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Effect of toluene adsorption on permeation through SAPO-34 membranes.
- Source :
-
Journal of Membrane Science . Aug2018, Vol. 560, p108-114. 7p. - Publication Year :
- 2018
-
Abstract
- When 0.65 mol% toluene was added to SAPO-34 membrane feeds (172-kPa feed pressure), the CO 2 and N 2 permeances decreased by approximately 50%, even though toluene is too large to diffuse into the SAPO-34 pores. Single-component adsorption isotherms for CO 2 and toluene were used to fit a dual-site Langmuir model to estimate external surface coverages. The lower CO 2 permeances qualitatively correlated with the reduced CO 2 surface coverages. Changes in permeances for 10-kPa feed pressures were also measured so that surface coverages could be estimated more accurately using ideal adsorbed solution theory. The estimated decreases in CO 2 coverages on the membrane surface due to competitively-adsorbed toluene reduced the trans-membrane CO 2 driving force and accounted for the observed decreases in permeance. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 03767388
- Volume :
- 560
- Database :
- Academic Search Index
- Journal :
- Journal of Membrane Science
- Publication Type :
- Academic Journal
- Accession number :
- 129790314
- Full Text :
- https://doi.org/10.1016/j.memsci.2018.05.016