Propane underwent dehydrogenation and cracking on alumina-supported Pt metals at 823-923 K. Propylene formed with highest selectivity (50-80%) on Pt/Al2O3. The deposition of carbonaceous species was observed on every sample, the hydrogenation of which occurred only above 700-750 K with a peak temperature of 900-950 K. The presence of CO2 basically altered the reaction pathway of propane, and the formation of CO and H-2 came into prominence. the highest specific rates for the production of H-2 and CO were measured for the Ru and Rh catalysts.