2012•Huagong jinzhanRequires access
Study on the hydrodesulfurization and the hydrodenitrogenation over Al_2O_3-ZrO_2 supported Ni_2P catalysts
Feng Li, Hua Song, Huayang Zhang
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Abstract
A series of Al2O3-ZrO2 composite oxides were prepared by impregnation-deposition method.Ni2P/Al2O3-ZrO2 catalysts were prepared by temperature-programmed reduction in a H2 flow.The supports and catalysts were characterized by X-ray diffraction(XRD),N2 adsorption-desorption and X-ray photoelectron spectroscopy(XPS).The effect of composite oxides on the performance of Ni2P catalysts was studied by thiophene hydrodesulfurization and pyridine hydrodenitrogenation.The results showed that the introduction of small amounts of ZrO2 on the surface of Al2O3 would not only keep high surface area of γ-Al2O3 but also reduce the contact between P or Ni and the surface of Al2O3,and therefore,promote the formation of Ni2P.Ni2P/Al2O3-ZrO2 catalyst made from Al2O3-ZrO2 support with 20% ZrO2 exhibited the highest activity.And the activity of catalyst would decrease with higher calcination temperature of supports.