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Investigation of the Stability of CeO2, V2O5 and CeV Mixed Oxide on the Partial Oxidation of Propane

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Abstract

The cerium–vanadium mixed oxide was synthesized by complexation method. XRD patterns of the (CeV) mixed oxide showed the formation of CeVO4 phase and segregated CeO2. Incorporation of vanadium into the ceria structure improved the redox ability of ceria. The results showed that the activity of the (CeV) mixed oxide was higher than of the vanadium oxide (V2O5) for the partial oxidation of propane. Both catalysts showed similar hydrogen selectivity but significant deactivation with time on stream. Investigation by XRD diffractograms of V2O5 after reaction showed sintering of V2O5 and different oxidation states after reaction, while the crystallites and the structure of the mixed oxide CeVO4 remained unchanged. The deactivation of the mixed oxide (CeV) with time on stream can be explained by insufficient oxygen supply to restore the CeO2 species at the surface.

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Acknowledgments

The authors thank Marta Cristina Amorim and Carlos André Perez for the discussions on FEG and XRD analyses; CNPq (Conselho Nacional de Desenvolvimento Científico) and FAPERJ (Fundação de Amparo à Pesquisa do Estado do Rio de Janeiro) for the scholarship (C.A.C) and Research Funding’s.

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Authors and Affiliations

  1. Programa de Engenharia Química-COPPE/NUCAT, Centro de Tecnologia, Federal University of Rio de Janeiro, Bl. G 128, P.O. Box 68502, Rio de Janeiro, RJ, 21941-972, Brazil

    Carlos Alberto Chagas, Lidia Chaloub Dieguez & Martin Schmal

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  1. Carlos Alberto Chagas
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  2. Lidia Chaloub Dieguez
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  3. Martin Schmal
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Correspondence to Martin Schmal.

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Chagas, C.A., Dieguez, L.C. & Schmal, M. Investigation of the Stability of CeO2, V2O5 and CeV Mixed Oxide on the Partial Oxidation of Propane. Catal Lett 142, 753–762 (2012). https://doi.org/10.1007/s10562-012-0800-x

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  • DOI: https://doi.org/10.1007/s10562-012-0800-x

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