Atomic ratio effect on catalytic performance of FeW-based carbides and nitrides on thiophene hydrodesulfurization

► New catalysts for HDS of thiophene based on FeW carbides and nitrides. ► Alumina-supported FeW carbides and nitrides are synthesized by TPR method. ► Thiophene HDS catalytic activity decreased with increasing atomic ratio Fe/(Fe + W). ► Iron is not a good promoter to tungsten sulfides, carbides or nitrides.