Hydrodesulfurization of Dibenzothiophene over Cobalt−Molybdenum Nitride Catalysts

Abstract

Molybdenum nitride (γ-Mo 2 N) and Co-promoted molybdenum nitrides (Co-Mo-N) catalysts with high surface area have been prepared from the reaction of MoO 3 and Co-Mo oxides with N 2 -H 2 and characterized by XRD and BET. The results of measurement of hydrodesulfurization-(HDS) of dibenzothiophene(DBT) supported the following conclusions: (1) γ-Mo 2 N and Co-Mo-N have higher HDS activity and selectivity for C-S bond breakage in dibenzothiophene; (2) different pretreatment conditions affect the HDS activity and selectivity; (3) the HDS activity of the γ-Mo 2 N is significantly improved with the addition of a Co promoter.