The Effect of Sn on the Reactions of n-Hexane and Cyclohexane over Polycrystalline Pt Foils

摘要: The modification of the catalytic properties a polycrystalline platinum foil by addition tin was studied reactions n-hexane and cyclohexane in excess H{sub 2}. were at 13.3 kPa n-hexane, 450 2} 740 K, 6.7 cyclohexane, 573 K. Pt-Sn catalyst characterized Auger electron spectroscopy temperature-programmed desorption CO before after reactions. sites that bind most strongly on Pt also have highest initial turnover rate are first ones to be poisoned carbon deposits from hydrocarbon or sulfur when sulfur-containing compound (thiophene) is present feed. can block these preferentially, thus decreasing undesirable high hydrogenolysis catalysts reforming eliminating need for presulfiding catalyst. Also, suppressed reaction preferentially isomerization cyclization increasing selectivities cyclization. amount deposited smaller containing during dehydrogenation n-hexane.