二苯并噻吩在MoO3/γ-Al2O3催化剂上的自发单层分散

Dibenzothiophene(DBT) can disperse spontaneously on the surface of MoO3/γ-Al2O3 catalyst under 80 ℃ and 24 h. It is determined by XRD that the dispersion threshold of DBT on MoO3/γ-Al2O3 catalyst is 0.23 g/g. This value is obviously higher than the calculated value of monolayer dispersion of DBT assuming that DBT adsorbed flatly on the surface of MoO3/γ-Al2O3 catalyst. It is inferred from this result that the adsorption of DBT on the surface of MoO3/γ-Al2O3 catalyst may include both two status, one is the end-on manner through the adsorption of sulfur atom, another is the flat manner through the adsorption of π electrons of DBT molecule. The result of FT-IR analysis does not contradict with the inference. DBT may be adsorption on the acidic sites in the surface of MoO3/γ-Al2O3 catalyst via sulfur atom.