Oxidative Dehydrogenation Of Propane Over Supported-Vanadium Oxide Catalysts

Vanadium supported on SiO2, AI2O3, TiO2, MgO, La2O3, Sm2O3 and Bi2O3 as well as La, Sm and Bi orthovanadates have been studied for the oxidative dehydrogenation of propane. It has been found that V-O species in which the V is in octahedral and tetrahedral positions are active, the tetrahedral being less active and more selective. The higher the concentration of species VO2+, and species V2O5 the lower is the selectivity to propene. The acid-base/redox properties of the support and the metal, in the vanadates, controls the proportion of the different vanadium species formed.