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Selective Liquid-phase Hydrodechlorination of Chlorotrifluoroethylene over Palladium-Supported Catalysts: Activity and Deactivation

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Abstract

Liquid-phase hydrodechlorination of chlorotrifluoroethylene (CTFE) to trifluoroethylene (TrFE) with molecular hydrogen was studied over palladium-supported catalysts. BaSO4, Al2O3 and activated carbon (AC) were used as supports, respectively. The results showed that the Pd/AC catalysts exhibit higher activity than Pd/BaSO4 and Pd/Al2O3. The treatment of activated carbon with HNO3 led to a considerable increase of surface functional groups containing oxygen atoms, which resulted in a higher dispersion of palladium on the supports and enhancement of catalytic activity. The stability of the catalyst was investigated, one reason for the inhibition was the accumulation of NaCl on the surface of Pd/AC that blocks the pores of carbon support. The activity of Pd/AC could partially recovered by washing with water. The other irreversible deactivation of the catalyst are from the change of particle size and the pore structure, leaching of Pd, a decrease of BET surface area and Pd surface area of Pd/AC catalyst.

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Acknowledgements

This work is financially supported by Shanghai 3F New Materials CO., Ltd. and Shanghai Huayi (Group) Company.

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Authors and Affiliations

  1. East China University of Science and Technology, UNILAB Research Center of Reaction Engineering, State-key Laboratory of Chemical Engineering, Shanghai, 200237, China

    Bao-Chuan Meng, Zhao-Yang Sun, Jin-Peng Ma, Gui-Ping Cao & Wei-Kang Yuan

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  1. Bao-Chuan Meng
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  2. Zhao-Yang Sun
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  3. Jin-Peng Ma
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Correspondence to Gui-Ping Cao.

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Meng, BC., Sun, ZY., Ma, JP. et al. Selective Liquid-phase Hydrodechlorination of Chlorotrifluoroethylene over Palladium-Supported Catalysts: Activity and Deactivation. Catal Lett 138, 68–75 (2010). https://doi.org/10.1007/s10562-010-0370-8

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  • DOI: https://doi.org/10.1007/s10562-010-0370-8

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