Kinetics of the catalytic air oxidation of o-xylene over a commercial V 2O 5-TiO 2 catalyst

Abstract

The gas-phase oxidation of o-xylene over a commercial V 2O 5-TiO 2 catalyst was studied in fixed bed non-isothermal reactor. The experiments were carried out at initial o-xylene concentrations which differed greatly from each other. The following reaction network was suggested. ▪ It is suggested to use the Langmuir-Hinshelwood kinetic model in which a surface reaction between o-xylene and oxygen, chemisorbed on separate active centres, is the limiting step. It seems that the redox model is not adequate for the kinetic description of o-xylene oxidation.