RS-1100柴油加氢脱硫催化剂的研制

THE DEVELOPMENT OF RS-1100 DIESEL HYDRODESULFURIZATION CATALYST

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。

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 cat- alyst 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 im- pregnation solution. The characterization of said impregnation solution by Raman spectroscopy and UV- Vis spectrophotometer showed that phosphorus-molybdenum heteropolyanions of [P2 MO5 O23]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 devel- oped. The pilot-plant test results show that the activity of RS-1100 catalyst is higher than that of com- mercial 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.