二苯并噻吩 (DBT)在 80℃下与CoMo/γ Al2 O3 催化剂混合并放置 2 4h ,即可在催化剂表面发生自发单层分散 .通过XRD测定出其分散阈值为 0 15 g/g ,大于计算值 0 12 g/g(平躺吸附密置单层分散容量 ) ,排除实验误差后可以推测DBT在CoMo/γ Al2 O3 表面存在通过硫原子的端链吸附 .FT IR和LRS的分析结果与上述推测相一致 ,说明DBT可能通过硫原子吸附在CoMo/γ Al2 O3 表面的酸中心上 DBT was spontaneously monolayer dispersed on the catalyst surface after being mixed with CoMo / γ Al 2 O 3 catalyst at 80 ℃ for 2 4 h and its dispersion threshold was 0 15 g / g as determined by XRD The calculated value of 0 12 g / g (monolayer dispersion capacity in the horizontal position) can eliminate the experimental error and it can be inferred that the DBT adsorbed on the surface of CoMo / γ Al 2 O 3 through the sulfur atom. The analytical results of FT IR and LRS The above conjecture is consistent, indicating that DBT may be adsorbed by the sulfur atom on the acid sites on the surface of CoMo / γ Al 2 O 3