Abstract
The hydrogenolysis reaction of dibenzothiophene over molybdenum sulfide, tungsten sulfide, cobalt sulfide, and nickel sulfide catalysts were studied by means of a batch method.
From the experimental results, the following conclusions were obtained.
1) The hydrogenolysis activity was in the following order:
Molybdenum sulfide>Tungsten sulfide>Cobalt sulfide>Nickel sulfide
2) The formation reaction of biphenyl and the consecutive reaction in which hydrogenation and cracking proceed competitively occur simultaneously.
3) The hydrogenolysis activity of dibenzothiophene is varied by the amount of hydrogen sulfide which is related to the equilibrium of molybdenum disulfide and molybdenum trisulfide.
4) The active sites for the hydrogenation of the aromatic nucleus are different from the sites for the cleavage of c-s bond.
