Abstract
An investigation of bulk (α-WC, α -W2C) and supported tungsten carbide was carried out using the formation of alcohols in Fischer-Tropsch synthesis as a chemical probe. The active phases were characterized by X-ray photoelectron spectroscopy.
It was found that W2C gave only linear alkanes while WC produced 18% alcohols together with hydrocarbons. The formation of alcohols was related to the surface stoichiometry of tungsten carbide, i.e. to the presence of carbon vacancies and to the extent of carburization. Whenever the level of carburization was too high, only hydrocarbons were formed, as on SiO2, CeO2 and ZrO2 supported samples. The formation of alcohols was linked to an interaction between a carbide and an oxide phase on Al2O3 and TiO2 supported samples.
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Leclercq, L., Almazouari, A., Dufour, M., Leclercq, G. (1996). Carbide-oxide interactions in bulk and supported tungsten carbide catalysts for alcohol synthesis. In: Oyama, S.T. (eds) The Chemistry of Transition Metal Carbides and Nitrides. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-1565-7_18
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DOI: https://doi.org/10.1007/978-94-009-1565-7_18
Publisher Name: Springer, Dordrecht
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