Oxidative Dehydrogenation of Alkanes Over Alkali and Alkaline Earth Orthovanadates

摘要: The orthovanadates of the alkaline and earth metals un-modified oxides have been compared with vanadium pentoxide as catalysts for oxidative dehydrogenation ethane propane. do not contain V=O species known to cause deeper oxidation; presence also reduces acidity component. It was found that pure gave substantial combustion. an increase in selectivity towards olefin production order Ba≤Sr≤Ca≤Mg this coupled activity same order. unmodified exhibited some selectivity, increasing order; however, increased from BaO MgO. For orthovanadate series, there a shift V-O infra-red absorption band higher frequencies. Selective oxidation over thus seems depend mainly on strength bond.