RS-1100柴油加氢脱硫催化剂的研制

采用合适的拟薄水铝石制备氧化铝载体，并以浸渍法制备NiMo/Al2O3催化剂，找到催化剂中适宜的Ni/(Ni+Mo)原子比，在浸渍液中引入适量的助剂和有机络合剂可以提高NiMo/Al2O3催化剂的活性。采用拉曼光谱和紫外-可见光谱仪对浸渍液进行了表征，结果表明浸渍液中存在杂多酸阴离子P2Mo5O23]6-；络合剂与Ni离子也存在相互作用。通过制备条件优化，研制出高活性加氢脱硫催化剂RS-1100。中型装置评价结果表明，RS-1100催化剂的柴油超深度加氢脱硫活性比工业参比剂RS-1000更高，采用RS-1100催化剂在合适的加氢反应条件下可以生产满足欧Ⅴ排放标准的柴油。

THE DEVELOPMENT OF RS-1100 DIESEL HYDRODESULFURIZATION CATALYST

NiMo/Al2O3 catalyst was prepared by impregnation method using alumina support from appropriate pseudo-boehmite. The effect of Ni/(Ni+Mo) atomic ratio on the activity of NiMo/Al2O3 catalyst was investigated and optimized ratio was acquired. The activity of NiMo/Al2O3 catalyst could be further improved by adding optimum amount of phosphorus promoter and chelating agent into the impregnation solution. The characterization of said impregnation solution by Raman spectroscopy and UV-Vis spectrophotometer showed that phosphorus-molybdenum heteropolyanions of P2Mo5O23]6- existed in the solution, besides, some interactions between chelating agent and Ni2+ cations also happened. By optimizing preparation conditions, RS-1100 hydrodesulfurization catalyst with high activity was developed. The pilot-plant test results show that the activity of RS-1100 catalyst is higher than that of commercial RS-1000 catalyst at ultra-deep hydrodesulfurization stage, whereas, the bulk density of RS-1100 catalyst is lower. Diesel oil meeting European emission standard V can be produced by RS-1100 catalyst under suitable hydrogenation reaction conditions.