期刊
FRONTIERS OF CHEMICAL SCIENCE AND ENGINEERING
卷 15, 期 5, 页码 1088-1098出版社
SPRINGER
DOI: 10.1007/s11705-020-1969-y
关键词
CoMo catalyst; boron modification; surface acidity; microwave heating; selective hydrodesulfurization
资金
- National Natural Science Foundation of China [21476258]
The study shows that modification, especially under microwave treatment, can significantly enhance the performance of CoMo/γ-Al2O3 catalysts, reduce the interaction between active components and supports, thereby improving HDS performance and olefin selectivity.
Catalytic hydrodesulfurization (HDS) technique is widely used for clean gasoline production. However, traditional HDS catalyst (CoMo/gamma-Al2O3) exhibits high hydrogenation performance of olefins (HYDO), resulting in the loss of gasoline octane number. To achieve high HDS/HYDO ratio, the key issue is to reduce the interaction between active metals and the support, therefore, in this research, the modified CoMo/gamma-Al2O3 catalysts with various boron amounts were investigated under traditional or microwave heating. The effects of preparing methods as well as boron amounts on the active phase, acidic properties and HDS catalytic activities were examined. Results show that the modification, especially under microwave treatment, can significantly weaken the interaction between the active component and the support by enlarging the surface area and pore diameter, and reducing the acidity of the support. As a result, the stacking numbers of MoS2 slabs were obviously improved by the modification and microwave treatment, contributing to higher edge/ rim ratio, and resulting in higher HDS performance and selectivity to olefin.
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