Zirconia and alumina supported MFI zeolite membranes: Effects of support materials on membrane properties

Ming Pan, Jun Hang Dong, Yue Sheng Lin

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Good quality MFI type zeolite membranes were prepared on mesoporous Y2O3 doped ZrO2 (YZ) support and macroporous α-Al2O3 support with pure SiO2 precursor by hydrothermal process. Permeation of binary mixture H2/n-C4H10 through zeolite membranes on YZ and α-Al2O3 supports was measured using a multi-component gas permeation set-up. YZ supported zeolite membrane had a much higher n-C4H10 permeance than the α-Al2O3 supported one in the lower temperature range. The maximum n-C4H10 to H2 separation factor of YZ supported zeolite membrane was as high as 500. Pure p-xylene pervaporation through these zeolite membranes was also conducted to study the membranes separation property. The pervaporation flux declined significantly with time for the α- Al2O3supported zeolite membrane. Much less change in pervaporation flux was found for the YZ supported zeolite membrane. XRD was employed to analyze the phase structure of the zeolite membranes. The thermal stability of the YZ and α-Al2O3 supported MFI zeolite membranes was studied by comparing the phase structure of the zeolite films after heat-treatment at different temperatures. The zeolite membrane on the YZ support remained in the MFI structure up to 1000°C. The zeolite membrane on the α- Al2O3 support transformed completely to a quartz phase after heat-treatment at 950°C. Zirconia supported MFI type zeolite membrane is more hydrophobic, thermally stable and fouling resistant than the alumina supported one.

Original languageEnglish (US)
Pages (from-to)650-654
Number of pages5
JournalGao Xiao Hua Xue Gong Cheng Xue Bao/Journal of Chemical Engineering of Chinese Universities
Volume16
Issue number6
StatePublished - Dec 1 2002
Externally publishedYes

Keywords

  • Gas separation
  • MFI type zeolite
  • Membrane
  • Pervaporation
  • Substrate
  • Thermal stability

ASJC Scopus subject areas

  • Chemical Engineering(all)

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