论文部分内容阅读
A hydrotreating NiMo/γ-Al2O3 catalyst (12 wt％ Mo and 1,1 wt％ Ni) was prepared by impregnation of the support with the Anderson-type heteropolyoxomolybdate (NH4)4 Ni(OH)6 Mo6O18.Before impregnation of the support,it was modified with an aqueous solution of H3BO3,Co(NO3)2,or Ni(NO3)2.The catalysts were investigated using N2 adsorption,O2 chemisorption,X-ray diffraction,UV-Vis spectroscopy,Fourier transform infrared spectroscopy,temperature-programmed reduction,temperature-programmed desorption,and X-ray photoelectron spectroscopy.The addition of Co,Ni,or B influenced the A12O3 phase composition and gave increased catalytic activity for 1-benzothiophene hydrodesulfurization (HDS).X-ray photoelectron spectroscopy confirmed that the prior loading of Ni,Co or B increased the degree of sulfidation of the NiMo/γ-A12O3 catalysts.The highest HDS activity was observed with the NiMo/γ-Al2O3 catalyst with prior loaded Ni.