Surfactant-Confined Synthesis of CoMoS Catalysts Using Polyoxometalate Precursors for Superior Fuel Hydrodesulfurization

• Published in: Energy & fuels Vol. 35; no. 3; pp. 2402 - 2415
• Main Authors: Huang, Tingting, Peng, Qingyi, Gai, Hengjun, Fan, Yu
• Format: Journal Article
• Language: English
• Published: American Chemical Society 04-02-2021
• Subjects: Environmental and Carbon Dioxide Issues
• ISSN: 0887-0624; 1520-5029
• DOI: 10.1021/acs.energyfuels.0c03364

This article proposes a novel surfactant-confined preparation method that uses polyoxometalates (POMs) as the precursor to synthesize CoMo/Al2O3 catalysts. The proposed technique anchors a decyltrimethylammonium bromide (DTAB)-confined POM precursor on the Al2O3 support under a subcritical condition, which weakens the interaction between the metals and support and promotes the generation of reduced-size MoS2 phases with a high dispersion degree and improved stacking. The as-prepared CoMo/Al2O3 catalysts have a higher concentration of accessible CoMoS active sites than their counterparts synthesized by impregnation and hydrothermal methods, endowing them with superior catalytic activity for the hydrodesulfurization (HDS) of dibenzothiophene (DBT) and fluid catalytic cracking (FCC) diesel.