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Facilitated transport of CO 2 in ion exchange membranes
Author(s) -
Way J. D.,
Noble R. D.,
Reed D. L.,
Ginley G. M.,
Jarr L. A.
Publication year - 1987
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690330313
Subject(s) - membrane , chemistry , facilitated diffusion , counterion , zwitterion , flux (metallurgy) , analytical chemistry (journal) , amine gas treating , ion , ion transporter , inorganic chemistry , chromatography , organic chemistry , molecule , biochemistry
The facilitated transport of CO 2 through ion exchange membranes containing organic amine counterions was studied. Steady state CO 2 fluxes were measured from pure gas streams and mixtures with CH 4 . Facilitation factors for CO 2 up to 26.7 were calculated from transport data. Transport measurements were binary mixtures of CO 2 and CH 4 yielded ratios of CO 2 flux to CH 4 flux ranging from 29.0 to 264. Conversion of flux ratios to permeabilities yielded separation factors up to 551 for CO 2 over CH 4 , which are compared to literature data for polymeric membranes. The transport data support a mobile, reactive‐carrier facilitated transport mechanism with a carbamate zwitterion complex. Effective diffusivities for CO 2 and the carrier‐gas complex were determined from transport data. A reaction equilibrium model predicted facilitation factors that were in very good agreement with experimental values. Potential applications are also discussed.