FTIR study of CO/H{sub 2} reactions over Ru/TiO{sub 2} and Ru-Rh/TiO{sub 2} catalysts at high temperature and pressure
- The University, Dundee (United Kingdom)
Infrared spectra are reported of Ru/TiO{sub 2} and Ru-Rh/TiO{sub 2} exposed to CO + H{sub 2} at 553 K and 1.5 MN m{sup -2} (15 atm). The Ru-Rh catalyst contained both exposed Ru and Rh atoms, which during reaction favoured adsorbed linear CO on Ru and bridged CO on Rh. Formation of an inactive long-chain hydrocarbon was accompanied by the appearance of a short-chain hydrocarbon which could be subsequently converted to methane. Ethoxide and ethanoate ions resulted from catalysis involving Rh. The results contrast with previous data for Ru-Rh/TiO{sub 2}. A 14:1 ratio of CO:H{sub 2} over Ru-Rh/TiO{sub 2} predominantly gave methane and an adsorbed CH{sub 2}-containing hydrocarbon. The mixed metal catalyst generated more methane but less surface hydrocarbon than either Ru/TiO{sub 2} or Rh/TiO{sub 2} catalysts. 37 refs., 5 figs.
- OSTI ID:
- 224010
- Journal Information:
- Journal of Catalysis, Journal Name: Journal of Catalysis Journal Issue: 2 Vol. 157; ISSN 0021-9517; ISSN JCTLA5
- Country of Publication:
- United States
- Language:
- English
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