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Garcia, V., Caldes, M. T., Joubert, O., Gallego, G. S., Batiot-Dupeyrat, C., Piffard, Y. & Moreno, J. A. (2008) Dry reforming of methane over nickel catalysts supported on the cuspidine-like phase Nd4Ga2O9. Catal. Today, 133 231–238.
Added by: Laurent Cournède (2016-03-10 21:58:42) |
| Type de référence: Article DOI: 10.1016/j.cattod.2007.12.061 Numéro d'identification (ISBN etc.): 0920-5861 Clé BibTeX: Garcia2008 Voir tous les détails bibliographiques  |
Catégories: ST2E Mots-clés: combustion, cuspidine-type phases, dry reforming, Ni catalysts, syngas Créateurs: Batiot-Dupeyrat, Caldes, Gallego, Garcia, Joubert, Moreno, Piffard Collection: Catal. Today |
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Carbon dioxide reforming of methane was studied over Ni catalysts supported on the cuspidine-like phase Nd4Ga2O9. Attempts to prepare two types of materials were undertaken by combustion synthesis: Nd(4)Ga(2(1-x))Ni(2x)O(9-x\_)compounds and Ni/Nd4Ga2O9 samples containing 5, 10 and 15 wt\% of Ni. The Ni-substituted Nd4Ga2O9 phases could not be obtained, whereas the Ni/Nd4Ga2O9 catalysts were prepared successfully. All catalysts exhibit activity towards dry reforming of methane. The best catalytic activity was observed at 800 degrees C for the catalyst with a Ni content of 10\% reduced at 700 degrees C. After 12 h on steam, Ni particles were 10-20 nm in size, and no carbonaceous deposits were observed. A strong and complex interaction between nickel and the cuspidine Nd4Ga2O9 support exists. This feature coupled with the moderate basicity of the cuspidine-type support could explain the weak Ni coarsening observed under reaction conditions and the good resistance to coking of the catalysts. (C) 2007 Elsevier B.V. All rights reserved.
Added by: Laurent Cournède |