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Study of transport of pure and mixed CO 2 /N 2 gases through polymeric membranes
Author(s) -
Yeom C. K.,
Lee S. H.,
Lee J. M.
Publication year - 2000
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/1097-4628(20001003)78:1<179::aid-app220>3.0.co;2-z
Subject(s) - permeation , solubility , sorption , membrane , chemistry , diffusion , permeability (electromagnetism) , chemical engineering , analytical chemistry (journal) , materials science , chromatography , thermodynamics , organic chemistry , adsorption , biochemistry , engineering , physics
The permeations of pure CO 2 and N 2 gases and a binary gas mixture of CO 2 /N 2 (20/80) through poly(dimethylsiloxane) (PDMS) membrane were carried out by the new permeation apparatus. The permeation and separation behaviors were characterized in terms of transport parameters, namely, permeability, diffusion, and solubility coefficients which were precisely determined by the continuous‐flow technique. In the permeation of the pure gases, feed pressure and temperature affected the solubility coefficients of CO 2 and N 2 in opposite ways, respectively; increasing feed pressure positively affects CO 2 solubility coefficient and negatively affects N 2 solubility coefficient, whereas increasing temperature favors only N 2 sorption. In the permeation of the mixed gas, mass transport was observed to be affected mainly by the coupling in sorption, and the coupling was analyzed by a newly defined parameter permeation ratio. The coupling effects have been investigated on the permeation and separation behaviors in the permeation of the mixed gas varying temperature and feed pressure. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 78: 179–189, 2000