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Garcia, V., Caldes, M. T., Joubert, O., Gautron, E., Mondragon, F. & Moreno, A. (2010) Methane oxidation by lattice oxygen of Ni/BaTi1xInxO3d catalysts. Catalysis Today, 157 177–182.
Added by: Richard Baschera (2016-09-02 14:13:53) Last edited by: Richard Baschera (2016-09-02 14:16:50) |
| Type de référence: Article DOI: http://dx.doi.org/10.1016/j.cattod.2010.01.021 Numéro d'identification (ISBN etc.): 0920-5861 Clé BibTeX: Garcia2010a Voir tous les détails bibliographiques  |
Catégories: INTERNATIONAL, ST2E Mots-clés: Perovskite SOFC Methane Partial oxidation Pulses Créateurs: Caldes, Garcia, Gautron, Joubert, Mondragon, Moreno Collection: Catalysis Today |
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| Liens URLs http://www.science ... /S092058611000026X |
| Résumé |
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BaTi1-xInxO3-d perovskites (called BITx) were evaluated as supports of nickel catalysts for methane oxidation in the absence of gas-phase oxygen. Ni/BaTi1-xInxO3-d (x = 0 and 0.3) catalysts were studied, by temperature programmed surface reaction of methane (TPSR-CH4) and pulses at 850 °C. In these conditions, the only oxygen source is the oxide bulk support. TPSR-CH4 results suggest that the support is able to oxidize the methane producing H2 and CO at temperatures above 750 °C. Ni/BT and Ni/BIT0.7 catalysts, showed a high selectivity towards partial oxidation products. Ni/BIT0.7 catalyst was more stable than Ni/BT due to the existence of Ni–In alloys which catalyze less the cracking reaction. Moreover, the higher ionic conductivity of BIT0.7 facilitates the O2- ions diffusion to the surface and promotes the oxidation of carbonaceous deposits formed on the metal–support interface preventing thus catalyst deactivation.
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