| A high-pressure reactor system for studying catalytic hydroprocessing reactions was constructed and tested. The autoclave was used as a liquid-phase batch slurry reactor for investigating the individual and simultaneous effects of hydrogen sulfide, ammonia and water on the kinetics of catalytic hydrogenation of propylbenzene. Experiments were carried out at 330, 350, and 375;Propylcyclohexane was the only product of propylbenzene hydrogenation. The hydrogenation of propylbenzene over both oxide and sulfided catalysts was observed to follow pseudo-first order kinetics in propylbenzene under all conditions studied. Results showed that due to the presence of hydrogen sulfide, the hydrogenation rate was reduced by 10-15%. Filling of sulfur-anion vacancies is postulated as the cause for this effect. In the presence of hydrogen sulfide and ammonia, the rate was inhibited by 44.7% at 330... |
