Effect of Carburization Conditions on the Activity of Molybdenum Carbide-Supported Catalysts Promoted by Nickel for the Dry Reforming of Methane
Camila G. Silva, Fábio B. Passos, Victor Teixeira da Silva
Abstract
The effect of the carburization temperature on the performance of nickel-promoted molybdenum carbides supported on γ-alumina and silicon carbide as catalysts in dry methane reforming at 800 °C was evaluated. The precursor oxides were synthesized via incipient wetness impregnation and carburized at 700, 750, and 800 °C employing temperature-programmed carburization. The effect of the carburization temperature was more evident for alumina-supported catalysts as a certain excess of carbon on the surface was needed as a shield against oxidation. In the case of silicon carbide-supported catalysts, the carburization temperature did not affect the activity, showing the superiority of this support for different dry reforming operational conditions.