A highly selective polybenzimidazole-4,4′-(hexafluoroisopropylidene)bis(benzoic acid) membrane for high-temperature hydrogen separation

Sun Hee Choi, Da Hye Kim, Do Young Kim, Jun Young Han, Chang Won Yoon, Hyung Chul Ham, Jin Ho Kim, Hyoung Juhn Kim, SukWoo Nam, Tae Hoon Lim, Jonghee Han

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7 Citations (Scopus)

Abstract

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<sup>2</sup> and a thickness of 30 ± 2 μm. Gas permeation properties of the membrane were determined using H<inf>2</inf>, CO<inf>2</inf>, CO, and N<inf>2</inf> at temperatures ranging from 24°C to 200°C. The PBI-HFA membranes not only exhibited excellent H<inf>2</inf> permeability, but it also displayed superior gas separation performance particularly for H<inf>2</inf>/N<inf>2</inf> and H<inf>2</inf>/CO<inf>2</inf>. The permeation parameters for both permeability and selectivity [ PH2 and α(H<inf>2</inf>/N<inf>2</inf>); PH2 and α(H<inf>2</inf>/CO<inf>2</inf>)] 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.

Original languageEnglish
Article number42371
JournalJournal of Applied Polymer Science
Volume132
Issue number32
DOIs
Publication statusPublished - 2015 Aug 1

Keywords

  • membranes
  • properties and characterization
  • separation techniques

ASJC Scopus subject areas

  • Materials Chemistry
  • Polymers and Plastics
  • Surfaces, Coatings and Films
  • Chemistry(all)

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  • Cite this

    Choi, S. H., Kim, D. H., Kim, D. Y., Han, J. Y., Yoon, C. W., Ham, H. C., Kim, J. H., Kim, H. J., Nam, S., Lim, T. H., & Han, J. (2015). A highly selective polybenzimidazole-4,4′-(hexafluoroisopropylidene)bis(benzoic acid) membrane for high-temperature hydrogen separation. Journal of Applied Polymer Science, 132(32), [42371]. https://doi.org/10.1002/app.42371