Arc Stability of Electronegative Gases

Manion, J. P.; Philosophos, J. A.; Robinson, Michael B.

doi:10.1109/tei.1967.298843

Cited by 20 publications

(6 citation statements)

References 14 publications

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“…In atmospheric gases byproduct formation is typically limited to ozone production and not a problematic issue for health or the environment. Most fluorinated compounds, including C 5 F 10 O and CF 3 I, form the stable byproduct CF 4 in electrical equipment under arcing conditions. ,− CF 4 is an extremely long-lived greenhouse gas with much higher GWP than the original compounds. It is also formed in SF 6 near organic materials such as polymeric spacers under partial discharge conditions .…”

Section: Assessment Of Sf6 Replacementsmentioning

confidence: 99%

Assessment of Eco-friendly Gases for Electrical Insulation to Replace the Most Potent Industrial Greenhouse Gas SF₆

Rabie

Franck

2018

Environ. Sci. Technol.

264

128

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Gases for electrical insulation are essential for the operation of electric power equipment. This Review gives a brief history of gaseous insulation that involved the emergence of the most potent industrial greenhouse gas known today, namely sulfur hexafluoride. SF paved the way to space-saving equipment for the transmission and distribution of electrical energy. Its ever-rising usage in the electrical grid also played a decisive role in the continuous increase of atmospheric SF abundance over the last decades. This Review broadly covers the environmental concerns related to SF emissions and assesses the latest generation of eco-friendly replacement gases. They offer great potential for reducing greenhouse gas emissions from electrical equipment but at the same time involve technical trade-offs. The rumors of one or the other being superior seem premature, in particular because of the lack of dielectric, environmental, and chemical information for these relatively novel compounds and their dissociation products during operation.

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Section: Assessment Of Sf6 Replacementsmentioning

confidence: 99%

Assessment of Eco-friendly Gases for Electrical Insulation to Replace the Most Potent Industrial Greenhouse Gas SF₆

Rabie

Franck

2018

Environ. Sci. Technol.

264

128

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“…of SF 6 on metal surfaces by direct heating [2]; 3) highpower, laser-initiated dissociation of SF 6 and SF10, mixtures [3][4][5]; 4) shock-tube pyrolysis of SF 6 /0, mixtures [6]; 5) low-pressure rf and microwave discharges [7][8][9][10]; 6) high-pressure arcs [11][12][13][14][15][16][17][18]; 7) spark discharges [19][20][21][22]; and 8) corona and glow type discharges such as those considered here [14,18,[23][24][25][26]. Precluding possible catalytic influences of metal vapors and surface reactions, it might be expected that, although the initial dissociation mechanisms and the degree of gas dissociation in these cases are quite different, the basic subsequent gas-phase chemical processes that yield oxyfluorides should be similar.…”

Section: Introductionmentioning

confidence: 99%

Production rates for oxyfluorides SOF2, SO2F2, and SOF4 in SF6 corona discharges

Brunt¹

1985

J. RES. NATL. BUR. STAN.

108

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The most abundant, long-lived stable gaseous species generated by corona discharges in SF 6 gas containing trace levels of 0, and H,0 are the oxyfluorides SOF,, SOF, and SOF 4 . Absolute energy and charge rates-ofproduction of these and the minor products SO,, OCS, and CO2 have been measured at different total gas pressures from 100 kPa to 300 kPa and for discharges of different current, power, and polarity. Oxyfluoride yields for SF6/02 mixtures containing up to 10% 0, have also been measured. The results indicate that oxyfluoride production is not controlled by the concentrations of either 0, or H,0 at levels below about I%, and the rate controlling factor is the dissociation rate of SF 6 in the discharge. The discharge current and time dependence of the production rates are discussed in terms of gas-phase mechanisms that have been proposed to explain previous observations of electrical, thermal, and laser-induced decomposition of SF 6 and SFs/O, mixtures. Upper limits on the total SF 6 decomposition rate in low-current discharges have been estimated. Details of the chemical analysis procedures are given, and application of the results to the design of chemical diagnostics for SF 6 -insulated, high-voltage apparatus is discussed.

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“…As could be seen in Table 1, Extensive regressions for the best-fit QSAR models have been performed by playing with the combinations of various descriptors (see Table S3 for examples in the supporting information). In terms of the correlation coefficient (R 2 ) and the root-mean-square deviation (RMSD) between experimental and theoretical data, the optimal QSAR model was obtained as follows, It should be noted that the other experimental characteristics on the interruption performance except for RRRV are available as well in literature for the selected gases [32,33]. However, these individual experimental data correspond to different arc mechanisms (e.g., plain-break arc) or test conditions (e.g., currents, pressures).…”

Section: Resultsmentioning

confidence: 99%

A quantum chemical prediction on arc interruption capability of dielectric gases

Zhang,

Hou,

Wang

2023

Int J of Quantum Chemistry

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The use of sulfur hexafluoride (SF6) as an electrical insulator and arc‐quenching gas in high‐voltage equipment raises serious environmental concerns. The search of a replacement gas for SF6 is hindered by a priori assessment on its interruption performance. The routine fluid or mathematic magneto‐hydrodynamic models for arc burning and extinguishing are too complex to be practical for virtual screening. Herein a state‐of‐the‐art quantum chemical model to predict the interruption capability of the dielectric gases straightforwardly has been established in terms of the rate of rise of the recovery voltage (RRRV). On the basis of the molecular electrostatic potentials, five sets of descriptors, including the global statistical parameters and , the site‐specific parameter ΔVs, the total positive surface area As+, augmented with the product of polarizability and dipole moment αμ, were optimized to reveal the inherent mechanisms for interruption and thus a viable structure–activity relationship mode for RRRV has been developed with the correlation coefficient 0.975. Theoretical RRRV relative to SF6 = 100 for all the known dielectric gases are in good agreement with the experimental data by a mean absolute deviation of 3.6. Accordingly, the perfluorinated cycloalkenes and alkynes, in particular, 1,3,3,3‐tetrafluoropropyne, are found to be the promising candidates as the replacement dielectric gases for SF6.

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Arc Stability of Electronegative Gases

Cited by 20 publications

References 14 publications

Assessment of Eco-friendly Gases for Electrical Insulation to Replace the Most Potent Industrial Greenhouse Gas SF₆

Assessment of Eco-friendly Gases for Electrical Insulation to Replace the Most Potent Industrial Greenhouse Gas SF₆

Production rates for oxyfluorides SOF2, SO2F2, and SOF4 in SF6 corona discharges

A quantum chemical prediction on arc interruption capability of dielectric gases

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Arc Stability of Electronegative Gases

Cited by 20 publications

References 14 publications

Assessment of Eco-friendly Gases for Electrical Insulation to Replace the Most Potent Industrial Greenhouse Gas SF6

Assessment of Eco-friendly Gases for Electrical Insulation to Replace the Most Potent Industrial Greenhouse Gas SF6

Production rates for oxyfluorides SOF2, SO2F2, and SOF4 in SF6 corona discharges

A quantum chemical prediction on arc interruption capability of dielectric gases

Contact Info

Product

Resources

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Assessment of Eco-friendly Gases for Electrical Insulation to Replace the Most Potent Industrial Greenhouse Gas SF₆

Assessment of Eco-friendly Gases for Electrical Insulation to Replace the Most Potent Industrial Greenhouse Gas SF₆