Preparation of a catalyst composite silica membrane reactor for steam reforming reaction by using a counterdiffusion CVD method

Mikihiro Nomura, Masahiro Seshimo, Hitoshi Aida, Katsuya Nakatani, Suraj Gopalakrishnan, Takashi Sugawara, Tom Ishikawa, Mitsutaka Kawamura, Shin Ichi Nakao

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49 Citations (Scopus)

Abstract

A silica membrane prepared by a counterdiffusion CVD method using tetramethyl orthosilicate and O2 was applied to a steam reforming reaction of methane. This silica membrane showed hydrothermal stability for more than 80 h at 773 K under H2O/N2 = 3. The H 2/H2O permeance ratio was about 290 after the hydrothermal stability test. Rh or Ni catalyst was dipped on a porous alumina substrate before chemical vapor deposition (CVD). As a result, a composite catalytic membrane of a hydrogen permselective silica layer and a catalyst layer was obtained. This catalyst composite membrane reactor was applied to steam reforming reaction to extract hydrogen. Rh catalyst showed better stability than that for Ni catalyst. Methane conversion was increased to 64.5% from the equilibrium value (31.4%) at 773 K under S/C = 2 by the Rh-dipped membrane reactor. High conversion of methane was due to high selectivity of H 2/H2O that was confirmed by the simulation evaluation.

Original languageEnglish
Pages (from-to)3950-3954
Number of pages5
JournalIndustrial and Engineering Chemistry Research
Volume45
Issue number11
DOIs
Publication statusPublished - 2006 May 24
Externally publishedYes

ASJC Scopus subject areas

  • Polymers and Plastics
  • Environmental Science(all)
  • Chemical Engineering (miscellaneous)

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    Nomura, M., Seshimo, M., Aida, H., Nakatani, K., Gopalakrishnan, S., Sugawara, T., Ishikawa, T., Kawamura, M., & Nakao, S. I. (2006). Preparation of a catalyst composite silica membrane reactor for steam reforming reaction by using a counterdiffusion CVD method. Industrial and Engineering Chemistry Research, 45(11), 3950-3954. https://doi.org/10.1021/ie051345z