Journal article
Influence of toluene on CO2 and CH4 gas transport properties in thermally rearranged (TR) polymers based on 3,3'-dihydroxy-4,4'-diamino-biphenyl (HAB) and 2,2'-bis-(3,4-dicarboxyphenyl) hexafluoropropane dianhydride (6FDA)
Q Liu, M Galizia, KL Gleason, CA Scholes, DR Paul, BD Freeman
Journal of Membrane Science | ELSEVIER | Published : 2016
Abstract
Separation of complex gas mixtures, such as natural gas using polymer membranes, often involves components with a wide range of condensabilities and propensity to interact with the polymer, potentially changing the transport properties of all components. There are few studies of such phenomena in the open literature. Here, the influence of toluene, a surrogate aromatic contaminant in natural gas, on pure and mixed CO2 and CH4 gas transport properties at 35 °C was investigated for a thermally rearranged (TR) polymer prepared from a polyimide precursor based on 3,3'-dihydroxy-4,4'-diamino-biphenyl (HAB) and 2,2'-bis-(3,4-dicarboxy-phenyl) hexafluoropropane dianhydride (6FDA). As the polymer wa..
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Funding Acknowledgements
This study was partially supported by the U.S. Department of Energy Office of Science, Office of Basic Energy Sciences under Award Number DE-FG02-02ER15362. Financial support from the NSF Science and Technology Center for Layered Polymeric Systems (Grant No. 0423914) is also gratefully acknowledged. The authors would also like to acknowledge Air Products and Chemicals, Inc. for their financial support. This study was also partially supported by the International Institute for Carbon Neutral Energy Research (WPI-I<SUP>2</SUP>CNER), sponsored by the Japanese Ministry of Education, Culture, Sports, Science and Technology. The authors would like to acknowledge Dr. Frank Seibert (UT Austin) for recommending the use of Pro-pak (R) distillation packing for the mixed gas/vapor permeation apparatus.