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Reductive dechlorination of chlorobenzene in supercritical water catalyzed by Fe/ZrO2

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Abstract

Reductive dechlorination of chlorobenzene by Fe/ZrO2 in supercritical water was investigated. The effects of the operation conditions were studied. The dechlorination of chlorobenzene obeyed pseudo-first-order kinetics models. In supercritical water, the rate constant increases more rapidly with temperature than those in subcritical water. The results showed that the rate-determining step of dechlorination in subcritical water is diffusion; whereas the rate-determining of dechlorination in supercritical water is chemical reaction. The reaction mechanism in subcritical water might involve with an ionic mechanism; whereas the reaction mechanism in supercritical water might involve with a homolytic reaction.

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Acknowledgments

Financial supports from the National High Technology Research and Development Program of China (2006AA06Z378) and the National Natural Science Foundation of China (20777018) are sincerely acknowledged.

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Authors and Affiliations

  1. College of Environmental Science and Engineering, South China University of Technology, 510006, Guangzhou, People’s Republic of China

    Guang-Tao Wei, Chao-Hai Wei, Chao-Fei Wu & Feng-Mei He

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  1. Guang-Tao Wei
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  2. Chao-Hai Wei
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  3. Chao-Fei Wu
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Correspondence to Chao-Hai Wei.

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Wei, GT., Wei, CH., Wu, CF. et al. Reductive dechlorination of chlorobenzene in supercritical water catalyzed by Fe/ZrO2 . Environ Chem Lett 8, 165–169 (2010). https://doi.org/10.1007/s10311-009-0204-3

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  • DOI: https://doi.org/10.1007/s10311-009-0204-3

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