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Gas separation with porous anisotropic polymer films
Author(s) -
Bradley D. F.,
Baker R. W.
Publication year - 1971
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760110404
Subject(s) - membrane , materials science , gas separation , knudsen diffusion , permeation , ultrafiltration (renal) , chemical engineering , porosity , polymer , synthetic membrane , gaseous diffusion , porous medium , chromatography , composite material , chemistry , fuel cells , biochemistry , engineering
The utility of anisotropic ultrafiltration membranes in gas separation has been examined. These membranes consist of a thin (0.2‐2μ) barrier layer supported upon a more porous supporting substructure. Gases permeate these membranes by a Knudsen diffusion mechanism. Permeabilities from 0.1 to 0.4 cm sec −1 cm Hg −1 were obtained. These values are 10 4 to 10 5 higher than most conventional gas separation membranes. These membranes may be useful in several gas separation processes.