硫化型NiMo加氢催化剂制备与表征

以四硫代钼酸铵溶液和硝酸镍溶液为浸渍液，根据活性组分Ni和Mo浸渍顺序的不同，采用真空饱和浸渍法制备了MN系列和NM系列 NiMoS/γ-Al₂O₃催化剂。在固定床加氢中试反应装置上研究了NiMoS/γ-Al₂O₃催化剂对二苯并噻吩加氢反应的催化性能，结果表明，NiMoS/γ-Al₂O₃催化剂对二苯并噻吩加氢反应具有良好的活性和选择性。Ni助剂的加入，有利于二苯并噻吩加氢反应的活性和选择性。MN-0.3为最优NiMoS/γ-Al₂O₃催化剂。在空速10 h^-1、反应压力2.0 MPa、氢油体积比300∶1、氢气预处理温度320 ℃和反应温度300 ℃条件下，催化剂对二苯并噻吩加氢反应转化率达83.9%，加氢反应活性较高。

Preparation and characterization of sulfided NiMo catalysts for diesel hydrotreating

Using the solutions of （NH4）2MoS4 and Ni （NO3）2 as the impregnation solution,and according to the impregnation sequence of active components Ni and Mo,NiMoS/γ-Al2O3 catalysts were prepared by vacuum saturated impregnation method.The catalytic performance of NiMoS/γ-Al2O3 catalysts for dibenzothiophene hydrogenation was investigated in a fixed-bed-pilot-reactor.The results showed that NiMoS/γ-Al2O3 catalyst possessed good activity and selectivity for dibenzothiophene hydrogenation.The addition of Ni additive was beneficial to enhancement of activity and selectivity for dibenzothiophene hydrogenation.MN-0.3 catalyst exhibited the best hydrogenation activity among NiMoS/γ-Al2O3 catalysts.The conversion of dibenzothiophene over MN-0.3 catalyst reached 83.9％ under the optimum condition as follows：space velocity 10 h-1,system pressure 2.0 MPa,volume ratio of hydrogen to oil 300∶ 1,hydrogen pretreatment temperature 320 ℃,and reaction temperature 300 ℃.