Methods of activating catalysts for hydrodesulfurization of light gs oil(part 1 ) catalytic activity of CoMo/Al_2O_3 catalyst peresulfided with polusulfides for hydrodesulfurization of dibenzothiophene

摘要

The organci sulfur compound bis-(1,1,3,3-tetramethylbutyl)-polysulfide was investigated as a novel sulfiding agent for hydrodesulfurizatioion(HDS) catalyst by evaluating the conversion of dibenzothiophene (DBT) on a commercial Co-Mo/Al_2O_3 catalyst.The catalyst presulfided using the polysulfide in situ showed the same or higher activity for HDS and hydrogenation dpended remarkably on the presulfiding procedure such as type of sulfiding agent,temperature program in the presulfiding procedure,and insitu or ex situ method.The ~(35) S radioisotope tracer method was used toelucidate the effect of various sulfiding operation parameters on sulfur behavior on the sulfided catalyst in teh HDS reactoin of DBT.The effects of sulfiding agent and temperature programon the catalytic activity mainly originate from differences in the amount of labile sulfur formed in the different sulfiding processes.