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Catalytic Combustion of Methane on Fe-TiO2 Catalysts Prepared by Sol-Gel Method

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Abstract

Two different series of titania-supported iron catalysts prepared by the sol-gel method have been characterised and tested in the combustion of methane at atmospheric pressure. In each series, the effect of metal loading (1, 5 and 10 wt%) and gelation pH (3 and 9) were studied. Characterisation data of calcined catalysts, carried out by specific area measurement, TPR, X-ray diffraction, XPS and EPR revealed no significant changes in metal dispersion. The catalytic activity of the solids were evaluated in the combustion of methane under stoichiometric mixture of CH4/O2 from 473 K up to the temperature required for total combustion. The best performance was shown by catalysts having 5 wt.%, which is ascribed to a balance of factors like the presence of a sufficient concentration of iron at the surface, achievement of relatively high dispersion state for iron and the presence of Fe+3 ions incorporated to the lattice of titania.

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Authors and Affiliations

  1. Fac. Ciencias Químicas, U. Concepción, Casilla 160, Concepción, Chile

    G. Pecchi & P. Reyes

  2. U. Autónoma Metropolitana-Iztapalapa, 09340, México, D.F, A.P. 55-534

    T. López, R. Gómez & A. Moreno

  3. I. Catálisis y Petroleoquímica, CSIC, Cantoblanco, 28049, Madrid, Spain

    J.L.G. Fierro & A. Martínez-Arias

Authors
  1. G. Pecchi
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  2. P. Reyes
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  4. R. Gómez
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  6. J.L.G. Fierro
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  7. A. Martínez-Arias
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Pecchi, G., Reyes, P., López, T. et al. Catalytic Combustion of Methane on Fe-TiO2 Catalysts Prepared by Sol-Gel Method. Journal of Sol-Gel Science and Technology 27, 205–214 (2003). https://doi.org/10.1023/A:1023758819596

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