电晕放电下C<sub>5</sub>F<sub>10</sub>O混合气体的分解特性

doi:10.19595/j.cnki.1000-6753.tces.191788

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Abstract

C₅F₁₀O, a potential SF₆ alternative gas, has high dielectric strength and low GWP. However, there are few studies on the decomposition characteristics of C₅F₁₀O. Based on density functional theory, the decomposition pathways of C₅F₁₀O were analyzed. The calculation shows that the formation of fluorocarbon decomposition products is related to the recombination or decomposition reaction of CF₃、F、C₃F₇ and other radicals. Furthermore, a series of AC corona discharge experiments on C₅F₁₀O/air and C₅F₁₀O/N₂ mixed gases were carried out, and GC-MS was used to detect the decomposition products. The concentration variation of fluorocarbon gas, carbon-oxygen gas and nitrile gas with the gas mixing ratio and the applied voltage was investigated. The results show that the main by-products of the two mixed gases are CO, CO₂, CF₄, C₂F₆, C₃F₈, C₂F₄and C₃F₆. The total content of fluorocarbon gases, the content of CO and the content of CO₂ are positively related to the mixing ratio of C₅F₁₀O and the applied voltage. From the perspective of application conditions and reduction of the types and toxicity of decomposition products, air with a ratio of 93.5%~96% is more suitable as a buffer gas for C₅F₁₀O.

Key words： C₅F₁₀O corona discharge decomposition characteristic buffer gas density functional theory

Received: 19 December 2019

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TM85

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	Articles by authors
	Zhou Zhenrui
	Han Dong
	Zhao Mingyue
	Zhang Guoqiang

Cite this article:

Zhou Zhenrui,Han Dong,Zhao Mingyue等. Decomposition Characteristics of C₅F₁₀O Mixtures under Corona Discharge[J]. Transactions of China Electrotechnical Society, 2021, 36(2): 407-416.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.191788 OR https://dgjsxb.ces-transaction.com/EN/Y2021/V36/I2/407

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