Mo-Ni/Al_2O_3催化剂对FCC汽油硫醚化反应的催化性能

Catalytic Performance of Mo-Ni/Al_2O_3 for Thioetherification of FCC Gasoline

针对当前FCC汽油选择性加氢脱硫技术中的硫醚化反应催化剂的研究,利用FCC汽油评价了Mo-Ni/Al_2O_3催化剂的硫醚化反应催化性能,并进行了工艺条件优化和催化剂寿命评价。结果表明,Mo-Ni/Al_2O_3催化FCC汽油硫醚化反应的优化条件为反应压力2.5 MPa、空速4h^(-1)、H_2/油体积比3、反应温度130℃,在该条件下Mo-Ni/Al_2O_3催化FCC汽油硫醚化反应运转600h,硫醇转化率维持在95%以上,二烯选择性加氢率在100%,烯烃未发生加氢现象,辛烷值保持恒定。

The thioetherification reaction is considered as the pretreatment step for the selective hydrogenation technology of FCC gasoline. The catalytic performance of Mo-Ni/A12O3 catalyst in thioetherification reaction was evaluated with FCC gasoline as feedstocks in a fixed bed reactor to find the optimal reaction conditions, and then, a long time test was carried on to study its stability. The results showed that the optimized reaction conditions for thioetherification were pressure of 2.5 MPa, space velocity of 4 h-1 , H2/oil volume ratio of 3 and temperature of 130℃, under which Mo-Ni/A12O3 catalyst could run 600 h with the mercaptans conversion keeping above 95 % and diene selective hydrogenation ratio of 100%, and no hydrogenation of olefins happening and the octane number of gasoline remaining.