How oxide carriers affect the reactivity of V2O5 catalysts in the oxidative dehydrogenation of propane

The catalytic pattern of several oxide carriers (MgO, Al2O3, ZrO2, TiO2, Si O2, HY zeolite) and supported V2O5 (4.7-5.3 wt%) catalysts in the oxidative dehydrogenation of propane to propylene (PODH) has been comparatively inve stigated. The fundamental role of the oxide support on both reducibility an d reactivity of vanadia catalysts has been assessed. A direct relationship between the specific surface activity of oxide carriers and that of vanadia catalysts is discussed. The inverse relationship between the specific acti vity and the onset temperature of reduction marks the prevailing redox beha viour of V2O5 catalysts in the PODH reaction.