Reaction kinetics of propane dehydrogenation over partially reduced zinc oxide supported on silicalite

Abstract

The kinetics of propane dehydrogenation to produce propene over partially reduced zinc oxide supported on silicalite have been investigated over the temperature range 753–823 K at atmospheric pressure. It was found that hydrogen concentration had no influence on the dehydrogenation rate, while the presence of propene inhibited the reaction. A mechanism involving hydrogen-atom dissociation from propane is proposed for the propane dehydrogenation kinetics. Based on the kinetic analysis, it is suggested that propane adsorption is the rate-determining step in the overall reaction mechanism. The activation energy for the reaction was 29 kcal mol^–1.