Premium
A highly selective polybenzimidazole‐4,4′‐(hexafluoroisopropylidene)bis(benzoic acid) membrane for high‐temperature hydrogen separation
Author(s) -
Choi Sun Hee,
Kim Da Hye,
Kim Do Young,
Han Jun Young,
Yoon Chang Won,
Ham Hyung Chul,
Kim JinHo,
Kim HyoungJuhn,
Nam Suk Woo,
Lim TaeHoon,
Han Jonghee
Publication year - 2015
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.42371
Subject(s) - membrane , permeation , gas separation , benzoic acid , polymer chemistry , selectivity , permeability (electromagnetism) , hydrogen , semipermeable membrane , chemical engineering , polymer , materials science , chemistry , organic chemistry , catalysis , biochemistry , engineering
A polymeric gas separation membrane utilizing polybenzimidazole based on 4,4′‐(hexafluoroisopropylidene)bis(benzoic acid) was prepared. The synthesized membrane has an effective permeating area of 8.3 cm 2 and a thickness of 30 ± 2 µm. Gas permeation properties of the membrane were determined using H 2 , CO 2 , CO, and N 2 at temperatures ranging from 24°C to 200°C. The PBI‐HFA membranes not only exhibited excellent H 2 permeability, but it also displayed superior gas separation performance particularly for H 2 /N 2 and H 2 /CO 2 . The permeation parameters for both permeability and selectivity [ P H 2and α(H 2 /N 2 );P H 2and α(H 2 /CO 2 )] obtained for the new material were found to be dependent on trans‐membrane pressure difference as well as temperature, and were found to surpass those reported by Robeson in 2008. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 42371.