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Abstract

Monometallic catalysts of Pd supported on gamma-Al2O3 were prepared using wet impregnation, pretreated under oxidative conditions and tested for catalytic activity for the reaction of oxidative dehydrogenation of propane (ODHP). Propane conversion and selectivity to propylene on Pd supported catalyst was evaluated as function of feed ratio (W/Feed C3H8), ratio of oxygen/propane (U) and temperature, showed a strong effect of the oxygen/propane ratio both on conversion and selectivity. Higher concentration of oxygen in the reactor feed increases propane conversion, but reduces propylene selectivity; the best performance of selectivity as a function of the ratio of oxygen/propane (U) was at the stoichiometric condition (U=1). Propane conversion increases as the feed ratio (W/Feed C3H8) increases, on the contrary propylene selectivity decreases as the feed ratio (W/Feed C3H8) increases; both behaviors are properly adjusted by a Simplified Eley-Rideal (SEM) mechanism.