Thermal equilibrium composition of C4F7N/CO2 gas mixtures during arc-interruption

被引：0
|
作者：
Gao, Wenqiang [1 ]
Shiravand, Vahid [1 ]
Posada, Luisa F. [2 ]
Shubhashish, Shubhashish [2 ]
Suib, Steven L. [2 ]
Cao, Yang [1 ]
机构：
[1] Univ Connecticut, Dept Elect & Comp Engn, Storrs, CT 06269 USA
[2] Univ Connecticut, Dept Chem, Storrs, CT 06269 USA
来源：
2023 IEEE CONFERENCE ON ELECTRICAL INSULATION AND DIELECTRIC PHENOMENA, CEIDP | 2023年
基金：
美国能源部;
关键词：
C4F7N; SF6; replacement; decomposition; thermal equilibrium; Gibbs free energy;
D O I：
暂无
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
C4F7N/CO2 gas mixtures have been proposed as an eco-friendly insulator with a low global warming potential to replace SF6 in the power grid. However, recent studies revealed that these gas mixtures may decompose in complicated pathways, raising concerns about their scaling-up adoption. In this work, we performed computations aimed at probing the thermal equilibrium composition of C4F7N/CO2 gas mixtures during arc-interruption based on density functional theory (DFT) and Gibbs free energy minimization. The computations demonstrated that C4F7N stays stable until 1000 K. Above 1000 K, C4F7N rapidly decomposes into CF3, CN, and F free radicals, and the C free radicals released from C4F7N recombine with the O free radicals released from CO2 to generate CO. Above 10000 K, CO starts to decompose into C free radicals and O free radicals. Above 20000 K, all molecules and free radicals fully decompose into monatomic free radicals, including C, F, N, and O. The computations aid the future mitigation of C4F7N/CO2 decomposition products and promote the adoption of C4F7N/CO2 gas mixtures in an SF6-free green power network.
引用
收藏
页数：3
相关论文
共 50 条
  • [31] The Conduction Current Characteristics of C4F7N/CO2 Gas Mixture With Different Influencing Factors
    Tang, Deyue
    Zhang, Lei
    Yu, Di
    Zhang, Zhousheng
    IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION, 2024, 31 (05) : 2416 - 2424
  • [32] Influence of Conductor Surface Roughness on Insulation Performance of C4F7N/CO2 Mixed Gas
    Zheng, Yu
    Zhou, Wenjun
    Li, Han
    Yan, Xianglian
    Li, Zhibing
    Chen, Weijiang
    Bian, Kai
    IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION, 2019, 26 (03) : 922 - 929
  • [33] Study of Compatibility Between Epoxy Resin and C4F7N/CO2 Based on Thermal Ageing
    Yuan, Ruijun
    Li, Han
    Zhou, Wenjun
    Zheng, Zheyu
    Yu, Jianhui
    IEEE ACCESS, 2020, 8 : 119544 - 119553
  • [34] Decomposition characteristics and influencing mechanisms of C4F7N/CO2 gas with different metal materials
    Yang, Yuan
    Gao, Keli
    Wang, Hao
    Yuan, Shuai
    Du, Jinchao
    Ji, Yansong
    Fu, Dehui
    Huang, Yin
    Cui, Guangkai
    AIP ADVANCES, 2024, 14 (09)
  • [35] Insulation properties of C4F7N/CO2 mixtures under non-uniform electric field
    Zhang, Tianran
    Zhou, Wenjun
    Zheng, Yu
    Yu, Jianhui
    IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION, 2019, 26 (06) : 1747 - 1754
  • [36] Ultraviolet Spectral Analysis and Quantitative Detection of Heptafluoroisobutyronitrile (C4F7N) in a C4F7N-Carbon Dioxide (CO2) Gas Mixture
    Zhang, Yin
    Zhang, Xiaoxing
    Liu, Chang
    Li, Yi
    Cui, Zhaolun
    Fu, Mingli
    APPLIED SPECTROSCOPY, 2019, 73 (08) : 917 - 926
  • [37] Breakdown Characteristics of C4F7N/CO2 Mixtures Under Steep-Wavefront Impulse Voltages
    Zhou, Wenjun
    Zhang, Tianran
    Wang, Lingzhi
    IEEE ACCESS, 2020, 8 : 29291 - 29298
  • [38] Comparison of machine learning algorithms based on machine learning for the prediction of thermal plasma physical parameters of C4F7N and CO2 environmentally friendly gas mixtures
    Ding, Can
    Tian, Haobo
    Yu, Donghai
    AIP ADVANCES, 2024, 14 (03)
  • [39] Surface Flashover Characteristics of the 252kV Conical Insulator in C4F7N/CO2 Gas Mixtures under AC Voltage
    Li Z.
    Zheng Z.
    Liu Y.
    Ding W.
    Li X.
    Diangong Jishu Xuebao/Transactions of China Electrotechnical Society, 2020, 35 (01): : 62 - 69
  • [40] Detection of C4F7N/CO2 Gas Mixture Decomposition Products Based on Photonic Crystal Fiber
    Zheng, Diya
    Wang, Yuan
    Liao, Wenlin
    Ma, Guoming
    2020 IEEE ELECTRICAL INSULATION CONFERENCE (EIC), 2020, : 136 - 139
12345