Transmembrane gas transfer through a two-layer membrane

Gas diffusion through a two-layer membrane is studied within the lattice model of an ideal gas. Analytical expressions are derived for transmembrane diffusion gas flux and permeability of the membrane. It is revealed that the value of the transmembrane gas flux may depend on the membrane orientation...

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Bibliographic Details
Published inColloid journal of the Russian Academy of Sciences Vol. 77; no. 4; pp. 520 - 524
Main Author Ugrozov, V. V.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 01.07.2015
Subjects
Chemistry
Chemistry and Materials Science
Polymer Sciences
Surfaces and Interfaces
Thin Films
Sorption Isotherm
Composite Membrane
Layer Membrane
Colloid Journal
Diffusion Transfer
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Summary:Gas diffusion through a two-layer membrane is studied within the lattice model of an ideal gas. Analytical expressions are derived for transmembrane diffusion gas flux and permeability of the membrane. It is revealed that the value of the transmembrane gas flux may depend on the membrane orientation. An expression is obtained for the asymmetry coefficient of diffusion gas transfer. It is shown that the revealed effect of asymmetry of membrane diffusion permeability arises in the case of nonlinear sorption isotherms. The results obtained can be used to predict the separating characteristics of composite membranes.
ISSN:1061-933X
1608-3067
DOI:10.1134/S1061933X15040195