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With the urgent global demand for greenhouse gas emission reduction, C4F7N has become an ideal substitute for SF6 gas due to its low GWP (about 1/1000 of SF6) and excellent insulation performance, and has received extensive attention in gas insulated switchgear (GIS). However, C4F7N is easy to decompose under arc discharge or high temperature conditions to produce toxic by-products such as CF4, C2N2, CF3CN and so on. As perfluorocarbons (PFCs), CF4 has a long atmospheric life of 50,000 years and a GWP value of 6,500, which aggravates global warming. C2N2 contains a highly toxic cyano group (–CN), which causes biological asphyxiation by inhibiting cytochrome oxidase and threatens aquatic and soil ecosystems; CF3CN has the persistence and cyan toxicity of perfluoroalkyl substances (PFAS), and its GWP value is 1030, which can endanger the immune system and reproductive system of organisms through bioaccumulation. Therefore, the efficient capture of the above decomposition products is crucial for the environmental safety application of C4F7N.

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Study on the Adsorption Characteristics of MIL-47 for C4F7N Decomposition Products

  • 会议论文

  • 发表日期：

    2026年

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  • Zhengyong Hu,
  • Song Zhang,
  • Peng Xu,
  • Guliang Zhou,
  • Zhihao Lu,
  • Yuhang Xue

摘要

With the urgent global demand for greenhouse gas emission reduction, C4F7N has become an ideal substitute for SF6 gas due to its low GWP (about 1/1000 of SF6) and excellent insulation performance, and has received extensive attention in gas insulated switchgear (GIS). However, C4F7N is easy to decompose under arc discharge or high temperature conditions to produce toxic by-products such as CF4, C2N2, CF3CN and so on. As perfluorocarbons (PFCs), CF4 has a long atmospheric life of 50,000 years and a GWP value of 6,500, which aggravates global warming. C2N2 contains a highly toxic cyano group (–CN), which causes biological asphyxiation by inhibiting cytochrome oxidase and threatens aquatic and soil ecosystems; CF3CN has the persistence and cyan toxicity of perfluoroalkyl substances (PFAS), and its GWP value is 1030, which can endanger the immune system and reproductive system of organisms through bioaccumulation. Therefore, the efficient capture of the above decomposition products is crucial for the environmental safety application of C4F7N.