Hydrocracking of vacuum gas oil in the presence of supported nickel-tungsten catalysts

作者：Ivanova A S^*; Korneeva E V; Bukhtiyarova G A; Nuzhdin A L; Budneva A A; Prosvirin I P; Zaikovskii V I; Noskov A S

来源：Kinetics and Catalysis, 2011, 52(3): 446-458.

DOI：10.1134/S0023158411030098

The supports containing 70% Al(2)O(3) and 30% beta zeolite (AZ-1 and AZ-2), which differed in mixing procedures, and the Ni-W/AZ-1 and Ni-W/AZ-2 catalysts were characterized using an adsorption technique, high-resolution electron microscopy, IR spectroscopy, and X-ray photoelectron spectroscopy and tested in the hydrocracking reaction of vacuum gas oil (VGO). It was found that the supports differed in texture characteristics and surface Lewis acidity at the same composition and similar concentrations of Bronsted acid sites. The formation of Ni-W-S sulfide species on the surfaces of both of the supports occurred in different manners: multilayer Ni-W-S sulfide species were formed on AZ-1 (S (sp) = 220 m(2)/g), whereas single-layer species were mainly formed on AZ-2 (S (sp) = 380 m(2)/g). It was found that catalysts containing multilayer Ni-W-S sulfide species, which were characterized by a higher degree of sulfidation, provided a higher yield of diesel fuel upon the hydrocracking of VGO, whereas catalysts containing single-layer Ni-W-S sulfide species were more active in the reactions of VGO hydrodesulfurization and hydrodenitration.

• 出版日期2011-5