An application of V-Mg-O/TiO2 catalyst on the combustion of anhydrides

Abstract

The oxidation property of the V-Mg-O/TiO2 catalysts on the combustion of phthalic anhydride and maleic anhydride is investigated. From the results, the MgO modified V2O5/TiO2 catalysts can better oxidize the anhydride ring than the unmodified one. Using benzene, toluene, ethylbenzene and acetic acid as reactant, it is found that only carboxyl group can be reacted with the V-Mg-O/TiO2 catalysts, the V-Mg-O/TiO2 catalysts favor to react with anhydride ring. Additionally, the catalysts can react with the C=C bond of maleic anhydride. The appropriate ratio of vanadium per magnesium lead to a balance between the adsorption of the anhydrides and the catalytic activity of vanadium and titania support.