镍钴助催化剂对环烷酸钼催化煤沥青悬浮床加氢反应活性的影响

Effect of nickel cobalt co-catalyst on catalytic activity of molybdenum naphthenate for the hydroprocessing of coal tar pitch in suspension bed

合成了钼、镍、钴的五种分散型油溶性均相催化剂,选用高压釜反应器进行悬浮床加氢催化反应,控制反应条件在370℃、10 MPa氢压,反应时间4 h,考察环烷酸钼加入量、钼-镍、钼-钴双金属等比例对加氢反应的影响。通过反应结果的液体收率来衡量催化体系的煤沥青加氢催化效果。综合运用了元素分析、ICP-MS、透射电镜、X射线光电子能级、四组分分析等多种分析方法,探索煤沥青悬浮床加氢反应的最优催化体系。得出最优催化体系为:2.0×10^−3下,环烷酸钼&环烷酸镍(1∶1)。此体系下,液体收率达85.3%,残渣量10.6%,气体4.1%。

Five dispersed molybdenum,nickel and cobalt oil soluble homogeneous catalysts were synthesized.The hydrogenation of coal tar pitch was under the conditions of 370°C,10 MPa hydrogen pressure,and 4 h reaction time in an autoclave reactor.The effects of molybdenum naphthenate addition,molybdenum nickel and molybdenum cobalt bimetallic ratios on hydrogenation were investigated.The catalytic hydrogenation effect was evaluated by the liquid yield.A variety of analytical methods,such as elemental analysis,ICP-MS,TEM,XPS,and four component separation,were used to explore the optimal catalytic system for the slurry bed hydrogenation of coal tar pitch.The results show that the optimal catalytic system is molybdenum naphthenate and nickel naphthenate ratio of 1∶1 at catalyst amount of 2×10^3.Under optimal conditions,the liquid yield is 85.3%,the residue yield is 10.6%,and the gas yield is 4.1%.