Effect of Mo on Performance of Ni-B/Boehmite Amorphous Alloy Catalyst for Thiophene Hydrodesulfurization

doi:10.3724/SP.J.1088.2012.10750

Abstract

Abstract: A series of Ni-Mo-B/boehmite amorphous alloy catalyst samples with different Mo contents were prepared by the impregnation-chemical reduction method. Thiophene hydrodesulfurization (HDS) was chosen as a probe reaction to investigate the influence of Mo contents on HDS activity of the Ni-Mo-B/boehmitecatalyst. The catalyst samples were characterized by X-ray diffraction, differential scanning calorimetry, inductive coupled plasma, temperature-programmed reduction, temperature-programmed desorption, X-ray photoelectron spectroscopy, and transmission electron microscopy. The addition of Mo increased the dispersion of Ni active species, improved the thermal stability of Ni-B/boehmite, decreased the reduction temperature, weakened the strength of Ni^_H bonds, increased adsorption centers and acidity, and therefore promoted catalyst activity dramatically. At low temperature of 220 ^oC, when the Mo/Ni mass ratio is 12%, the conversion of thiophene is the highest, up to 73.9%.

Key words: amorphous alloy, molybdenum, nickel, boron, boehmite, thiophene, hydrodesulfurization

QI Xue, SHI Qiu-Jie, CHEN Wei-Qing, ZHANG Rong-Bin. Effect of Mo on Performance of Ni-B/Boehmite Amorphous Alloy Catalyst for Thiophene Hydrodesulfurization[J]. Chinese Journal of Catalysis, 2012, 33(3): 543-549.

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