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

研究成果: Article査読

54 被引用数 (Scopus)

抄録

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.

本文言語English
ページ(範囲)3950-3954
ページ数5
ジャーナルIndustrial and Engineering Chemistry Research
45
11
DOI
出版ステータスPublished - 2006 5月 24
外部発表はい

ASJC Scopus subject areas

  • 化学 (全般)
  • 化学工学(全般)
  • 産業および生産工学

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