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Mechanistic Studies on the Coupled Reaction of n-Hexane and Ethanol Over HZSM-5 Zeolite Catalyst

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Abstract

The coupled reaction of n-hexane and ethanol over HZSM-5 zeolite has been, for the first time, investigated with a pulse-reaction system. The catalytic reaction results showed an improvement of the initial conversion activity of n-hexane when ethanol was introduced as co-reactant. The FT-IR analysis revealed that the ethanol molecules adsorbed on Brønsted acidic sites were immediately transformed into surface ethoxy groups, which were active species for converting n-hexane and improving the initial conversion activity of n-hexane by a bimolecular hydride transfer mode. Also, the catalytic tests suggested that alkenes resulting from the transformation of ethanol could not enhance the initial conversion of n-hexane compared to active ethoxy groups at the shortest contact time. A mechanism involving the ethoxy groups was proposed to understand the coupled reaction of ethanol and n-hexane.

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Authors and Affiliations

  1. Natural Gas Utilization and Applied Catalysis Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, P.O. Box 110, 116023, Dalian, People’s Republic of China

    Jinlong Wan, Fuxiang Chang, Yingxu Wei, Qinghua Xia & Zhongmin Liu

  2. Graduate School of the Chinese Academy of Sciences, Beijing, 100039, People’s Republic of China

    Jinlong Wan

  3. Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, Hubei University, Wuhan, 430062, People’s Republic of China

    Qinghua Xia

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  1. Jinlong Wan
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  2. Fuxiang Chang
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  3. Yingxu Wei
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  4. Qinghua Xia
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  5. Zhongmin Liu
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Correspondence to Zhongmin Liu.

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Wan, J., Chang, F., Wei, Y. et al. Mechanistic Studies on the Coupled Reaction of n-Hexane and Ethanol Over HZSM-5 Zeolite Catalyst. Catal Lett 127, 348–353 (2009). https://doi.org/10.1007/s10562-008-9687-y

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  • DOI: https://doi.org/10.1007/s10562-008-9687-y

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