Estudio de catalizadores de platino soportados sobre alfa-alumina modificada por circonia

FRANCISCO POMPEO; NORA NICHIO; OSMAR FERRETTI

Merida, Yucatan, Mexico

Simposio; XIX Simposio Iberoamericano de Catalisis; 2004

They were studied Pt catalysts supported on á-Al2O3 and á-Al2O3-ZrO2 in the synthesis gas obtention reactions (Partial Oxidation, Dry Reforming and Mixed Reforming). Pt/á-Al2O3- ZrO2 catalyst showed a very good performance in relation to the activity and selectivity, slightly higher than for Pt/á-Al2O3 catalyst, indicating that the mechanism for syngas formation is the same for both catalytic systems. Concerning to the deactivation, the modification of the á−Al2O3 support with ZrO2, leads to a higher stability, due to the inhibition of the carbon formation during the reaction. These results suggest that ZrO2 promotes the gasification of adsorbed intermediates which are precursors of carbon deposits.