NiMo/gamma-Al2O3 Catalysts from Ni Heteropolyoxomolybdate and Effect of Alumina Modification by B, Co, or Ni

作者：Palcheva Radostina; Kaluza Ludek^*; Spojakina Alla; Jiratova Kvetuse; Tyuliev Georgi

来源：Chinese Journal of Catalysis, 2012, 33(6): 952-961.

DOI：10.1016/S1872-2067(11)60376-8

• nickel
• cobalt
• boron
• nickel heteropolyoxomolybdate
• hydrodesulfurization

A hydrotreating NiMo/gamma-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 N-2 adsorption, O-2 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 Al2O3 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/gamma-Al2O3 catalysts. The highest HDS activity was observed with the NiMo/gamma-Al2O3 catalyst with prior loaded Ni.

• 出版日期2012-6