Surface and catalytic properties of chromia-alumina catalysts 1- Catalytic dehydrogenation of cyclohexane and methylcyclohexane

Chromia-alumina catalysts of different composition and calcination temperatures were prepared by different methods. The surface areas of the catalysts were calculated and the dehydrogenation activities towards cyclohexane and methylcyclohexane were measured. The kinetics of the dehydrogenation reactions were determined. The activity depends on the calcination temperature, method of preparation and chromia content. Cr3+ is considered as an active phase in the dehydrogenation reactions