A Study on the Efficient Degradation of Sulfur Hexafluoride by Pulsed Dielectric Barrier Discharge Synergistic Active Gas

Ying Zhang, Mingwei Wang, Yalong Li (), Lei Yu, Zhaodi Yang and Kun Wan
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Ying Zhang: Scientific Research Institute of Electric Power, Guizhou Power Grid Company Ltd., Guiyang 550000, China
Mingwei Wang: Scientific Research Institute of Electric Power, Guizhou Power Grid Company Ltd., Guiyang 550000, China
Yalong Li: Scientific Research Institute of Electric Power, Guizhou Power Grid Company Ltd., Guiyang 550000, China
Lei Yu: Hubei Engineering Research Center for Safety Monitoring of New Energy and Power Grid Equipment, Hubei University of Technology, Wuhan 430068, China
Zhaodi Yang: Hubei Engineering Research Center for Safety Monitoring of New Energy and Power Grid Equipment, Hubei University of Technology, Wuhan 430068, China
Kun Wan: Hubei Engineering Research Center for Safety Monitoring of New Energy and Power Grid Equipment, Hubei University of Technology, Wuhan 430068, China

Energies, 2024, vol. 17, issue 15, 1-12

Abstract: SF 6 is a strong greenhouse effect gas, which is widely used in high-voltage electrical equipment such as circuit breakers and high-voltage switchgear because of its excellent insulation performance and arc extinguishing ability. In recent years, the use and emission of SF 6 have been rising, and with the proposal of the dual carbon strategic goal, its harmless degradation has become an urgent problem to be solved. In this paper, SF 6 was degraded by pulsed DBD plasma technology and O 2 . Studies have shown that the addition of O 2 can effectively promote the degradation of SF 6 . With the increase in the added O 2 content, the DRE and EY of SF 6 first increased and then decreased. Under the conditions of the input power of 50 W, SF 6 concentration of 2%, and gas flow rate of 50 mL/min, the reaction system obtained the highest DRE and EY of 58.40% and 5.24 g/kWh when the O 2 content was 1%, respectively. In the SF 6 /Ar/O 2 /H 2 O system, the addition of H 2 O could improve the product selectivity of SO 2 F 2 , and when the O 2 concentration was 1%, the highest selectivity of SO 2 F 2 was 48.96%, and the concentration was 8006.76 ppm. The addition of O 2 inhibited the production of SO 2 , and with the addition of the O 2 system, SO 2 F 2 and SOF 4 were the main components of degradation products; however, there were also SOF 2 , SO 2 , SiF 4, SF 4 , etc. In this paper, the decomposition path of O 2 under SF 6 was analyzed in detail according to infrared spectroscopy and decomposition products.

Keywords: dielectric barrier discharge (DBD); SF 6; destruction and removal efficiencies (DRE); plasma; oxygen (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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