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Hydrodeoxygenation of o-Cresol Over Mo2C Modified by O2 Plasma

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Abstract

Due to the particularity of the carburizing process, it is unavoidable to generate deposited carbon on the surface of molybdenum carbide, which has a negative effect on its catalytic performance. In this paper, the molybdenum carbide catalyst was prepared by CH4 and H2 plasma and modified by O2 plasma (0.5 vol % O2/Ar) to reduce deposited carbon on its surface. Besides, the effect of discharge time on the amount of deposited carbon and the states of molybdenum active sites were investigated at 16 W. The results of XRD shows that the Mo2C modified by O2 plasma had little influence in their particles size but Mo2C was gradually oxidized with the extension of discharge time. The characterizations by means of H2-TPR, XPS, Raman, CO2-TPO and TGA revealed that the amount of deposited carbon on the surface of Mo2C after O2 plasma treatment was significantly reduced. It was found that the disordered carbon could be removed more easily than the ordered graphitic carbon. H2-TPD characterization revealed that Mo2C after O2 plasma treatment exposed more active sites. Mo2C-x were evaluated in the hydrodeoxygenation of o-cresol, and the results showed that the Mo2C after O2 plasma treatment for 1 h showed the highest catalytic performance and the toluene yield was nearly 80%.

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Acknowledgements

This research was financially supported by the Natural Science Foundation of China (22172015, 21972014) and International S&T Cooperation Program of China (2016YFE0109800).

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Authors and Affiliations

  1. State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian, 116024, People’s Republic of China

    Zihan Yu, Zhiquan Yu, Yao Wang, Yingya Liu & Anjie Wang

  2. State Key Laboratory of Material for Marine Equipment and Application, Anshan, 114009, People’s Republic of China

    Zihan Yu

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Correspondence to Yao Wang.

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Yu, Z., Yu, Z., Wang, Y. et al. Hydrodeoxygenation of o-Cresol Over Mo2C Modified by O2 Plasma. Plasma Chem Plasma Process 43, 533–545 (2023). https://doi.org/10.1007/s11090-022-10310-x

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