Improvement of hydrogen-separating performance by on-stream catalytic cracking of silane over hollow fiber MFI zeolite membrane

Zhou Hong, Feng Sun, Dongdong Chen, Chun Zhang, Xuehong Gu, Nanping Xu

Research output: Contribution to journalArticlepeer-review

39 Scopus citations

Abstract

MFI zeolite membranes were synthesized on porous α-alumina hollow fibers by in-situ hydrothermal synthesis. The membranes were further modified for H2 separation by on-stream catalytic cracking deposition of methyldiethoxysilane (MDES) in the zeolitic pores. The separation performance of the modified membranes was characterized by separation of H2/CO 2 gas mixture at 500 C. Activation of MFI zeolite membranes by air at 500 C was found to promote catalytic cracking deposition of silane in the zeolitic pores effectively, which resulted in significant improvement of H 2-separating performance. The H2/CO2 separation factor of 45.6 with H2 permeance of 1.0 × 10-8 mol m-2 s-1 Pa-1 was obtained at 500 C for a modified hollow fiber MFI zeolite membrane. The as-made membranes showed good thermochemical stability for the separation of H2/CO2 gas mixture containing H2O and H2S, respectively. ©

Original languageEnglish
Pages (from-to)8409-8414
Number of pages6
JournalInternational Journal of Hydrogen Energy
Volume38
Issue number20
DOIs
StatePublished - 9 Jul 2013

Keywords

  • Hollow fiber
  • Hydrogen separation
  • MFI zeolite membrane
  • Modification
  • Stability

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