Poly(1-trimethylsilyl-1-propyne)/MFI composite membranes for butane separations

M. Woo, J. Choi, M. Tsapatsis

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

The separation of equimolar mixtures of i-butane and n-butane through poly(1-trimethylsilyl-1-propyne)/MFI composite membranes was studied. Membranes were characterized by XRD and SEM. Addition of 50 wt% MFI particles into a PTMSP matrix showed increased permeability and simultaneous improved selectivity in the temperature range 25-200 °C. The best improvement was seen at 150 °C for the composites, giving almost threefold increase in permeability and 56% higher n-butane/i-butane selectivity over the pure polymer. To our knowledge, this is the first successful demonstration of the incorporation of a molecular sieve into a polymer matrix for butane isomer separations. The composite membranes were also tested for separations of n-hexane/2,2-dimethylbutane and p-xylene/o-xylene.

Original languageEnglish
Pages (from-to)330-338
Number of pages9
JournalMicroporous and Mesoporous Materials
Volume110
Issue number2-3
DOIs
Publication statusPublished - 2008 Apr 15
Externally publishedYes

Keywords

  • Hybrid materials
  • Membranes
  • Permeation properties
  • Poly(1-trimethylsilyl-1-propyne)
  • Zeolites

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials

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