Theoretical Analysis of the Decomposition Pathways and Species of Environmentally Friendly Insulation Gas C 6 F 12 O Bas
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Theoretical Analysis of the Decomposition Pathways and Species of Environmentally Friendly Insulation Gas C6F12O Based on the DFT and TST Feng Wang1,2 · Jie Liu1 · Lipeng Zhong1 · Bin Hai1 · Yongyan Zhou3,4 · Nian Tang3,4 · Li Li3,4 Received: 4 June 2020 / Accepted: 19 September 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract C6F12O (1,1,1,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)pentan-3-one) is one of the most potential alternative insulation medium to SF6 due to its excellent electrical strength and environmental effect. Although several works on the insulation and decomposition properties of C6F12O have been carried out in recent years, the detailed decomposition pathways and mechanism of C6F12O haven’t been revealed up to now. A comprehensive analysis of the decomposition mechanism of C 6F12O is performed through high-level quantum chemistry calculations with DFT and TST in this paper. The results show that more than ten decomposition products are formed. C4F10(a), C5F12(b), and CO can be used for evaluating slight failures. C 3F8, C2F6, C2F4, C3F6, C4F10(b), C5F12(a), C6F14(a) and C6F14(b) etc. can be taken as typical products when a general failure is caused in the equipment. C F4 can be used as a basis for determining whether a serious failure has occurred in the gas-insulated electrical equipment. According to the analysis, primary decomposition products such as 5F12(b) have relatively high dielectric strength. Besides, the concentration of C4F10(a) and C decomposition products of C 6F12O is low to have a major impact on the overall electrical performance at normal conditions. However, the insulation properties of C6F12O gas mixtures after the prolonged operation or multiple arc extinctions deserve further investigation. In the view of human safety and environmental effect, several toxic products such as C 2F4, CO, and C3F6 should be effectively managed and handled with care. This paper could provide a theoretical basis for related engineering applications. Keywords C6F12O · Density functional theory · Decomposition mechanism · Insulation properties
Electronic supplementary material The online version of this article (https://doi.org/10.1007/s1109 0-020-10129-4) contains supplementary material, which is available to authorized users. * Lipeng Zhong [email protected] Extended author information available on the last page of the article
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Plasma Chemistry and Plasma Processing
Introduction Sulfur hexafluoride (SF6) is widely used in the electrical power equipment as insulation and arc extinguishing gas medium [1]. However, it is 1 of the 6 most potent greenhouse gases, with a global warming potential (GWP) of almost 23,500 times higher than CO2 over the time horizon of 100 years and residence time in an atmosphere life of 3200 years due to its high chemical inertness [2–4]. With the increasing demand for low-carbon and environmental protection in the world, the use of SF6 has been restricted to use in the
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