Mixture permeability, solubility, and diffusivity in vapor selective polymers

Roy D. Raharjo, Benny D. Freeman, Edgar S. Sanders

Research output: Chapter in Book/Report/Conference proceedingConference PaperOther


The permeability, solubility, and diffusivity of n-C4H10/CH4 mixed gas in vapor selective polymers at -20°-50°C are presented. The dilation isotherms are also presented to complement the mixture sorption data. In rubbery poly(dimethylsiloxane), the presence of larger, more condensable n-C4H10 considerably improved the CH4 solubility, permeability, and diffusivity in the polymer. On the other hand, the n-C4H10 sorption and transport properties in mixtures were unaffected by the presence of CH4 and were similar to those observed under pure gas conditions. The overall n- C4H10/CH4 permeability selectivity in mixtures increased as n- C4H10 activity increased and as temperature decreased, and the selectivity was lower than that estimated from pure gas measurements. The overall selectivity in PDMS was governed by solubility selectivity. This is an abstract of a paper presented at the 2006 AIChE National Meeting (San Francisco, CA 11/12-17/2006).

Original languageEnglish
Title of host publication2006 AIChE Annual Meeting
ISBN (Print)081691012X, 9780816910120
Publication statusPublished - 2006
Externally publishedYes
Event2006 AIChE Annual Meeting - San Francisco, United States of America
Duration: 12 Nov 200617 Nov 2006


Conference2006 AIChE Annual Meeting
Country/TerritoryUnited States of America
CitySan Francisco

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