Dehydrogenation of cyclohexane was performed by using palladium-impregnated alumina membrane reactors packed with 0.5 wt% Pt/$Al_2O_3$ catalyst. The membranes were prepared by sol-gel method and electroless plating method. When the reactor has parabolic temperature distribution, as expected for flat temperature distribution, the conversions of cyclohexane in both membranes were increased with sweep gas flow rate and decreased with increasing carrier gas flow rate at fixed feed concentration. But, increasing catalyst loading made the conversion decreased. And the conversion from the membrane prepared by electroless plating method was higher than that from sol-gel method. These results and model study suggest that reverse reaction is significant depending on the catalyst loading and permeability.