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Reaction Thermodynamics of Overthermal Decomposition of C6F12O

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Proceedings of the 21st International Symposium on High Voltage Engineering (ISH 2019)

Part of the book series: Lecture Notes in Electrical Engineering ((LNEE,volume 599))

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Abstract

The greenhouse effect caused by SF6 in the power industry cannot be ignored anymore. The environmentally friendly insulating gas C6F12O has the potential to replace SF6 in the medium and low pressure gas insulated switchgear C-GIS, but the thermostability problem has not been revealed so far when a partial overthermal fault occurs in C-GIS. For this purpose, this paper firstly carried out the C6F12O partial overthermal decomposition experiment on the existing decomposition experimental system of gas insulating medium. According to the results detected by Gas Chromatography-Mass Spectrometer GC/MS and calculated by theoretical simulation, it can be seen that the main products of C6F12O decomposition at high temperature are CO, CF4, C2F4, C2F6, C3F6, C3F8, C4F8, C4F10, C5F12, C6F14. Based on the experimental research, the molecular geometry optimization of C6F12O and main decomposed products was carried out by the density functional theory Hybrid:B3LYP method, and the various bond energies in the C6F12O were calculated. From the perspective of bond energy, the sequence and possibility of bond breaking of C6F12O in overthermal state are analyzed in detail. The thermodynamic characteristics of the overthermal decomposition of C6F12O under overthermal state were calculated in detail. The thermal stability of C6F12O was revealed at the molecular level, which laid a theoretical foundation for the future study of C6F12O insulation thermostability.

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Acknowledgments

This work is partially supported by the by national natural science foundation of China (51877157 and 51607127).

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Authors and Affiliations

  1. Wuhan University, Hubei, 430072, China

    F. P. Zeng, Z. C. Lei & J. Tang

  2. Electric Power Research Institute of Chongqing Power Company, Chongqing, 401123, China

    Y. L. Miao & Q. Yao

Authors
  1. F. P. Zeng
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  2. Z. C. Lei
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  3. Y. L. Miao
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  4. Q. Yao
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  5. J. Tang
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Corresponding author

Correspondence to F. P. Zeng .

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Editors and Affiliations

  1. High Voltage Laboratory, Budapest University of Technology and Economics, Budapest, Hungary

    Bálint Németh

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Zeng, F.P., Lei, Z.C., Miao, Y.L., Yao, Q., Tang, J. (2020). Reaction Thermodynamics of Overthermal Decomposition of C6F12O. In: Németh, B. (eds) Proceedings of the 21st International Symposium on High Voltage Engineering. ISH 2019. Lecture Notes in Electrical Engineering, vol 599. Springer, Cham. https://doi.org/10.1007/978-3-030-31680-8_5

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  • DOI: https://doi.org/10.1007/978-3-030-31680-8_5

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-030-31679-2

  • Online ISBN: 978-3-030-31680-8

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