Research Progress and Challenges of Fluorocarbon-Based Eco-Friendly Insulating Gases in Power Transmission and Distribution Equipment
Chen Yijiang1, Li Yi1, Xiao Song1, Zhuo Ran2, Fan Xinhong3, Fu Mingli2, Zhang Xiaoxing4, Tang Ju1
1. School of Electrical Engineering and Automation Wuhan University Wuhan 430072 China; 2. CSG Electric Power Research Institute Guangzhou 510663 China; 3. Electric Power Research Institute of State Grid Gansu Electric Power Company Lanzhou 730070 China; 4. School of Electrical and Electronic Engineering Hubei University of Technology Wuhan 430068 China
Abstract：This systematic review examines the decomposition byproducts, material compatibility challenges, leakage risks, and corresponding maintenance technologies associated with fluorocarbon-based eco-friendly insulating gases when used as SF6 alternative gases in gas-insulated equipment (GIE). The research aims to address key engineering challenges and propose performance optimization strategies for practical applications. Fluorocarbon-based eco-friendly insulating gases are designed due to their low global warming potential (GWP) and high insulation strength, and they are applied in 12~252 kV switchgear, circuit breakers, and combined electrical equipment. Nevertheless, under fault conditions such as partial discharge, electric arcs, or overheating, these compounds undergo intricate decomposition reactions, resulting in the generation of highly toxic and corrosive gases as well as solid carbon/fluorides. This process diminishes insulation performance and expedites material degradation. Moreover, when exposed to temperatures surpassing 220℃, their inferior compatibility with metals (e.g., copper) and non - metallic sealing materials (e.g., EPDM rubber) gives rise to electrode corrosion and seal failures, notably augmenting leakage risks. Existing research findings suggest that material modification and system optimization represent crucial avenues for enhancing the stability of environmental gas insulation equipment. The incorporation of O2 can quench free radicals and disrupt chain reactions, effectively suppressing up to 40% of the decomposition products derived from fluorocarbon gases. Nevertheless, it is essential to take precautions to prevent oxidation corrosion induced by high concentrations of O2. Nanomaterial - based sensors (for instance, Pd-MoS2, which is capable of detecting C4F7N leaks at a level of 0.25×10-4%; and Cu-doped materials that exhibit specific responses to C2N2) facilitate real - time monitoring. Traditional adsorbents (such as γ-Al2O3) have been supplanted by novel MOFs composites (e.g., HKUST-1@nanofiber membrane). The multi-level pore structures of these composites significantly augment the adsorption capacity for decomposition products. Material modification techniques (including electrode surface grain boundary restructuring and rubber fluorination) can reduce solid deposits by 60% and simultaneously prolong the service life of seals. Future research on fluorocarbon-based eco-friendly insulating gases ought to concentrate on constructing a three-tier collaborative framework of “molecule-material-system”. At the molecular level, it is necessary to enhance the studies of free radical reaction kinetics and formulate decomposition product prediction models under arc/thermal coupled fields to direct the development of low-toxicity gas formulations. In terms of materials, passivation technologies (such as self-healing electrode coatings) and smart-responsive materials should be expanded to surmount compatibility limitations. From a systemic perspective, integrating nanosensing arrays with MOFs adsorption modules will establish a closed - loop system of “monitoring-purification-early warning”. This aligns with the requirements of the dual-carbon policy by setting decomposition product threshold standards and full-lifecycle carbon footprint assessment protocols. Through the in-depth integration of industry, academia, and research, the objective is to form a comprehensive innovation ecosystem encompassing gas design, equipment adaptation, and standard formulation, which supports the green transformation of power equipment and the implementation of the national carbon neutrality strategy.
陈钇江, 李祎, 肖淞, 卓然, 樊新鸿, 傅明利, 张晓星, 唐炬. 氟碳类环保绝缘气体在输配电设备中的研究进展与挑战[J]. 电工技术学报, 2026, 41(15): 5265-5284.
Chen Yijiang, Li Yi, Xiao Song, Zhuo Ran, Fan Xinhong, Fu Mingli, Zhang Xiaoxing, Tang Ju. Research Progress and Challenges of Fluorocarbon-Based Eco-Friendly Insulating Gases in Power Transmission and Distribution Equipment. Transactions of China Electrotechnical Society, 2026, 41(15): 5265-5284.
[1] 程显, 刘赛, 葛国伟, 等. ±400 kV直流穿墙套管用环保气体的绝缘特性[J]. 电工技术学报, 2025, 40(3): 900-912. Cheng Xian, Liu Sai, Ge Guowei, et al.Insulation characterization of environmentally friendly gases for ±400 kV DC wall bushing[J]. Transactions of China Electrotechnical Society, 2025, 40(3): 900-912. [2] 周文俊, 邱睿, 郑宇, 等. 环保绝缘气体介电强度预测方法评估[J]. 电工技术学报, 2023, 38(增刊1): 214-221. Zhou Wenjun, Qiu Rui, Zheng Yu, et al.The evaluation of dielectric strength prediction methods for eco-friendly insulation gases[J]. Transactions of China Electrotechnical Society, 2023, 38(S1): 214-221. [3] 张晓星, 田双双, 肖淞, 等. SF6替代气体研究现状综述[J]. 电工技术学报, 2018, 33(12): 2883-2893. Zhang Xiaoxing, Tian Shuangshuang, Xiao Song, et al.A review study of SF6 substitute gases[J]. Transactions of China Electrotechnical Society, 2018, 33(12): 2883-2893. [4] 李祎, 张晓星, 傅明利, 等. 环保绝缘气体C4F7N研究及应用进展Ⅰ: 绝缘及电、热分解特性[J]. 电工技术学报, 2021, 36(17): 3535-3552. Li Yi, Zhang Xiaoxing, Fu Mingli, et al.Research and application progress of eco-friendly gas insulating medium C4F7N, part Ⅰ: insulation and electrical, thermal decomposition properties[J]. Transactions of China Electrotechnical Society, 2021, 36(17): 3535-3552. [5] Bahdad F O, Chen Lujia, Han Qinghua.Modeling of DC breakdown characteristic in coaxial geometries for SF6 and its alternatives[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2024, 31(3): 1438-1446. [6] 高克利, 杨圆, 周文俊, 等. SF6替代型环保绝缘气体: 研究、应用和展望[J]. 中国电机工程学报, 2024, 44(18): 7395-7411. Gao Keli, Yang Yuan, Zhou Wenjun, et al.SF6 alternative environmentally friendly insulating gas: research, application and outlook[J]. Proceedings of the CSEE, 2024, 44(18): 7395-7411. [7] Gao Wenqiang, Posada L, Shiravand V, et al.Decomposition characteristics of C4F7N-based SF6-alternative gas mixtures[J]. Journal of Applied Physics, 2024, 135(6): 063302. [8] Ohtsuka S, Matsuoka T, Shintake M, et al.Influence of mixing ratio change of SF6 alternative gas mixtures considering synergy effect of critical electric field strength[C]//2022 9th International Conference on Condition Monitoring and Diagnosis (CMD), Kitakyushu, Japan, 2023: 202-206. [9] Goo S G, Lee J H.Characteristics of SF6 alternative gas for GIS application in KEPCO[C]//2022 6th International Conference on Electric Power Equipment-Switching Technology (ICEPE-ST), Seoul, Republic of Korea, 2022: 282-285. [10] Xiao Ang, Owens J.Prediction of temperature performance for SF6 alternative gas mixtures[C]//2020 IEEE/PES Transmission and Distribution Conference and Exposition (T&D), Chicago, IL, USA, 2021: 1-5. [11] Li Yi, Zhang Xiaoxing, Zhang Ji, et al.Assessment on the toxicity and application risk of C4F7N: a new SF6 alternative gas[J]. Journal of Hazardous Materials, 2019, 368: 653-660. [12] Loizou L, Chen L, Liu Q.Breakdown characteristics of C3F7CN/CO2 gas mixtures in rod-plane gaps[C]//2018 IEEE International Conference on High Voltage Engineering and Application (ICHVE), Athens, Greece, 2019: 1-4. [13] Li Xingwen, Zhao Hu, Murphy A B.SF6-alternative gases for application in gas-insulated switchgear[J]. Journal of Physics D: Applied Physics, 2018, 51(15): 153001. [14] Stadlbauer T, Kramer T, Kontelis D, et al.SF6 gas replacement in pulsed high voltage coaxial cables[C]//2019 IEEE 20th International Conference on Dielectric Liquids (ICDL), Roma, Italy, 2019: 1-5. [15] 林林, 陈庆国, 程嵩, 等. 基于密度泛函理论的SF6潜在可替代性气体介电性能分析[J]. 电工技术学报, 2018, 33(18): 4382-4388. Lin Lin, Chen Qingguo, Cheng Song, et al.The analysis of SF6 potential alternative gas dielectric strength based on density functional theory[J]. Transactions of China Electrotechnical Society, 2018, 33(18): 4382-4388. [16] Sun Dongwei, Pang Yanze, Tang Nian, et al.Experiment on the thermal stability of perfluoro-methyl-vinyl-ether: potential SF6 alternative in insulation applications[C]//2024 7th International Conference on Electric Power Equipment - Switching Technology (ICEPE-ST), Xiamen, China, 2024: 456-460. [17] Liu Zhuhan, Feng Yi, Jiang Ningyuan, et al.Arc erosion behavior of Cu/Ti3SiC2 cathodes in c-C4F8 gas as a substitute for SF6 gas[J]. Journal of Electronic Materials, 2023, 52(11): 7818-7832. [18] Omori T, Shimizu D, Matsumoto T, et al.Electron swarm parameters in gas mixtures of CF3I, SF6, CO2 with N2 at atmospheric pressure[C]//2014 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP), Des Moines, IA, USA, 2014: 130-133. [19] González-Magaña O, Colorado N R, Basurto E, et al.Electron swarm coefficients and critical field strength of the gaseous ternary mixtures CF3I-SF6-N2 and CF3I-SF6-CO2[J]. Journal of Physics D: Applied Physics, 2020, 53(18): 185203. [20] Dujko S, Atić J, Bošnjaković D, et al.Electron transport coefficients and negative streamer dynamics in CF3I-SF6 mixtures[C]//2019 IEEE 20th Inter-national Conference on Dielectric Liquids (ICDL), Roma, Italy, 2019: 1-4. [21] Jia Zongkai, Chen Qingguo, Lin Lin, et al.Study of partial discharge characteristics in HFO-1234ze(E)/N2 mixtures[J]. Plasma Science and Technology, 2020, 22(11): 115403. [22] Zhang Boya, Deng Junwei, Wang S, et al.Thermodynamic, transport, and radiation properties of HFO-1336mzz(E) mixtures as eco-friendly SF6 alternatives[J]. Journal of Physics D: Applied Physics, 2023, 56(43): 435502. [23] Wang Feng, Hu Dexiong, Zhong Lipeng, et al.Surface flashover characteristics of epoxy resin in HFO-1336mzz(E)/CO2 gas mixtures under negative DC voltage[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2023, 30(5): 2067-2074. [24] Bilbao E, Xia Xinyi, Alonso M L, et al.Stability valorization of hydrofluoroolefine HFO-1336mzzE and its mixtures under arc discharge conditions[J]. Industrial & Engineering Chemistry Research, 2024, 63(7): 2916-2931. [25] Zhang Boya, Wang Kai, Yao Yuyang, et al.Insulation characteristics of HFO-1336mzz(E) and its mixtures as eco-friendly alternatives to SF6 for medium-voltage switchgears[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2023, 30(2): 536-545. [26] Stoller P C, Doiron C B, Tehlar D, et al.Mixtures of CO2 and C5F10O perfluoroketone for high voltage applications[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2017, 24(5): 2712-2721. [27] Zhang Runlong, Zhang Xiaohui, Xu Zhilei, et al.Study on the insulation performance of C5F10O gas mixture in cold climates[J]. AIP Advances, 2025, 15: 015304. [28] Cui Zhaoxuan, Lin Xin, Li Xiaolong, et al.Temperature rise characteristics of C5F10O/CO2 gas mixture AC high voltage switch bus[J]. High Voltage, 2025, 10(2): 325-336. [29] Zhang Boya, Wang S, Chen Li, et al.Influence of oxygen on solid carbon formation during arcing of eco-friendly SF6-alternative gases[J]. Journal of Physics D: Applied Physics, 2023, 56(36): 365502. [30] Luo Wenxuan, Wang Jiahao, Wu Yingyu, et al.Relevance analysis between decomposition product characteristics of C6F12O gas mixture under partial discharge and insulation faults[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2024, 31(6): 3067-3073. [31] Man Chenxi, Wang Jincong, Gao Keli, et al.Detection of transient decomposition products of CF3SO2F and C4F7N via OES under spark and glow discharges[J]. High Voltage, 2025, 10(6): 1582-1592. [32] 柯学, 王安阳, 刘伟, 等. CF3SO2F及其混合气体电弧等离子体粒子组分与物性参数计算[J]. 电工技术学报, 2024, 39(19): 6145-6161. Ke Xue, Wang Anyang, Liu Wei, et al.Calculation of particle composition and physical property parameters of arc plasma particles of CF3SO2F and its gas mixtures[J]. Transactions of China Electrotechnical Society, 2024, 39(19): 6145-6161. [33] Hu Shizhuo, Wang Yi, Zhou Wenjun, et al.Dielectric properties of CF3SO2F/N2 and CF3SO2F/CO2 mixtures as a substitute to SF6[J]. Industrial & Engineering Chemistry Research, 2020, 59(35): 15796-15804. [34] Li Yi, Pang Zhiyi, Zheng Hanbo, et al.Electrical properties of CF3SO2F insulating gas based on density functional theory[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2024, 31(1): 297-303. [35] Wang Yachao, Lin Xiaoran, Wang Mei, et al.Properties of CF3SO2F under the influence of external electric field: a DFT study[J]. Results in Physics, 2023, 45: 106248. [36] 张博雅, 唐念, 孙东伟, 等. 新型SF6替代气体全氟甲基乙烯基醚的绝缘性能研究[J]. 高压电器, 2025, 61(2): 165-170. Zhang Boya, Tang Nian, Sun Dongwei, et al.Research on insulation performance of a new CF3OCF=CF2 alternative gas to SF6[J]. High Voltage Apparatus, 2025, 61(2): 165-170. [37] Sinha N, Song M Y, Chang H, et al.Electron impact cross sections and transport studies of C3F6O[J]. Applied Sciences, 2023, 13(23): 12612. [38] Xiao Song, Chen Yijiang, Tang Mingjun, et al.Characteristics of perfluoromethyl vinyl ether: a new eco-friendly alternative gas for SF6[J]. High Voltage, 2024, 9(3): 509-517. [39] Sinha N, Choi H, Song M Y, et al.Perfluoro-methyl-vinyl-ether as SF6 alternative in insulation applications: a DFT study on the physiochemical properties and decomposition pathways[J]. Computational and Theoretical Chemistry, 2023, 1225: 114159. [40] Peng Gang, Rao Xiajin, Li Dajian, et al.Theoretical study on the compatibility of C4F7N decomposition products with metal oxides: first-principles[J]. Journal of Fluorine Chemistry, 2025, 283: 110417. [41] Wang Wen, Yan Xianglian, Wang Hao, et al.Comparative studies of C4F7N-based gas mixtures as the eco-friendly alternative to SF6 for interrupting applications[J]. High Voltage, 2025, 10(1): 228-242. [42] Wu Yuewei, Wu Jian, Wei Xiaolong, et al.Theoretical investigation of C4F7N-CO2 mixture decomposition characteristics under extreme conditions[J]. Energies, 2025, 18(3): 591. [43] 赵启, 刘绍勇, 罗金文, 等. C4F7N/CO2/O2混合气体近区故障开断性能研究[J]. 高压电器, 2024, 60(9): 85-91. Zhao Qi, Liu Shaoyong, Luo Jinwen, et al.Study on short line fault interruption performance of a circuit breaker with C4F7N/CO2/O2 gas mixture[J]. High Voltage Apparatus, 2024, 60(9): 85-91. [44] 段竣然, 颜湘莲, 高克利, 等. C4F7N/CO2及其分解气体与环氧树脂的相容特性分析[J]. 电工技术学报, 2025, 40(3): 890-899. Duan Junran, Yan Xianglian, Gao Keli, et al.Compatibility analysis of C4F7N/CO2 and its gas byproducts with epoxy resin[J]. Transactions of China Electrotechnical Society, 2025, 40(3): 890-899. [45] 唐炬, 唐博文, 陈钇江, 等. 环保气体C4F7N绝缘设备内有害分解产物吸附材料研究进展[J]. 高电压技术, 2025, 51(8): 3876-3887. Tang Ju, Tang Bowen, Chen Yijiang, et al.Research progress on adsorbent materials for harmful by-products in environmental gas C4F7N insulated equipment[J]. High Voltage Engineering, 2025, 51(8): 3876-3887. [46] Preve C, Perez Quesada J C, Godechot X. Groundbreaking SF6 free solutions based on vacuum technologies[C]//2024 7th International Conference on Electric Power Equipment-Switching Technology (ICEPE-ST), Xiamen, China, 2024: 78-82. [47] Franck C M, Chachereau A, Pachin J.SF6-free gas-insulated switchgear: current status and future trends[J]. IEEE Electrical Insulation Magazine, 2021, 37(1): 7-16. [48] Liu Sijie, Li Xiaolong, Wang Wen, et al.The decomposition pathways of C4F7N/CO2 mixtures in the presence of organic insulator vapors[J]. IEEE Access, 2025, 13: 9335-9342. [49] Zeng Fuping, Guo Xinnuo, Chen Xiaoyue, et al.Mixed-terminal MXenes react with SF6 in aqueous solution: reaction mechanism and pathway[J]. Journal of Physics D: Applied Physics, 2024, 57(1): 015501. [50] Wu Dongyue, Ding Weizhan, Li Ji, et al.Sensing properties of SF6 decomposition gas sensor based on Ru modified α-AsP: a DFT study[J]. Solid State Communications, 2025, 403: 116017. [51] Zhao Danchen, Yan Jing, He Ruixin, et al.Decomposition mechanism of C4F7N/CO2 gas mixture based on molecular dynamics and effect of O2 content[J]. Journal of Applied Physics, 2024, 135(2): 024401. [52] Xiao Song, Chen Yijiang, Li Yi, et al.Assessment on the application feasibility of C4F7N/CO2 for eco-friendly gas insulated transformer[J]. IEEE Transac-tions on Dielectrics and Electrical Insulation, 2023, 30(2): 795-801. [53] Fu Yuwei, Chen Chi, Wang Chuang, et al.The variation of C4F7N, C5F10O, and their decomposition components in breakdown under different pressures[J]. AIP Advances, 2021, 11(6): 065010. [54] Zhang Boya, Hao Mai, Xiong Jiayu, et al.Ab initio molecular dynamics calculations on electron ionization induced fragmentations of C4F7N and C5F10O for understanding their decompositions under discharge conditions[J]. Physical Chemistry Chemical Physics, 2023, 25(10): 7540-7549. [55] Liu Sijie, Li Xiaolong, Geng Zhenxin, et al.The decomposition pathways of C4F7N/CO2/O2 mixtures in the PTFE vapors[J]. AIP Advances, 2024, 14(12): 125315. [56] Gao Qingqing, Xiao Yafan, Wang Xiaohua, et al.The calculation of the decomposition products of C5F10O-CO2 mixtures with a chemical kinetic model[J]. Physica Scripta, 2023, 98(6): 065601. [57] Wang Xiaonan, Yuan Huan, Yang Aijun, et al.Decomposition products and mechanism of C5F10O/N2 gas mixture by electron attachment mass spectrometry[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2022, 29(3): 1127-1134. [58] Gao Qingqing, Wang Xiaohua, Guan Huai, et al.Decomposition product formation mechanism of C5F10O-CO2 mixture in corona discharge by a chemical kinetic model[J]. Plasma Sources Science and Technology, 2025, 34(1): 015005. [59] Tian Shuangshuang, Liu Weihao, Liu Benli, et al.Mechanistic study of C5F10O-induced lung toxicity in rats: an eco-friendly insulating gas alternative to SF6[J]. Science of the Total Environment, 2024, 916: 170271. [60] Gao Qingqing, Wang Xiaohua, Sun Haofei, et al.Calculation of the decomposition products of C5F10O-air mixtures from 500K to 3500K with a chemical kinetic model[J]. Plasma Chemistry and Plasma Processing, 2024, 44(5): 1883-1903. [61] Li Yi, Zhang Xiaoxing, Zhang Ji, et al.Study on the thermal decomposition characteristics of C4F7N-CO2 mixture as eco-friendly gas-insulating medium[J]. High Voltage, 2020, 5(1): 46-52. [62] Zhao Mingyue, Han Dong, Zhao Weikang, et al.Experimental and theoretical studies of C3F7CN/CO2 mixture decomposition under overheating fault[J]. CSEE Journal of Power and Energy Systems, 2022, 8(3): 941-951. [63] Zhang Xiaoxing, Zhang Yin, Huang Yi, et al.Detection of decomposition products of C4F7N-CO2 gas mixture based on infrared spectroscopy[J]. Vibrational Spectroscopy, 2020, 110: 103114. [64] Zheng Diya, Wang Yuan, Liao Wenlin, et al.Detection of C4F7N/CO2 gas mixture decomposition products based on photonic crystal fiber[C]//2020 IEEE Electrical Insulation Conference (EIC), Knoxville, TN, USA, 2020: 136-139. [65] Li Yi, Zhang Xiaoxing, Zhang Ji, et al.Thermal decomposition properties of fluoronitriles-N2 gas mixture as alternative gas for SF6[J]. Journal of Fluorine Chemistry, 2020, 229: 109434. [66] Xia Yalong, Liu Fan, Li Yalong, et al.Study on the thermal decomposition characteristics of C5F10O/N2 gas mixture[C]//2020 IEEE 4th Conference on Energy Internet and Energy System Integration (EI2), Wuhan, China, 2021: 3641-3644. [67] She Congdong, Zeng Fuping, Dai Liangjun, et al.Self-recovery pathways of C5F10O after over thermal decomposition[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2022, 29(4): 1450-1458. [68] Fu Yuwei, Yang Lei, Li Xingdi, et al.Theoretical study of the decomposition mechanism of C5F10O in the presence of Cu vapor[J]. AIP Advances, 2020, 10(11): 115010. [69] Hou Jun, Li Bin, Zheng Yibin, et al.Molecular dynamics simulation of superheated decomposition of environmental friendly C5F10O mixture gas[C]//2022 4th International Conference on Smart Power & Internet Energy Systems (SPIES), Beijing, China, 2023: 443-448. [70] Wang Xiaonan, Wang Xiaohua, Yuan Huan, et al.Study on the insulation performance and decomposition characteristics of C5F10O/CO2 gas mixture[J]. Plasma Chemistry and Plasma Processing, 2022, 42(4): 957-971. [71] Zhuo Ran, Fu Mingli, Wang Dibo, et al.Generation characteristics of solid byproducts of the C4F7N-CO2-O2 gas mixture under PD fault[J]. ACS Omega, 2023, 8(26): 23457-23464. [72] Zhang Xiaoxing, Wang Yufei, Li Yi, et al.Thermal compatibility properties of C6F12O-air gas mixture with metal materials[J]. AIP Advances, 2019, 9(12): 125024. [73] Li Yi, Zhang Xiaoxing, Zhang Ji, et al.Thermal compatibility between perfluoroisobutyronitrile-CO2 gas mixture with copper and aluminum switchgear[J]. IEEE Access, 2019, 7: 19792-19800. [74] Li Yi, Zhang Xiaoxing, Chen Qi, et al.Study on the thermal interaction mechanism between C4F7N-N2 and copper, aluminum[J]. Corrosion Science, 2019, 153: 32-46. [75] Gao Wenqiang, Cao Yang, Wang Yifei, et al.Materials compatibility study of C4F7N/CO2 gas mixture for medium-voltage switchgear[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2022, 29(1): 270-278. [76] Kessler F, Sarfert-Gast W, Kuhlmann L, et al.Compatibility of a gaseous dielectric with Al, Ag, and Cu and gas-phase synthesis of a new N-acylamidine copper complex[J]. European Journal of Inorganic Chemistry, 2020, 2020(20): 1989-1994. [77] Zhang Xiaoxing, Wu Peng, Cheng Lin, et al.Compatibility and interaction mechanism between EPDM rubber and a SF6 alternative gas-C4F7N/CO2/O2[J]. ACS Omega, 2021, 6(20): 13293-13299. [78] Liu Wei, Zheng Yu, Zhang Wenliang, et al.Experimental study of compatibility between the eco-friendly insulation mixed gas CF3SO2F/N2 and EPDM and CR materials[J]. ACS Omega, 2024, 9(7): 7958-7966. [79] Zhuo Ran, Chen Junyi, Xiao Song, et al.Compatibility and interaction mechanism between the C4F7N/CO2/O2 gas mixture and FKM and NBR[J]. ACS Omega, 2023, 8(12): 11414-11424. [80] Gao Wenqiang, Posada L F, Shiravand V, et al.High-throughput compatibility screening of materials for SF6-alternative insulation[J]. Environmental Science & Technology, 2024, 58(30): 13296-13306. [81] Li Yi, Zhang Xiaoxing, Li Yalong, et al.Interaction mechanism between the C4F7N-CO2 gas mixture and the EPDM seal ring[J]. ACS Omega, 2020, 5(11): 5911-5920. [82] Wang Guanyu, Zhang Boya, Cao Minchuan, et al.Two-temperature thermodynamic and transport properties of C4F7N-CO2-O2 mixture as an arc-extinguishing gas[J]. Journal of Physics D: Applied Physics, 2025, 58(16): 165502. [83] Ye Fanchao, Chu Yitian, Brault P, et al.Mechanism of O2 influence on the decomposition process of the eco-friendly gas insulating medium C4F7N/CO2[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2024, 31(5): 2407-2415. [84] Sun Dongwei, Wang Feng, Liang Kaibin, et al.Investigating the influence of O2 on surface flashover characteristics and gas-solid interface compatibility in C4F7N/CO2 mixtures under negative DC voltage[J]. IEEE Access, 2025, 13: 46161-46170. [85] Zhuo Ran, Liu Jing, Fu Mingli, et al.Effect of oxygen on the thermal decomposition of eco-friendly gas insulating medium C4F7N-CO2[C]//2020 IEEE International Conference on High Voltage Engineering and Application (ICHVE), Beijing, China, 2020: 1-4. [86] Ye Fanchao, Zhang Xiaoxing, Li Yi, et al.Effect of O2 on AC partial discharge and decomposition behavior of C4F7N/CO2/O2 gas mixture[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2021, 28(4): 1440-1448. [87] Li Yi, Zhang Xiaoxing, Ye Fanchao, et al.Influence regularity of O2 on dielectric and decomposition properties of C4F7N-CO2-O2 gas mixture for medium-voltage equipment[J]. High Voltage, 2020, 5(3): 256-263. [88] Lu Xianglin, Yan Jing, Chen Pu, et al.Breakdown characteristics of C4F7N/CO2/O2 gas mixtures with low content of C4F7N[C]//2025 IEEE International Conference on Electrical Energy Conversion Systems and Control (IEECSC), Chongqing, China, 2025: 962-966. [89] 电力网. 国内首台(套)110千伏C4环保气体GIS设备在上海投运[EB/OL]. (2022-12-07)[2025-09-15]. http://www.chinapower.com.cn/dww/sbdt/20221207/178540.html. [90] Cui Guangkai, Wang Cong, Yang Yuan, et al.Discharge fault type identification of C4F7N/CO2/O2 mixed insulating gas for engineering based on product components[J]. Journal of Physics D: Applied Physics, 2024, 57(47): 475503. [91] HITACH. EconiQ® gas-insulated switchgear (GIS) ELK-04, 145 kV[EB/OL]. (2025-09-01)[2025-09-15]. https://www.hitachienergy.com/products-and-solutions/high-voltage-switchgear-and-breakers/gas-insulated-switchgear/gis-for-72-5-1200-kv/econiq-gis-elk-04- 145-kv. [92] Xiao Song, Xia Haoran, Li Zhanyuan, et al.Enhancing corrosion resistance of copper for C4F7N based eco-friendly gas-insulated equipment[J]. High Voltage, 2025, 10(5): 1125-1134. [93] Chen Dachang, Zheng Ziang, Zhang Cong, et al.Adsorption and sensing characteristics of insulating gas C4F7N on 3d late transition metal-phthalocyanine: theoretical and experimental study[J]. High Voltage, 2024, 9(4): 870-878. [94] Xiao Song, Xue Yuhang, Li Zhanyuan, et al.High-performance Co3O4 nanoparticle-based gas sensor for leakage detection of eco-friendly insulating gas C4F7N[J]. ACS Sensors, 2025, 10(4): 2976-2985. [95] Cao Jianjun, Wang Mingxiang, Zhang Yiyi, et al.Gas sensitivity evaluation of decomposition gases in environmentally friendly insulating devices (C4F7N/CO2) (Chromium cluster-modified BNNTs surface interface at the atomic scale)[J]. Surfaces and Interfaces, 2024, 54: 105202. [96] Yan Yongxu, Luo Yi, Li Yi, et al.Transition metal (Au, Ag, Pt, Pd, Ni) doped MoS2 as gas sensing materials for C4F7N leakage detection: a comparative study[J]. Surfaces and Interfaces, 2024, 44: 103625. [97] Wu Peng, Li Yi, Xiao Song, et al.SnO2 nanoparticles based highly sensitive gas sensor for detection of C4F7N: a new eco-friendly gas insulating medium[J]. Journal of Hazardous Materials, 2022, 422: 126882. [98] Zhou Zhengwei, Sun Jiaqi, Pan Xuanying, et al.Pt3 cluster doped SnS2 monolayer as a gas-sensing material to C4F7N decomposition: a DFT study[J]. Computational and Theoretical Chemistry, 2024, 1238: 114714. [99] Xiong Yonggang, Yao Tao, Xie Fang.Adsorption of eco-friendly insulating gas C4F7N on PdSe2 monolayer surface: a first-principles study[J]. Computational and Theoretical Chemistry, 2024, 1241: 114905. [100] Albadr R J, Taher W M, Roopashree R, et al.Engineering the surface of WS2 nanosheets by Con clusters to improve the adsorption of C4F7N decomposition gas molecules: a DFT study[J]. Surface Science, 2025, 757: 122722. [101] Li Changyun, Chen Peigang, Yu Yongjin, et al.Cuγ (γ= 1-3)-modified MoS2 monolayer as a gas sensor for detecting C4F7N and its decomposition components[J]. Nanomaterials, 2022, 12(16): 2829. [102] Liu Wei, Qiu Xinjie, Song Yumei, et al.Adsorption behaviour of CF4 and COF2 gas on the GaN monolayer doped with Pt catalytic: a first-principles study[J]. Surface Science, 2022, 719: 122032. [103] Wu Peng, Li Yi, Luo Yan, et al.2D MOF-based filtration-sensing strategy for trace gas sensing under intense F-gas interference at room temperature[J]. Advanced Functional Materials, 2025, 35(20): 2415517. [104] 侯华, 颜湘莲, 余小娟, 等. 分子筛吸附C4F7N/CO2混合绝缘气体及其分解产物的理论研究[J]. 高电压技术, 2019, 45(4): 1040-1047. Hou Hua, Yan Xianglian, Yu Xiaojuan, et al.Theoretical investigation on the adsorption of C4F7N/CO2 dielectric gas and decomposition products in zeolite[J]. High Voltage Engineering, 2019, 45(4): 1040-1047. [105] 肖焓艳, 李洪涛, 丁然, 等. 分子筛物理结构和化学改性对C4F7N及其分解产物吸附特性的影响[J]. 绝缘材料, 2024, 57(9): 26-36. Xiao Hanyan, Li Hongtao, Ding Ran, et al.Effect of physical structure and chemical modification of molecular sieves on adsorption properties of C4F7N and its decomposition products[J]. Insulating Materials, 2024, 57(9): 26-36. [106] 杨景刚, 丁然, 赵科, 等. 13X分子筛对C4F7N混合气体碳氟分解产物吸附性能研究[J]. 高压电器, 2024, 60(9): 20-26. Yang Jinggang, Ding Ran, Zhao Ke, et al.Adsorption performance of 13X molecular sieve on carbon fluorine decomposition products of C4F7N mixed gas[J]. High Voltage Apparatus, 2024, 60(9): 20-26. [107] Xu Zhiping, Zhang Yifang, Guo Longxin, et al.Scalable synthesis of hierarchical porous MOF-199 decorated aminated wood sponge as physisorbent materials for carbon dioxide capture from wet flue gas[J]. Journal of Environmental Chemical Engineering, 2025, 13(4): 117128. [108] Zhang Ying, Chen Shuhui, Wu Yue, et al.Enhanced adsorption selectivity of ultra-microporous porphyrin-based MOFs for F-gases via induced polarization effect[J]. Separation and Purification Technology, 2025, 374: 133716. [109] Medel E, Vargas R.Non-covalent interactions in MOFs: a quantum approach to gas adsorption and molecular encapsulation[J]. Frontiers in Chemistry, 2025, 13: 1579977. [110] Wang Xinyu, Seyedpour S F, Hrapovic S, et al.Ultra-small defect-engineered UiO-66 on cellulose nanocrystal template for advanced carbon dioxide capture membrane[J]. Cleaner Engineering and Technology, 2025, 27: 100999. [111] Gao Shuo, Feng Wanru, Jin Junsu, et al.Triazole-functionalized Ni-MOF-74 for high-performance CO2 capture: Balancing capacity, selectivity, and humidity tolerance[J]. Chemical Engineering Journal, 2025, 515: 163549. [112] Barnes A L, Bykov D, Lyakh D I, et al.Multilayer divide-expand-consolidate coupled-cluster method: demonstrative calculations of the adsorption energy of carbon dioxide in the Mg-MOF-74 metal-organic framework[J]. The Journal of Physical Chemistry A, 2019, 123(40): 8734-8743. [113] Gäumann P, Rohrbach T, Artiglia L, et al.Tandem hydroformylation-aldol condensation reaction enabled by Zn-MOF-74[J]. Chemistry - A European Journal, 2023, 29(38): e202300939. [114] Li Song, Wei Xiao, Zhu Shiping, et al.Adsorption behaviors of SF6 decomposition gas on Ni-doped ZIF-8: a first-principles study[J]. Vacuum, 2021, 187: 110131. [115] Xiao Song, Jin Menglei, Chen Junyi, et al.Highly selective PAN@MOFs composite nanofiber for removal of C4F7N/CO2 harmful decomposition products[J]. Journal of Cleaner Production, 2024, 450: 141909.
2026, Vol. 41 
