Experimental investigation of the permeability and selectivity of supported ionic liquid membranes for CO2/He separation at temperatures up to 125°C

Supported liquid membranes have been prepared by impregnation of commercial porous polymer films with the ionic liquid 1-n-hexyl-3- methylimidazolium bis(trifluoromethanesulfonyl)imide. The ionic liquid has been characterized, and the membranes have been tested to determine performance in the select...

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Bibliographic Details
Published in:Journal of membrane science 2007-07, Vol.298 (1-2), p.41-47
Main Authors: Ilconich, Jeffery, Myers, Christina, Pennline, Henry, Luebke, David
Format: Article
Language:English
Subjects:
CARBON DIOXIDE
Diffusivity
ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
HELIUM
IMPREGNATION
Ionic liquid
MEMBRANE TRANSPORT
Membranes
PERMEABILITY
POLYMERS
SEPARATION PROCESSES
SUPPORTED LIQUID MEMBRANES
Temperature dependence
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Summary:Supported liquid membranes have been prepared by impregnation of commercial porous polymer films with the ionic liquid 1-n-hexyl-3- methylimidazolium bis(trifluoromethanesulfonyl)imide. The ionic liquid has been characterized, and the membranes have been tested to determine performance in the selective separation of CO2 from He. Experiments were conducted in a constant pressure system, and pure gas permeability/selectivity data are reported. Membranes prepared with polysulfone supports have been found to be stable to 125 °C. The CO2 permeability of the membranes increases from 744 to 1200 barrer as the temperature increases from 37 to 125 °C. The CO2/He selectivity decreased from 8.7 to 3.1 over the same temperature range.
ISSN:0376-7388
1873-3123
DOI:10.1016/j.memsci.2007.03.056