Citation: LIU Bin, LIU Lei, CHAI Yong-ming, ZHAO Jin-chong, LIU Chen-guang. Essential role of promoter Co on the MoS₂ catalyst in selective hydrodesulfurization of FCC gasoline[J]. Journal of Fuel Chemistry and Technology, ;2018, 46(4): 441-450. shu

Essential role of promoter Co on the MoS₂ catalyst in selective hydrodesulfurization of FCC gasoline

State Key Laboratory of Heavy Oil Processing, Key Laboratory of Catalysis of China National Petroleum Corporation(CNPC), China University of Petroleum(East China), Qingdao 266580, China

Corresponding author: LIU Bin, liubin@upc.edu.cn
Received Date: 21 November 2017
Revised Date: 26 February 2018

Fund Project: the Fundamental Research Funds for the Central Universities 17CX02061the Qingdao Applied Basic Research Project 17-1-1-73-jchthe National Natural Science Foundation of China 21776314the Shandong Provincial Natural Science Foundation of China ZR2016BL22the State Key Laboratory of Heavy Oil Processing SLKZZ-2017005the National Key Research and Development Program of China 2017YFB0306600The project was supported by the National Natural Science Foundation of China (U1662119, 21776314), the National Key Research and Development Program of China (2017YFB0306600), the Shandong Provincial Natural Science Foundation of China (ZR2016BL22), the Qingdao Applied Basic Research Project (17-1-1-73-jch), the Fundamental Research Funds for the Central Universities (17CX02061) and the State Key Laboratory of Heavy Oil Processing (SLKZZ-2017005)the National Natural Science Foundation of China U1662119

Figures(6)

The essential role of Co on the MoS₂ catalyst in selective hydrodesulfurization (HDS) of FCC gasoline was investigated with ammonium tetrathiomolybdate supported on alumina modified with various amount of Co sulfide. According to the data obtained by XRD, HRTEM, XPS, H₂-TPR and Py-FTIR analysis, the Co species could significantly affect the microstructure and composition proportion of the active phase, and thus induced the enormous differences in catalytic properties. The evaluation results demonstrated that the Co atoms tending to form the CoMoS phase as Co/Mo(atomic ratio) < 0.2 could greatly improve the HDS activity, but slightly improve the hydrogenation (HYD) activity of olefins. The spillover hydrogen produced by the formation of Co₉S₈ phase as 0.2 < Co/Mo(atomic ratio) < 0.6 greatly improved the HDS activity, but showed almost no effect on the HYD of olefins. The excess Co could inevitably form some large size Co₉S₈ phase as Co/Mo(atomic ratio) > 0.6, which would hinder the mutual contact of the reactants and the active sites, and thus lead to the decrease of the HDS activity and selectivity. The obtained results were useful for developing highly effective hydrotreating catalyst.
- selective hydrodesulfurization,
- active phase,
- Co/Mo atomic ratio,
- spillover hydrogen
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Essential role of promoter Co on the MoS₂ catalyst in selective hydrodesulfurization of FCC gasoline