MFI zeolite membranes from a- and randomly oriented monolayers

Jungkyu Choi, Shubhajit Ghosh, Lisa King, Michael Tsapatsis

Research output: Contribution to journalArticlepeer-review

64 Scopus citations


c-Oriented columnar MFI films made by secondary growth of randomly oriented seed monolayers, deposited using sonication-assisted covalent attachment, exhibit n-hexane/2,2-dimethylbutane separation factor of up to 10 4, n-/i-butane separation factor of up to 50, and p-/o-xylene separation factor of up to 2. A MFI film from a-oriented seed layer shows lower separation factors for the linear vs. branched isomers but higher separation factor for p-/o-xylene.

Original languageEnglish (US)
Pages (from-to)339-360
Number of pages22
Issue number5-6
StatePublished - Sep 2006

Bibliographical note

Funding Information:
Acknowledgments Funding from NSF (CTS-0522518) and UOP LLC through IPrime is gratefully acknowledged. All char- acterizations were performed at the University of Minnesota Characterization Facility supported from NSF through the National Nanotechnology Infrastructure Network (NNIN).


  • Butane
  • Hexane
  • MFI
  • Permeation
  • Preferred orientation
  • Separation
  • Xylene
  • Zeolite


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