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Title: Development of Practical Supported Ionic Liquid Membranes: A Systematic Approach

Abstract

Supported liquid membranes (SLMs) are a class of materials that allow the researcher to utilize the wealth of knowledge available on liquid properties to optimize membrane performance. These membranes also have the advantage of liquid phase diffusivities, which are higher than those observed in polymers and grant proportionally greater permeabilities. The primary shortcoming of the supported liquid membranes demonstrated in past research has been the lack of stability caused by volatilization of the transport liquid. Ionic liquids, which may possess high CO2 solubility relative to light gases such as H2, are excellent candidates for this type of membrane since they are stable at elevated temperatures and have negligible vapor pressure. A study has been conducted evaluating the use of a variety of ionic liquids in supported ionic liquid membranes for the capture of CO2 from streams containing H2. In a joint project, researchers at the University of Notre Dame synthesized and characterized ionic liquids, and researchers at the National Energy Technology Laboratory incorporated candidate ionic liquids into supports and evaluated membrane performance for the resulting materials. Several steps have been taken in the development of practical supported ionic liquid membranes. Proof-of-concept was established by showing that ionic liquids could bemore » used as the transport media in SLMs. Results showed that ionic liquids are suitable media for gas transport, but the preferred polymeric supports were not stable at temperatures above 135oC. The use of cross-linked nylon66 supports was found to produce membranes mechanically stable at temperatures exceeding 300oC but CO2/H2 selectivity was poor. An ionic liquid whose selectivity does not decrease with increasing temperature was needed, and a functionalized ionic liquid that complexes with CO2 was used. An increase in CO2/H2 selectivity with increasing temperature over the range of 37 to 85oC was observed and the dominance of a facilitated transport mechanism established. The presentation will detail membrane development, the effect of increasing transmembrane pressure, and preliminary results dealing with other gas pairs and contaminants.« less

Authors:
; ; ;
Publication Date:
Research Org.:
National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV, and Albany, OR
Sponsoring Org.:
USDOE - Office of Fossil Energy (FE)
OSTI Identifier:
936313
Report Number(s):
DOE/NETL-IR-2008-036; NETL-TPR-1771
TRN: US200818%%653
DOE Contract Number:  
None cited
Resource Type:
Conference
Resource Relation:
Conference: 2007 AIChE Annual Meeting, Salt Lake City, UT, Nov. 4-9, 2007
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; SUPPORTED LIQUID MEMBRANES; HYDROGEN; CARBON DIOXIDE; MEMBRANE TRANSPORT; MATERIALS TESTING; PERFORMANCE TESTING

Citation Formats

Luebke, D R, Ilconich, J B, Myers, C R, and Pennline, H W. Development of Practical Supported Ionic Liquid Membranes: A Systematic Approach. United States: N. p., 2007. Web.
Luebke, D R, Ilconich, J B, Myers, C R, & Pennline, H W. Development of Practical Supported Ionic Liquid Membranes: A Systematic Approach. United States.
Luebke, D R, Ilconich, J B, Myers, C R, and Pennline, H W. 2007. "Development of Practical Supported Ionic Liquid Membranes: A Systematic Approach". United States. https://www.osti.gov/servlets/purl/936313.
@article{osti_936313,
title = {Development of Practical Supported Ionic Liquid Membranes: A Systematic Approach},
author = {Luebke, D R and Ilconich, J B and Myers, C R and Pennline, H W},
abstractNote = {Supported liquid membranes (SLMs) are a class of materials that allow the researcher to utilize the wealth of knowledge available on liquid properties to optimize membrane performance. These membranes also have the advantage of liquid phase diffusivities, which are higher than those observed in polymers and grant proportionally greater permeabilities. The primary shortcoming of the supported liquid membranes demonstrated in past research has been the lack of stability caused by volatilization of the transport liquid. Ionic liquids, which may possess high CO2 solubility relative to light gases such as H2, are excellent candidates for this type of membrane since they are stable at elevated temperatures and have negligible vapor pressure. A study has been conducted evaluating the use of a variety of ionic liquids in supported ionic liquid membranes for the capture of CO2 from streams containing H2. In a joint project, researchers at the University of Notre Dame synthesized and characterized ionic liquids, and researchers at the National Energy Technology Laboratory incorporated candidate ionic liquids into supports and evaluated membrane performance for the resulting materials. Several steps have been taken in the development of practical supported ionic liquid membranes. Proof-of-concept was established by showing that ionic liquids could be used as the transport media in SLMs. Results showed that ionic liquids are suitable media for gas transport, but the preferred polymeric supports were not stable at temperatures above 135oC. The use of cross-linked nylon66 supports was found to produce membranes mechanically stable at temperatures exceeding 300oC but CO2/H2 selectivity was poor. An ionic liquid whose selectivity does not decrease with increasing temperature was needed, and a functionalized ionic liquid that complexes with CO2 was used. An increase in CO2/H2 selectivity with increasing temperature over the range of 37 to 85oC was observed and the dominance of a facilitated transport mechanism established. The presentation will detail membrane development, the effect of increasing transmembrane pressure, and preliminary results dealing with other gas pairs and contaminants.},
doi = {},
url = {https://www.osti.gov/biblio/936313}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Nov 01 00:00:00 EDT 2007},
month = {Thu Nov 01 00:00:00 EDT 2007}
}

Conference:
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