Study on Pyrolysis of Polytetrafluoroethylene in SF<sub>6</sub>

YANG Ren; GUO Meng; YANG Jinghui; WANG Jinxing; ZHANG Xiao; ZHANG Weiqiang

doi:10.13296/j.1001-1609.hva.2024.05.024

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Study on Pyrolysis of Polytetrafluoroethylene in SF₆

Research & Analysis | 更新时间：2025-04-26

- Study on Pyrolysis of Polytetrafluoroethylene in SF₆
- High Voltage Apparatus Vol. 60, Issue 5, Pages: 189-193(2024)
- 作者机构：
  
  1.国网陕西省电力公司电力科学研究院，西安　 710054
  2.陕西师范大学化学化工学院西安市金属有机材料化学重点实验室，西安　 710119
  3.国网陕西省电力公司，西安　 710054
- 作者简介：
- 基金信息：
  
  State Grid Shaanxi Electric Power Company Science and Technology Project(5226ky19004D)
- DOI：10.13296/j.1001-1609.hva.2024.05.024
  CLC：
- Received：09 October 2023，
  
  Revised：11 December 2023，
  
  Published：16 May 2024
- 稿件说明：
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YANG Ren, GUO Meng, YANG Jinghui, et al. Study on Pyrolysis of Polytetrafluoroethylene in SF₆[J]. High voltage apparatus, 2024, 60(5): 189-193.
DOI：

YANG Ren, GUO Meng, YANG Jinghui, et al. Study on Pyrolysis of Polytetrafluoroethylene in SF₆[J]. High voltage apparatus, 2024, 60(5): 189-193. DOI： 10.13296/j.1001-1609.hva.2024.05.024.

摘要

设备内局部过热故障会产生全氟碳烃类特征分解产物。为了探明氟碳烃分解产物与PTFE热分解劣化过程的内在联系，本研究采用同步差示扫描量热/热重/色谱联用技术，构建可追踪到氟碳烃分解产物的六氟化硫热分解反应模型。系统地将热解升温速率/分解温度/分解产物体积分数条件与实验确定的特征分解产物/绝缘材料侵蚀联系起来，阐明了500～600 ℃温度区间SF

-PTFE热分解形成六氟乙烷、八氟丙烷的化学反应历程。该结果可直接应用于局部过热故障造成的断路器喷口侵蚀进行定性定量检测，相关氟化分解反应为喷口故障精准分析提供实验和理论依据。

Abstract

Partial over-heating inside the SF

equipment will generate the decomposition product with perfluorocarbon characteristic. For exploring the intrinsic relationship between the decomposition products of fluorocarbons and the thermal decomposition degradation process of PTFE

the synchronous di

fferential scanning calorimetry (DSC)/thermogravimetry (TG)/gas chromatography (GC) joint technology is used to construct a thermal decomposition reaction model of sulfur hexafluoride (SF

) which can track the decomposition products of fluorocarbons. The pyrolysis heating rate/decomposition temperature/decomposition product content conditions are associated systematically with the characteristic decomposition products / insulating material erosion determined by experiments

and the chemical reaction history of the formed hexafluoroethane (HFE) and perfluoropropane due to thermal decomposition of SF

-PTFE in the temperature range of 500-600 ℃ is clarified. The results can be directly applied to the qualitative and quantitative detection of thermal erosion of PTFE nozzle of circuit breaker and can provide an experimental and theoretical basis for accurate analysis of failure of nozzle.

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Related Institution

State Grid Shaanxi Electric Power Research Institute

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⁰

Study on Pyrolysis of Polytetrafluoroethylene in SF6

DOI：10.13296/j.1001-1609.hva.2024.05.024

摘要

Abstract

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Study on Pyrolysis of Polytetrafluoroethylene in SF₆