Two kinds of oil-soluble sulfur-containing and sulfur-free catalysts are pre-sulfurized at different sulfurization temperatures.The treated catalysts were characterized by elemental analysis,XRD,HRTEM and XPS.Additionally,the effect of catalysts under different sulfurization temperature on the desulfurization activity and hydrodesulfurization(HDS)reaction path of dibenzothiophene were investigated using dibenzothiophene as the model compound.The results show that with the increase of sulfidation temperature,the Mo4+content and the degree of sulfidation for the two oil-soluble catalysts are increased,a gradual sharp and obvious trend in XRD characteristic peaks of MoS2 active phase are observed.Moreover,the length of MoS2 stripes and the number of stacked layers are gradually increased.In the evaluation of HDS reaction performance,the desulfurization performance of the two oil-soluble catalysts for dibenzothiophene is dominated by the direct desulfurization(DDS)pathway,and the HDS path selectivity shows a decreasing trend with the increase of sulfurization temperature.The activity of oil-soluble catalyst containing sulfur shows a decreasing trend with the increase of sulfurization temperature,while the oil-soluble sulfur-free catalyst exhibits the highest catalytic activity at the sulfurization temperature of 320 ℃.
万方数据
维普
