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Comparison of the group V and VI transition metal carbides for methane dry reforming and thermodynamic prediction of their relative stabilities

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Abstract

The group V and VI transition metal carbides have been prepared by CH4 TPR, and tested for the dry reforming of methane with carbon dioxide, at elevated pressure. Mo2C and WC were the most stable catalysts, while the group V metal carbides showed the stability order: vanadium \({\text{ >}}\) niobium \({\text{ >}}\) tantalum. Catalyst deactivation was due to carbide oxidation with CO2, while stability was associated with the reaction of metal oxide (from deactivation) with CH4, giving the metal carbide. Calculation of the Gibbs free energy for this reaction resulted in a predicted catalyst stability trend similar to that obtained experimentally.

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Authors and Affiliations

  1. The Catalysis Centre, Inorganic Chemistry Laboratory, University of Oxford, South Parks Road, Oxford, OX1 3QR, UK

    Attila J. Brungs, Andrew P.E. York & Malcolm L.H. Green

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  1. Attila J. Brungs
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  2. Andrew P.E. York
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  3. Malcolm L.H. Green
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Brungs, A.J., York, A.P. & Green, M.L. Comparison of the group V and VI transition metal carbides for methane dry reforming and thermodynamic prediction of their relative stabilities. Catalysis Letters 57, 65–69 (1999). https://doi.org/10.1023/A:1019062608228

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  • DOI: https://doi.org/10.1023/A:1019062608228

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