Promotion effects of vanadium, niobium, molybdenum, tungsten, and rhenium oxides on surface reactions in the CO hydrogenation over Ru/Al2O3 catalyst

Toshiaki Mori, Akira Miyamoto, Naoki Takahashi, Masato Fukagaya, Tadashi Hattori, Yuichi Murakami

Research output: Contribution to journalArticlepeer-review

70 Citations (Scopus)

Abstract

By use of the PSRA (pulse surface reaction rate analysis) apparatus equipped with an EDR (emissionless infrared diffuse reflectance spectrometer) and an FID (flame ionization detector), the promotion effects of oxides of V, Nb, Mo, W, and Re have been investigated for the surface hydrogenation reaction of CO over Ru/Al2O3 catalysts. These promoters markedly increase the rate constant for the dissociation of CO to form (CHx)ad (kCO), while decreasing the rate constant for the hydrogenation of (CHx)ad to CH4 (kCHx). In accordance with the observed change in rate constants, it was found that the surface concentration (CHx)ad species on the catalyst increased during the steady-state reaction, resulting in an increase in the yield of higher molecular weight hydrocarbons. The promotion mechanism leading to the dissociation of CO is discussed on the basis of the results obtained from PSRA.

Original languageEnglish
Pages (from-to)5197-5201
Number of pages5
JournalJournal of Physical Chemistry
Volume90
Issue number21
Publication statusPublished - 1986 Dec 1

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

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