Preparation of Ni₂P/SBA-15 catalyst and research of its hydrodenitrogenation performance

The supported nickel phosphide catalysts were prepared by incipient wetness impregnation and in situ H₂ reduction method. The effects of the different P/Ni ratio, reduction temperature, and active component mass fraction on the performance of hydrodenitrogenation were examined. The samples were characterized by N₂ adsorption-desorption, X-ray diffraction (XRD), and temperature-programmed desorption of ammonia, and the effects of different temperature on the properties of catalyst hydrodenitrogenation (HDN) were evaluated on a continuous-flow fixed-bed reactor by using quinoline as the model molecules. The results show that when the nickel phosphorus ratio is 1, nickel phosphide mass fraction is 30%, and the reduction temperature is 650 ℃, its catalytic activity is best. At a reaction temperature of 360 ℃, pressure of 3 MPa, hydrogen/oil volume ratio of 500, and liquid hourly space velocity of 2 h^-1, the HDN conversion of quinoline can reach 85.6%.