Oxidative Dehydrogenation of Propane on Supported Mlybdena Catalysts: Effect of the Support Nature and Additives

Oxidative dehydrogenation of propane has been studied on molybdena deposited on SiO2, Al2O3, TiO2, and MgO. The catalytic performance depended on the support nature, the selectivity to propene at iso-conversion decreasing in the sequence: MoOx/SiO2 >MoOx/Al2O3 ~ MoOx/TiO2 > MoOx/MgO. Introduction of the K, Cr , Ni and V additives to MoOx/SiO2 and Cr to MoOx/MgO catalysts led to the increase of the total activity. The increase of the selectivity to propene was observed for the Cr and Ni additives, whereas the K and V in the MoOx/SiO2 catalysts decreased the selectivity (K and higher amounts of V), or did not affect it (lower amounts of vanadium).