Effect of Carrier Properties on Active Phase Structure and 1-Methylnaphthalene Hydrogenation Saturation Performance of NiMo Catalyst

By introducing cellulose A as a modifier in the carrier forming process and adjusting the proportion of cellulose A to adhesive solvent nitric acid, five carriers with different properties were obtained; further more, the corresponding catalysts were prepared by pore saturation impregnation and low temperature complexation process. The pore structure and surface properties of the carrier, the structure and morphology of the hydrogenation active phase of the catalyst were analyzed by N2 adsorption-desorption, mercury intrusion, IR spectroscopy of OH groups, post-extraction experiment, X-ray photoelectron spectroscopy and transmission electron microscopy. Besides, 1-methylnaphthalene was selected as a model compound to evaluate the hydrogenation saturation performance of the catalyst. The results show that with the increasing proportion of cellulose A, the pore volume and the proportion of extra large pores of the carrier increases; the amount of OH groups on the carrier surface and the proportion of basic OH groups and neutral OH groups that strongly interact with active metal also decrease; the sulfided catalyst forms more NiMoS phases and multi-layer stacked MoS2 lamellar crystals. The introduction of cellulose A can adjust the interaction bet-ween the metal and carrier, and form more high-activity hydrogenation active phase structures. Meanwhile, large pores conducive to reactant diffusion have been constructed, and improved the hydrogenation saturation reaction activity of 1-methylnaphthalene. © 2024 Editorial Office of Acta Petrolei Sinica. All rights reserved.