Preparation and Characterization of a Novel Hydrodesulfurization Catalyst

The oxidic precursor,NiO-MoO3/γ-Al2O3,was synthesized by the successive impregnation method.The catalysts resulted from the sulfidation,the temperature programmed carburization(TPC),and TPC followed by sulfidation of this precursor,as well as a kind of commercial hydrodesulfurization(HDS) catalyst,were evaluated with dibenzothiophene HDS performance and were characterized by XRD and XPS.It was observed that the sulfidation promoted HDS activity and stability of oxycarbide catalyst,which was attributed to the transformation of some Lewis acid sites to Brnsted acid sties favorable for HDS,while some hydrogenation catalytic performance and a majority of active sites were retained at the same time.