Decomposition Mechanism of C<sub>5</sub>F<sub>10</sub>O: An Environmentally Friendly Insulation Medium

Zhang, Xiaoxing; Li, Yi; Xiao, Song; Tang, Ju; Deng, Zaitao

doi:10.1021/acs.est.7b02419

Cited by 85 publications

(46 citation statements)

References 31 publications

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“…Zhang et al [40,41] studied the decomposition mechanism of C 5 F 10 O products by gas chromatographymass spectrometry (GC-MS) and density functional theory (DFT). The reaction paths of C 5 F 10 O are shown in Figure 4.…”

Section: Perfluoropentanone (C 5 F 10 O)mentioning

confidence: 99%

Alternative Environmentally Friendly Insulating Gases for SF6

Wang¹,

Huang²,

Liu³

et al. 2019

Processes

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Sulfur hexafluoride (SF6) shows excellent insulation performance as an insulating gas. It is suitable for various climate conditions due to its low boiling point (−64 °C). Therefore, it has been widely used in power grid equipment. However, its global warming potential (GWP) is 23,500 times higher than that of CO2. Thus, it is imperative to find an environmentally friendly insulating gas with excellent insulation performance, lower GWP, and which is harmless to equipment and workers to replace SF6. In this review, four possible alternatives, including perfluorocarbons, trifluoroiodomethane, perfluorinated ketones, and fluoronitrile are reviewed in terms of basic physicochemical properties, insulation properties, decomposition properties, and compatibility with metals. The influences of trace H2O or O2 on their insulation performances are also discussed. The insulation strengths of these insulating gases were comparable to or higher than that of SF6. The GWPs of these insulating gases were lower than that of SF6. Due to their relatively high boiling point, they should be used as a mixture with buffering gases with low boiling points. Based on these four characteristics, perfluorinated ketones (C5F10O and C6F12O) and fluoronitrile (C4F7N) could partially substitute SF6 in some electrical equipment. Finally, some future needs and perspectives of environmentally friendly insulating gases are addressed for further studies.

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Section: Perfluoropentanone (C 5 F 10 O)mentioning

confidence: 99%

Alternative Environmentally Friendly Insulating Gases for SF6

Wang¹,

Huang²,

Liu³

et al. 2019

Processes

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“…To predict the impact on the environment, future work should be done to check the feasibility of introducing the RF. Additionally, the decomposition products of the larger molecules after discharge [50], which contains CF4 [51], should also be considered.…”

Section: B Discussion About the Impact On The Environmentmentioning

confidence: 99%

Prediction of the Electrical Strength and Boiling Temperature of the Substitutes for Greenhouse Gas SF₆ Using Neural Network and Random Forest

et al. 2020

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Finding substitutes for sulfur hexafluoride (SF6), a gas with extremely high global warming potential, has been a persistent effort for years in the field of high voltage power equipment, which focuses on the evaluation of the electrical strength and boiling temperature for the practical purpose. Following up the previous proposed linear regression models, this work introduces machine learning algorithms including artificial neural network (ANN) and random forest (RF) as the potential approaches to predict the electrical strength and boiling temperature. Based on a series of descriptors derived from the molecular structure of 74 molecules, the performance of three different methods: multiple linear regression, artificial neural network and random forest are compared and assessed in terms of the sensitivity to the sample size, prediction accuracy and stability, and the interpretability of predictors. Considering the available data are limited, random forest shows superior performance with higher robustness and efficiency. The same approaches were applied to the boiling temperature and random forest produced better results as well. Besides, the variable importance ranked by RF improves understanding of the correlation between the molecular properties and electrical strength. It provides important insights to analyze the properties of the SF6 substitutes during the design and synthesis of the new eco-friendly gases in power equipment.

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“…Considering this, high voltage equipment manufacturers and research institutions worldwide have been trying to find a suitable alternative to replace SF 6 in all current equipment required for use in the energy sector. Present solutions are focused on the use of natural gases such as carbon dioxide, nitrogen or technical air at higher pressures to match the insulation and interruption capability of SF 6 or the use of electronegative gas mixtures with high mixture ratios of the same natural buffer gases [ 4 , 5 , 6 , 7 , 8 , 9 ].…”

Section: Introductionmentioning

confidence: 99%

A Comparison of Partial Discharge Sensors for Natural Gas Insulated High Voltage Equipment

Widger

Carr

Hills

et al. 2020

Sensors

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The research in this paper consists of practical experimentation on a gas insulated section of high voltage equipment filled with carbon dioxide and technical air as a direct replacement to sulphur hexafluoride (SF6) and analyses the results of PD measurement by way of internal UHF sensors and external HFCTs. The results contribute to ongoing efforts to replace the global warming gas SF6 with an alternative such as pure carbon dioxide or technical air and are applicable to mixtures of electronegative gases that have a high content of buffer gas including carbon dioxide. The experiments undertaken involved filling a full-scale gas insulated line demonstrator with different pressures of CO2 or technical air and applying voltages up to 242 kV in both clean conditions and particle contaminated conditions. The results show that carbon dioxide and technical air can insulate a gas section normally insulated with SF6 at phase-to-earth voltage of 242 kV and that both HFCT and UHF sensors can be used to detect partial discharge with natural gases. The internal UHF sensors show the most accurate PD location results but external HFCTs offer a good compromise and very similar location accuracy.

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Decomposition Mechanism of C₅F₁₀O: An Environmentally Friendly Insulation Medium

Cited by 85 publications

References 31 publications

Alternative Environmentally Friendly Insulating Gases for SF6

Alternative Environmentally Friendly Insulating Gases for SF6

Prediction of the Electrical Strength and Boiling Temperature of the Substitutes for Greenhouse Gas SF₆ Using Neural Network and Random Forest

A Comparison of Partial Discharge Sensors for Natural Gas Insulated High Voltage Equipment

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Decomposition Mechanism of C5F10O: An Environmentally Friendly Insulation Medium

Cited by 85 publications

References 31 publications

Alternative Environmentally Friendly Insulating Gases for SF6

Alternative Environmentally Friendly Insulating Gases for SF6

Prediction of the Electrical Strength and Boiling Temperature of the Substitutes for Greenhouse Gas SF₆ Using Neural Network and Random Forest

A Comparison of Partial Discharge Sensors for Natural Gas Insulated High Voltage Equipment

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Product

Resources

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Decomposition Mechanism of C₅F₁₀O: An Environmentally Friendly Insulation Medium