Abstract
The reforming of methane with carbon dioxide has been investigated at 773 K on Rh/Al 2O 3 promoted with TiO 2 and V 2O 5. In addition, the dissociation of carbon dioxide and methane has also been examined. TPR and XPS results revealed that during the pre-treatment of the catalysts not only Rh reduced but also TiO 2 slightly and V 2O 5 significantly to V 4+ below 600 K. The dissociation of carbon dioxide occurred most easily on vanadia promoted catalyst. Vanadia and titania promoted Rh/Al 2O 3 was found to be more active in the CO 2 + CH 4 reaction than the Rh/Al 2O 3. The increase of the conversion observed on V 2O 5 and TiO 2 promoted Rh/Al 2O 3 catalysts could be attributed to the oxygen vacancies which formed on the additives during the pretreatment and the reaction.
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