Novel alumina-supported Ni-Mo hydrodesulfurization (HDS) catalysts were prepared via assembly of Mo and Al precursors induced by tetradecylamine (TDA). Compared with conventional impregnation, this assembly method improves Mo dispersion, weakens metal-support interactions, enhances Ni modification at MoS2 edge sites, and produces more NiMoS phases on Al2O3. The optimal NiMoS microstructure was obtained by modulating the TDA/Mo ratio in the assembly. A microstructure-activity correlation indicated that the S vacancies at the NiMoS corner sites favored σ-adsorption and direct desulfurization of 4,6-dimethylbenzothiophene (4,6-DMDBT), and those at the NiMoS edge sites promoted C-S breaking in hydrogenated derivatives of 4,6-DMDBT. Among these catalysts, NiTMo-2.0/Al2O3, which had the most corner and edge S vacancies, exhibited the highest reaction rate constant of 5.89 × 10-7 mol●g-1●s-1 and the highest desulfurization ratio of 99.5% in HDS of 4,6-DMDBT.

Tetradecylamine-induced assembly of Mo and Al precursors to prepare efficient NiMoS/Al2O3 catalysts for ultradeep hydrodesulfurization

Where thousands of chemistry professionals meet to share ideas and advance scientific and technical knowledge. Spring 2023 abstracts, posters, and presentations will launch at the end of March.

ACS Spring 2023

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.