Oxidative Desulfurization of model diesel on MoO3/Al2O3 Catalyst: Effect of Drying Method and Mo Loading

The mesoporous MoO3/γ-Al2O3 catalyst was prepared by incipient wetness impregnation method aiming to investigate the effect of drying method and molybdenum content on the catalystproperty and performance towards the oxidation of benzothiophene (BT), dibenzothiophene(DBT) and 4,6-dimethyle dibenzothiophene (4,6-DMDBT) with H2O2 for deep oxidative desulfurization of diesel. The catalyst was characterized by XRD, BET, BJH and SEM method.The catalyst with 10wt.% and 15wt.% Mo content represented same optimum performance for DBT and 4,6-DMDBT removal, but a catalyst with 10wt.% Mo showed higher efficiency than15wt.% Mo for BT conversion. The SEM images showed that use of rotary evaporator in drying step reached a more homogenous impregnation. The oxidation reactivity of different sulfur compounds was studied which followed the order of DBT>4,6-DMDBT>>BT

Keywords:

desulfurization , oxidation , MoO3/Al2O3 catalyst