Oxidative dehydrogenation of propane on rare earth vanadates influence of the presence of CO2 in the feed

The oxidative dehydrogenation of propane on rare earth vanadates is always in competition with the total oxidation of the alkane which leads to the formation of CO2 and CO. Addition of CO2 intothe feed results in an increased C3H6 selectivity together with a decreased CO formation through the total oxidation of the alkane or the formed alkene. For the tested rare earth vanadates as well as for the niobium promoted catalysts an enhancement of the C3H6 selectivity at isoconversion and thus of the C3H6 yields is observed upon CO2 addition into the feed.