The reaction behavior of meta-xylene ammoxidation on a commercial V−Cr mixed oxide catalyst (NC-IV) were studied in a fixed bed reactor, by kinetic modeling of experimental data of designed conditions. Specially, the oxidation of NH 3 to N 2 was also involved in the kinetic model, which is vital in the ammoxidation reaction. The catalyst showed monoclinic CrVO 4 phase and spherical morphology with an average particle diameter of 45 μm. Nonlinear regression analysis of the evaluation data has been employed to determine the rate constant and the order of reaction. The results indicated that m-xylene, oxygen, and ammonia share similar kinetic reaction orders for the production of isophthalonitrile (IPN) and m-tolunitrile (MTN), while the NH 3 oxidation reaction shows the highest reaction order, indicating that the partial pressure of ammonia and O 2 requires a precise control. The calculation of activation energies implies that selective ammoxidation to IPN has the highest activation energy (170.6 kJ mol −1 ), which is higher than MTN formation (117.5 kJ mol −1 ). The oxidation of m-xylene to CO 2 has slightly higher activation energy (122.9 kJ mol −1 ) than MTN production, implying the production of mtolunitrile is the dominant reaction under high reaction WHSV. The NH 3 oxidation shows the lowest activation energy (58.2 kJ mol −1 ) than the m-xylene participated reactions demonstrating a relatively easy NH 3 oxidation. These kinetic analyses are useful for a better understanding of the catalytic ammoxidation reaction of alkyl substituted aromatics over V−Cr mixed oxide catalysts.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.