关键词: 溶胶凝胶, 超细镍基催化剂, 甲基环己烷, 甲苯

Abstract: 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.

Key words: sol-gel, supported ultrafine nickel catalysts, methylcyclohexane, toluene