of fundamental properties for membrane separation

254th National Meeting (2017)

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