关键词: 磷化镍, 固相反应, 二苯并噻吩, 加氢脱硫

Abstract: Silica-supported Ni2P catalysts were prepared by the solid phase reaction of nickel hypophosphite under N2 atmosphere and low temperature. X-ray diffraction (XRD), N2 adsorption-desorption isotherms, and transmission electron microscopy (TEM) were used to analyze and obtain the structure parameters of the prepared catalysts. The specific surface area of a Ni2P/SiO2 catalyst having 20% Ni2P was 226.2 m2/g; the active components, Ni2P, were well dispersed on the SiO2 support with a particle size of 5~8 nm as shown by TEM analysis. The catalytic performance of this catalyst was evaluated in a fixed-bed reactor for hydrodesulfurization using a model feed containing 2% dibenzothiophene (DBT). Under the conditions of a reaction temperature of 340 ℃, a hydrogen partial pressure of 2.0 MPa, a LHSV of 2.0 h-1 and a H2/oil volume ratio of 300, the conversion of DBT reached 99.1%. Furthermore, the desulfurization reactions had a strong tendency of following direct desulfurization pathway.

Key words: nickel phosphide, solid phase reaction, dibenzothiophene, hydrosulfurization