Catalysis Letters, Vol.147, No.3, 663-673, 2017
Dehydrogenation of Cyclohexane on Pt(111) in a Bulb Reactor
The dehydrogenation of cyclohexane on Pt (111) single crystal was investigated in a bulb reactor. The volume expansion associated with the dehydrogenation of cyclohexane into benzene causes a total pressure change which was used as an index of the extent of the reaction. The validity of this reactor for kinetic studies was tested by means of CO oxidation. The dehydrogenation of cyclohexane is a reversible reaction. High temperature is favorable for dehydrogenation. By switching the temperature, the cycles of cyclohexane dehydrogenation and benzene hydrogenation were observed in this bulb reactor. The formation of carbonaceous deposits on Pt(111) surface caused a progressive loss of total pressure during the reaction cycle. A Hougen-Watson model was used to model the dehydrogenation of cylohexane on Pt(111) single crystal in the absence of deactivation. The model parameters were statistically significant and satisfied the physicochemical criteria.