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Promotion of O 2 on the co‐pyrolysis of CHF 3 and CH 4 for VDF synthesis

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Listed:
  • Wenfeng Han
  • Yanyan Song
  • Wucan Liu
  • Luteng Yang
  • Haodong Tang
  • Shucheng Wang
  • Zhixing Wu
  • Jianjun Zhang

Abstract

Co‐pyrolysis of CHF 3 and CH 4 in the presence of O 2 was investigated in a tubular reactor at temperatures between 700 and 860°C, atmospheric pressure, and residence time of 1.64 s. Under reaction conditions studied, introduction of O 2 in the CHF 3 and CH 4 feed significantly improves the conversion of CH 4 , and while conversion of CHF 3 almost stays unchanged. In the absence of O 2 , CH 4 is activated by chain reactions which are initiated by the surface of the reactor. Following the introduction of O 2 , a series of additional chain reactions (reactions of CH 4 with O 2 , O•, •HO 2 and •OH radicals) generate more •CH 3 radicals which are one of the key species for the formation of target product, CH 2 =CF 2 . Therefore, formation rate of CH 2 =CF 2 is doubled under optimal reaction conditions. The suitable O 2 /CH 4 feed ratio is suggested to be 0.06 for the formation of CH 2 =CF 2 . In addition, introduction of O 2 in the feed decreases the formation of major byproduct C 2 F 4 and C 2 HF 3 significantly. After O 2 is introduced, as more H• radicals are produced, improved formation rate of C 2 H 3 F results. © 2017 Society of Chemical Industry and John Wiley & Sons, Ltd.

Suggested Citation

  • Wenfeng Han & Yanyan Song & Wucan Liu & Luteng Yang & Haodong Tang & Shucheng Wang & Zhixing Wu & Jianjun Zhang, 2017. "Promotion of O 2 on the co‐pyrolysis of CHF 3 and CH 4 for VDF synthesis," Greenhouse Gases: Science and Technology, Blackwell Publishing, vol. 7(5), pages 891-902, October.
    • Handle: RePEc:wly:greenh:v:7:y:2017:i:5:p:891-902
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    File URL: http://hdl.handle.net/10.1002/ghg.1687
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    References listed on IDEAS

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    1. Wenfeng Han & Yuliang Chen & Bibo Jin & Huazhang Liu & Hai Yu, 2014. "Catalytic hydrolysis of trifluoromethane over alumina," Greenhouse Gases: Science and Technology, Blackwell Publishing, vol. 4(1), pages 121-130, February.
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    Cited by:

    1. Yimin Cheng & Jinchao Wang & Wenfeng Han & Yanyan Song & Wucan Liu & Luteng Yang & Shucheng Wang & Zhixing Wu & Haodong Tang & Jianjun Zhang & Michael Stockenhuber & Eric M. Kennedy, 2018. "Catalytic coupling of CH4 with CHF3 for the synthesis of VDF over LaOF catalyst," Greenhouse Gases: Science and Technology, Blackwell Publishing, vol. 8(3), pages 587-602, June.

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