Hydrodesulfurization and isomerization performance of model FCC naphtha over sulfided Co(Ni)—Mo/Y catalysts

doi:10.1016/j.cjche.2024.10.001

中国化学工程学报 ›› 2025, Vol. 77 ›› Issue (1): 185-194.DOI: 10.1016/j.cjche.2024.10.001

Hydrodesulfurization and isomerization performance of model FCC naphtha over sulfided Co(Ni)—Mo/Y catalysts

Dongyang Liu, Guohao Zhang, Xinsheng Kang, Wenzhe Wu, Liang Zhao, Jinsen Gao, Chunming Xu

State Key Laboratory of Heavy Oil Processing, China University of Petroleum (Beijing), Beijing 102249, China

收稿日期:2024-09-06 修回日期:2024-10-14 接受日期:2024-10-15 出版日期:2025-01-28 发布日期:2024-10-19
通讯作者: Liang Zhao,E-mail:liangzhao@cup.edu.cn
基金资助:
This work was supported by the National Natural Science Foundation of China (U22B20140, 22021004, 22325808, 22393950), the National Key Research and Development Program of China (2020YFA0210900).

Hydrodesulfurization and isomerization performance of model FCC naphtha over sulfided Co(Ni)—Mo/Y catalysts

Dongyang Liu, Guohao Zhang, Xinsheng Kang, Wenzhe Wu, Liang Zhao, Jinsen Gao, Chunming Xu

State Key Laboratory of Heavy Oil Processing, China University of Petroleum (Beijing), Beijing 102249, China

Received:2024-09-06 Revised:2024-10-14 Accepted:2024-10-15 Online:2025-01-28 Published:2024-10-19
Contact: Liang Zhao,E-mail:liangzhao@cup.edu.cn
Supported by:
This work was supported by the National Natural Science Foundation of China (U22B20140, 22021004, 22325808, 22393950), the National Key Research and Development Program of China (2020YFA0210900).

摘要/Abstract

摘要： The process of deep hydrodesulfurization (HDS) in gasoline typically results in the saturation of olefins, leading to significant reductions in octane number. In this work, Y-supported Co(Ni)—Mo catalysts that with different Ni—Co content were prepared by the incipient wetness impregnation method, the structure and properties were characterized and analyzed using HRTEM, XPS, H₂-TPR, and NH₃-TPD. The isomerization of 1-hexene and 1-octene as well as the HDS of thiophene were studied by using model FCC naphtha. The incorporation of Ni was found to enhance the number of MoS₂ stacking layers, thereby improving the degree of sulfurization in Mo and subsequently increasing the desulfurization rate, with a maximum achieved desulfurization rate of 94.7%. When employing a Ni/Co ratio of 3:2, optimal synergy between Ni and Co is achieved, resulting in a greater presence of multi-layer stacked II-Co(Ni) MoS active phases. Additionally, appropriate Brønsted acidity levels are maintained to facilitate efficient olefin isomerization while preserving high HDS activity. As a result, the current isomerization yield stands at 58.2%(mass). These understandings shed light on the development of highly HDS and olefin isomerization catalysts.

关键词: Hydrodesulfurization, Isomerization, Co(Ni)–Mo/Y, Co(Ni) MoS

Abstract: The process of deep hydrodesulfurization (HDS) in gasoline typically results in the saturation of olefins, leading to significant reductions in octane number. In this work, Y-supported Co(Ni)—Mo catalysts that with different Ni—Co content were prepared by the incipient wetness impregnation method, the structure and properties were characterized and analyzed using HRTEM, XPS, H₂-TPR, and NH₃-TPD. The isomerization of 1-hexene and 1-octene as well as the HDS of thiophene were studied by using model FCC naphtha. The incorporation of Ni was found to enhance the number of MoS₂ stacking layers, thereby improving the degree of sulfurization in Mo and subsequently increasing the desulfurization rate, with a maximum achieved desulfurization rate of 94.7%. When employing a Ni/Co ratio of 3:2, optimal synergy between Ni and Co is achieved, resulting in a greater presence of multi-layer stacked II-Co(Ni) MoS active phases. Additionally, appropriate Brønsted acidity levels are maintained to facilitate efficient olefin isomerization while preserving high HDS activity. As a result, the current isomerization yield stands at 58.2%(mass). These understandings shed light on the development of highly HDS and olefin isomerization catalysts.

Key words: Hydrodesulfurization, Isomerization, Co(Ni)–Mo/Y, Co(Ni) MoS

Dongyang Liu, Guohao Zhang, Xinsheng Kang, Wenzhe Wu, Liang Zhao, Jinsen Gao, Chunming Xu. Hydrodesulfurization and isomerization performance of model FCC naphtha over sulfided Co(Ni)—Mo/Y catalysts[J]. 中国化学工程学报, 2025, 77(1): 185-194.

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Hydrodesulfurization and isomerization performance of model FCC naphtha over sulfided Co(Ni)—Mo/Y catalysts

Hydrodesulfurization and isomerization performance of model FCC naphtha over sulfided Co(Ni)—Mo/Y catalysts

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