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Catalytic hydrolysis of trifluoromethane over alumina

Author

Listed:
  • Wenfeng Han
  • Yuliang Chen
  • Bibo Jin
  • Huazhang Liu
  • Hai Yu

Abstract

Catalytic hydrolysis over alumina was carried out at temperatures between 350 °C and 520 °C and gas hourly space velocity (GHSV) of 6000 h-super-−1. The effects of water vapor concentration, alumina phase, and Zn promoter as well as the reaction mechanism were investigated in detail. The results show that the presence of small amounts of water vapor (0.8%) significantly improves the activity of γ‐Al 2 O 3 , while higher water vapor concentration (>2.8%) does not further enhance the decomposition of CHF 3 . Compared with γ‐Al 2 O 3 and AlOOH, α‐Al 2 O 3 is inactive for the targeted reaction although it is stable under conditions studied (with the presence of HF product). Zn is an efficient promoter for the improvement of activity and stability of alumina catalyst. More attention is paid to the reaction and deactivation mechanism. Based on the experimental results and thermodynamic analysis, a reaction mechanism is proposed which explains the effect of water vapor and deactivation of catalyst reasonably.

Suggested Citation

  • 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.
    • Handle: RePEc:wly:greenh:v:4:y:2014:i:1:p:121-130
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    File URL: http://hdl.handle.net/10.1002/ghg.1376
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    Cited by:

    1. Jae†Yun Han & Chang†Hyun Kim & Boreum Lee & Seonju Jeong & Hankwon Lim & Kwan†Young Lee & Shin†Kun Ryi, 2017. "Experimental and simulation studies for reaction enhancement of catalytic CF4 hydrolysis by consecutive HF removal using a multi†stage catalyst†adsorbent reactor," Greenhouse Gases: Science and Technology, Blackwell Publishing, vol. 7(6), pages 1141-1149, December.
    2. Boreum Lee & Seonju Jeong & Sunggeun Lee & Ho‐Young Jung & Shin‐Kun Ryi & Hankwon Lim, 2017. "Preliminary techno‐economic analysis of a multi‐bed series reactor as a simultaneous CF 4 abatement and utilization process," Greenhouse Gases: Science and Technology, Blackwell Publishing, vol. 7(3), pages 542-549, June.
    3. 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.
    4. 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.

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