Hydrotreating of Raw Oil Materials оver Ni6-РMonW(12–n)(S)/Al2O3 Catalysts

To develop an effective catalyst for hydrotreating of petroleum feedstock, the activity of Ni-Mo-W sulfide catalysts was studied in dependence on the molar ratio Mo/W. Trimetallic catalysts with the composition Ni6-PMonW12-n/Al2O3 (Ni6-PMonW12–n(S)/Al2O3 after sulfiding), where n = 0÷12, were synthesized. The morphology of the particles of the active phase of sulfide samples was studied by highresolution transmission electron microscopy. The following parameters were calculated: the mean length of layers of the phase NiMo(W)S, the average number of layers in the crystallite, the number of atoms Mo(W) in the layer, and the portion of atoms Mo(W) in edge and corner positions. The influence of the molar ratio Mo/W on the catalytic activity of the prepared samples was studied in the following processes: the hydrogenolysis of dibenzothiophene, hydrodesulfurization (HDS) and hydrogenation of olefins and aromatic compounds during hydrotreating of a mixture of diesel fractions and vacuum gasoil. It was found that in the HDS and hydrogenation, the most active sample is the sample with the molar ratio Mo/W = 1/1.

hydrotreating, catalysts, heteropolyacids, molybdenum, tungsten, dibenzothiophene, diesel fractions, vacuum gasoil

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