Permeation characteristics of butane isomers through MFI-type zeolitic membranes

Takaaki Matsufuji, Norikazu Nishiyama, Korekazu Ueyama, Masahiko Matsukata*

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

31 Citations (Scopus)


MFI-type◆ zeolitic membranes were prepared by a vapor-phase transport method on porous α-alumina flat disks. Pure or mixed gas permeation measurements of butane isomers were performed at 375 K using two methods: pressure gradient (PG) and concentration gradient (CG) methods. Pure gas permeation measurements of H2, He, CH4, N2, O2, CO2 and SF6 were also carried out using PG method. Counter-diffusion of helium as a sweep gas was evaluated by determining the gas composition at the outlet of the feed side. It was confirmed that the counter-diffusion of helium occurs only when the total pressure of the feed side was <80kPa. In the mixed gas permeation measurements, the value of separation factor depended on the method of gas permeation. The separation factors of n-butane to i-butane were ca. 10 in the PG method and 30-60 in the CG method.

Original languageEnglish
Pages (from-to)265-273
Number of pages9
JournalCatalysis Today
Issue number1-3
Publication statusPublished - 2000 Feb 25
Event3rd International Conference on Catalysis in Membrane Reactors (ICCMR 98) - Copenhagen, Denmark
Duration: 1998 Sept 81998 Sept 10


  • Butane isomers
  • Concentration gradient
  • Pressure gradient
  • Zeolitic membranes

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)


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