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Gas permeation and separation properties of polyimide/ZSM‐5 zeolite composite membranes containing liquid sulfolane
Author(s) -
Kanehashi Shinji,
Gu Hua,
Shindo Ryohei,
Sato Shuichi,
Miyakoshi Tetsuo,
Nagai Kazukiyo
Publication year - 2012
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.38572
Subject(s) - sulfolane , membrane , polyimide , selectivity , permeation , zeolite , gas separation , materials science , composite number , chemical engineering , solvent , polymer chemistry , chemistry , composite material , organic chemistry , layer (electronics) , catalysis , biochemistry , engineering
The preparation, characterization, and gas permeation properties of novel composite membranes containing polyimide (PI), liquid sulfolane (SF), and zeolite (ZSM‐5) were investigated to address the interface defects between the PI and the zeolite. The free‐standing composite membranes were prepared by the solvent casting method. The gas permeability of the PI+ZSM‐5 membrane was higher than that of PI, whereas its gas selectivity was significantly reduced, suggesting that these results are attributed to the interface defects. The CO 2 selectivity of PI+ZSM‐5+SF was higher than those of the PI+ZSM‐5 membranes because of the introduction of liquid SF into the interface defects. Furthermore, liquid SF enhanced the CO 2 /H 2 selectivity near the recent upper bound. Therefore, the use of liquid SF could be an effective approach to preventing interface defects and increasing the CO 2 selectivity, particularly for CO 2 /H 2 . © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013