Journal
SEPARATION SCIENCE AND TECHNOLOGY
Volume 40, Issue 13, Pages 2697-2707Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/01496390500285311
Keywords
diffusion coefficients; diffusivity selectivity; permselectivity; pervaporation; solubility selectivity; Torlon; vapor permeation
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In the present study, vapor permeation and pervaporation of aqueous 2-propanol mixtures were investigated using Torlon (R) poly(amide imide) as a membrane material. Torlon membranes preferentially permeated H2O from aqueous 2-PrOH mixtures both by vapor permeation and pervaporation. Diffusion experiments led to the conclusion that both solubility selectivity and diffusivity selectivity showed a preference for H2O. Solubility selectivity is by far the dominant factor governing permselectivity, and as a result, Torlon membranes showed permselectivity toward water in vapor permeation and pervaporation. The present study showed that Torlon (R) poly(amide imide) is a membrane material potentially applicable to the dehydration of water miscible organics.
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