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Gas permeability of wet cation exchange membranes

Authors
Journal
Gas Separation & Purification
0950-4214
Publisher
Elsevier
Publication Date
Volume
4
Issue
4
Identifiers
DOI: 10.1016/0950-4214(90)80039-n
Keywords
  • Membranes
  • Gas Permeability
  • Ion-Exchange

Abstract

Abstract The permeation of CO 2 across a Nafion cation exchange membrane in different hydrated forms is studied. The water solvent linked to the ion exchanging sites of the charged membranes forms a liquid supported membrane in which the transport of the polar gas is enhanced. This effect is still higher when the dry membrane is swollen in a Li 2CO 3 solution which increases the carbonate/bicarbonate anion concentration in the wet membranes and reduced the effectiveness of the Donnan co-ion exclusion from the membrane phase.

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