Oxidation property of the V-Mg-O/TiO2 catalyst

Abstract

The oxidatition property of a series of V-Mg-O/TiO2 catalt in the oxidation reaction of propane, propene, 1-propanol and carbon monoxide is investigated. It has been found that the catalytic behavior of the catalyst depends on the reactants. Propene and CO2 are the major products in the propane oxidation reaction. The vanadium and magnesium contents affect the catalytic property of the V-Mg-O/TiO2 catalyst in this reaction. The sequence of magnesium loading also affects the structure and catalytic performance of this catalyst. In addition, this catalyst is inactive for propene oxidation, from which it can be indicated that propene formed in propane oxidation reaction is not further oxidized to CO2. According to 1-propanol oxidation, propanal is the main observable product at low reaction temperatures, and it is oxidized rapidly to CO2 when the reaction temperature is increased. Moreover, the dehydration of 1-propanol becomes significant at high temperatures. It is found that the sequence of magnesium loading and magnesium content have no effect on the catalytic performance of the catalyst. On the other hand, increasing vanadium content improves the propene selectivity and decreases the CO2 selectivity. Finally, in CO oxidation, this catalyst is rather inactive. Since CO is an unobservable product in propane, propene and 1-propanol reactions, on the V-Mg-O/TiO2 catalysts, CO is not produced in these three reactions.