Abstract
Hydrodesulfurization (HDS) of dibenzothiophene and hydrodenitrogenation (HDN) of aniline over CoMo on TiO 2ZrO 2V 2O 5 catalysts and over CoMo on γ-Al 2O 3 catalysts were investigated and compared in a continuous-flow microreactor at 240–350 °C and 3.55 MPa. HDS and HDN activities on Ti/Zr/V-supported catalysts depended on the amounts and the order of impregnation of molybdenum and cobalt. It was found that Ti/Zr/V-supported catalysts had higher HDS and HDN activities than alumina-supported catalysts. The optimal amounts of CoO and MoO 3 on TiO 2ZrO 2V 2O 5 were much less than on alumina. Moreover, the mutual inhibition of HDS and HDN over Ti/Zr/V-supported catalysts was less pronounced than that over alumina-supported catalysts. The Ti/Zr/V-supported catalyst was also more active than the commercial catalyst, HR-306, in hydrodesulfurization of petroleum feedstocks.
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