载体复合方式对加氢裂化催化剂性能的影响

以β分子筛、Y分子筛和无定形硅铝（ASA）为载体组分，考察了加氢裂化催化剂制备过程中，采用不同复合方式制备载体对催化剂理化性质及性能的影响。研究发现，原位复合所制备载体的催化剂比表面积、孔体积、平均孔径低于将分子筛与ASA进行机械混合所制备载体的催化剂。以大庆减压蜡油的加氢精制油为原料，在温度360 ℃、压力8.0 MPa、空速2.0 h-1、氢油体积比1 000的条件下，原位复合载体的催化剂上转化率、石脑油选择性、化工原料收率低于机械混合方式制备载体的催化剂；而原位复合载体的催化剂上液体收率高于机械混合所制备载体的催化剂。

EFFECT OF PREPARATION METHOD OF COMPOSITE SUPPORT ON PHYSICOCHEMICAL PROPERTY OF HYDROCRACKING CATALYST

Using β，Y molecular sieve and amorphous silica alumina (ASA) as raw materials for composite support preparation, hydrocracking catalysts with composite supports prepared by different methods were made to see the effect of support on physicochemical properties. It is discovered that the surface area, pore volume and average pore size of the catalyst with composite support made in-situ are lower than that of the catalyst with mechanical mixed molecular sieve and ASA composite support. The conversion rate, naphtha selectivity and chemical raw material yield are lower than the latter at the conditions of 360 ℃，8.0 MPa，LHSV of 2.0 h-1 and H2/oil of 1000 using hydrotreated Daqing VGO as feed , but higher liquid yield than the latter.