高等学校化学学报

高等学校化学学报 ›› 1998, Vol. 19 ›› Issue (10): 1677.

• 研究简报 • 上一篇    下一篇

合成CFC-12替代物HFC-134a的CrF3/AlF3催化剂研究(V)——CrF3与AlF3的相互作用

吕剑1, 石磊1, 李惠黎1, 彭少逸2   

  1. 1. 西安近代化学研究所, 西安, 710065;
    2. 中国科学院山西煤炭化学研究所, 太原, 030001
  • 收稿日期:1997-08-12 出版日期:1998-10-24 发布日期:1998-10-24
  • 通讯作者: 吕剑,男,34岁,博士,高级工程师.
  • 作者简介:吕剑,男,34岁,博士,高级工程师.
  • 基金资助:

    国家自然科学基金(批准号:29603006)资助课题.

Studies on the CrF3/AlF3 Catalyst for Synthesis of HFC-134a as a Substitute for CFC-12(V)——Interaction of CrF3 and AlF3

LU Jian1, SHI Lei1, LI Hui-Li1, PENG Shao-Yi2   

  1. 1. Xi'an Modern Chemistry Research Institute, Xi'an, 710065;
    2. Institute of Coal Chemistry, Academia Sinica, Taiyuan, 030001
  • Received:1997-08-12 Online:1998-10-24 Published:1998-10-24

PDF (PC)

关键词: CrF3与AlF3的相互作用, 转化频率, 1, 1, 1, 2-四氟乙烷, 活性物种

Abstract: The effects of Cr 3+ content in CrF3/AlF3 catalysts on activity for synthesis of HF 134a from reaction of HCFC133a with HFwere investigated. FTIR, EPRand XPShave been employed to characterize the CrF3/AlF3 catalysts. The results show that CrF3 existed in a monolayer dispersion where the interaction between CrF3 and AlF3 support became stronger when Cr 3+ content less than1%. The CrF3/AlF3 catalyst with 0.1% Cr 3+ exhibits the highest turnover frequency. The residual oxygen in the catalyst forms surface active species of CrAlOm Fn from the interaction of CrF3 and AlF3, which is the cause of high selectivity to HFC-134a in F/Cl exchange reaction.

Key words: Interaction of CrF3 and AlF3, Turnover frequency, 1,1,2 Tetrafluoroethane, Active species(Ed.: Y, X)

中图分类号: 

TrendMD: