超细镍基催化剂下甲苯加氢性能的分析

摘要

Ultrafine nickel-based catalyst was prepared by sol-gel using tetraethoxy-silane（TEOS）, n-butyl phthalate acid,and nickel nitrate as raw materials,and the samples were characterized.The most appropriate process condition was determined for the ultrafine nickel-based hydrogenation catalysts toluene by changing the temperature,pressure,space velocity,hydrogen and other hydrocarbon process conditions.The results show that the maximum conversion of toluene hydrogenation rate of 100% when the temperature is between 160—170 ℃,pressure is between 0.6—0.8 MPa,airspeed is 4 h-1,hydrogen-hydrocarbon ratio is 10∶1.Selectivity within 80—200 ℃ range is better than others without open-loop and other side reactions.Selectivity can reach 100%. Therefore,a nickel-based catalyst from dual silicon source sol-gel preparation is an excellent catalyst for toluene hydrogenation.%以正硅酸乙酯（TEOS）、酞酸丁酯、硝酸镍为原料,采用溶胶-凝胶法制备了超细镍基催化剂,并进行了表征,通过改变工艺条件进行单因素实验,确定了超细镍基催化剂催化甲苯加氢的最合适工艺条件为：反应温度170℃、压力0.6 MPa、空速4 h-1、氢烃比10︰1,甲苯加氢生成甲基环己烷的转化率为100%,在80～200℃的实验范围内,选择性良好,并无开环及其它副反应的发生,甲基环己烷的选择性100%,实验表明溶胶-凝胶法制备的超细镍基催化剂是优良的甲苯加氢催化剂。