Propane dehydrogenation has been simulated for a composite membrane reactor and a microporous membrane reactor using plug-flow reactor models, in which both were packed with Pt/Al2O3 catalyst in the tube-side. The reaction kinetics employed in the analysis were obtained from experimental data produced in an integral fixed bed reactor with the same catalyst. Comparative studies were carried out to analyse the performances of reactors containing the different membranes in terms of contact time, flow pattern and flow rate of sweep gas, and pressure. In general, the composite membrane reactors gave the better performance for all cases investigated.