Kinetics of Methylcyclohexane Cracking over Silica-Alumina Catalyst

Abstract

Summary:For the catalytic cracking of methylcyclohexane in a fixed bed, the product distriperature and one atmosphere pressure over a F. C. C. catalyst consisting of 25.33 weight per cent of alumina. It was observed that the catalyst activity declined as the reaction proceeds. The authors proposed a kinetic model that included cracking, hydrogenation and coke formation steps in the reaction process, and the rate constants were determined by simulation approach utilizing this kinetic model. The rate constants were rearranged in terms of coke content by introducing an activity factor which accounts for catalyst fouling. The calculated values of both the product distribution and the coke content in a fixed bed agreed fairly well with the observed values.