Synthesis of bifunctional highly-loaded NiMoW catalysts and their catalytic performance of 4,6-DMDBT HDS

A bifunctional highly-loaded NiMoW catalyst was prepared via hydrothermal reaction method with the incorporation of USY zeolite during synthetic process of precursor. The obtained samples were characterized by N-2 physisorption, XRD, Py-FTIR, and HRTEM. Combined with 4,6-DMDBT HDS activity results, Bronsted acid sites have been successfully generated in catalysts, and facilitated the demethylation and cracking reaction, as well as the DDS activity. The high activity of thus-achieved bifunctional catalysts can be attributed to the appropriate acid amount and the synergistic effect of Lewis and Bronsted acid sites combining with desirable textural properties and suitable stacking morphology of MoS2/WS2 slabs. (C) 2016 Elsevier B.V. All rights reserved.