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Effect of naphthalene quinoline and H2S on DBT hydrodesulfurization over unsupported NiMoW catalyst

  • Catalysis, Reaction Engineering
  • Published:
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Abstract

Unsupported catalysts have attracted much attention for high activity in comparison with the traditional supported catalyst. Meanwhile, the clear structure of unsupported catalysts is helpful for the recognition of active phase for conducting the industry production. The NiMoW unsupported catalyst was prepared by hydrothermal synthesis and characterized by BET, XRD and HRTEM. The effects of naphthalene, quinoline and H2S on the hydrodesulfurization reactivity of dibenzothiophene (DBT) were investigated in both a batch autoclave and a continuous 10 ml fixed bed micro-reactor over NiMoW and supported catalyst for comparison. The results showed that the hydrogenation reaction and the hydrogenolysis reaction occurred on different active sites. For supported catalyst, the inhibition was relatively weaker, and the inhibition of the hydrodesulfurization pathway was much higher than the direct desulfurization pathway. Although unsupported catalyst was very sensitive to quinoline and H2S in this experiment, the HDS ratio on the unsupported catalyst was maintained at a high level above 99.7%, which is attributed to the very high active site density of unsupported catalysts.

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Acknowledgements

This work was financially supported by the National Natural Science Fund of China (Grant No. 21676301), the National key R & D program of China (2017YFB0602500). Financial support from the program of China Scholarships Council (No. 201806455007) and Petro China Corporation Limited is also greatly appreciated.

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Authors and Affiliations

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

    Changlong Yin, Haonan Zhang, Tongtong Wu, Zhuyan Wu, Kunpeng Li, Yan Kong, Chengwu Dong & Chenguang Liu

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  1. Changlong Yin
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  2. Haonan Zhang
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  3. Tongtong Wu
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  4. Zhuyan Wu
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Correspondence to Changlong Yin.

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Yin, C., Zhang, H., Wu, T. et al. Effect of naphthalene quinoline and H2S on DBT hydrodesulfurization over unsupported NiMoW catalyst. Korean J. Chem. Eng. 36, 1983–1990 (2019). https://doi.org/10.1007/s11814-019-0409-5

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  • DOI: https://doi.org/10.1007/s11814-019-0409-5

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