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analizy SF6 N2 Mixtures Decomposition

analizy SF6 N2 Mixtures Decomposition

SF6-N2 (100/0-90%) mixtures by modelisation, and on energy spark decomposition ofthesame mixtures byexperiment. Asarcs andhighenergy sparks areenergeticaIly similar, theresults ofthe model arecompared totheexperimental ones. Abstract: The influence of solid organic insulators (Megelit, Teflon, polypropylene, polyethylene, Nylon, epoxy resins ...

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  • Analysis of SF6/N2 gas mixture decomposition by-products in

    Two methods have been carried out for the analysis of SF6/N2 gas mixture decomposition by-products in electric discharges: infrared spectroscopy and gas chromatography. The infrared spectroscopy is a rapid method from which we can have qualitative analysis about all the products in a mixture, except those having the same absorption lines.

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  • COLLISIONAL DECOMPOSITION OF SF6- - NIST

    lower dielectric properties of a SF6/ N2 mixture compared to those of pure SF 6. CID processes provide the dominant destruction mechanism for SF 6- with absolute cross sections approaching 35A2 at higher energies. The decomposition cross sections of SF6- in collisions with N2 are similar to those observed for rare gas targets.

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  • Thermal Decomposition Properties of Epoxy Resin in SF₆/N₂ Mixture

    The results showed that thermal properties of 20% SF₆/N₂ (volume fraction of SF₆ is 20%) mixture has faster degradation than 40% SF₆/N₂ mixture. As ratio of SF₆ content decreases, thermal stability of the system decreases, and the decomposition process of SF₆ is exacerbated.

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  • Collisional decomposition of the sulfur hexaflouride anion (SF;)

    SF6 content, a SF6/N2 mixture exhibits many of the desir-able properties of SF6 as a gaseous dielectric. It has been suggested that this mixture may constitute a synergistic com-bination: The buffer gas (N2) serves to cool energetic elec-trons into the low-energy region where the electronegative gas (SF6) captures them with a remarkably high cross-section, thereby inhibiting the buildup of free electrons that

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  • Chemical Decomposition of High Pressure SF6/N2 (5:95

    Under the effect of the corona discharges which can occur in these equipments, part of the SF 6 and of N 2 will dissociate and lead, in the presence of even low concentrations of H 2 0 and/or 0 2, to the formation of a lot of other gaseous compounds: (SF 4 +SOF 2), SOF 4, S0 2 F 2, S 2 F 10, NF 3....Previous studies on the decomposition of SF 6 /N 2 (10:90) mixtures under coronas 3 showed that, with no impurity added, the total quantity of by-products formed is not very different from that

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  • SF 6 2 SF

    decomposition of these gas mixtures under such stress must be studied. In this paper, the chemical stability under negative corona of SF 6 and SF 6–N 2 (10:90) or (5:95) mixtures was investigated at 400kPa on adding percentages of CO 2 up to 80%. The corona discharges were generated at 23˚C in a 340cm3 experimental

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  • Thermal Decomposition Properties of Epoxy Resin in SF6/N2 Mixture

    surface in SF6/N2 mixture. Also thermal decomposition process of epoxy resin was simulated by the ReaxFF force field to reveal basic chemical reactions in terms of bond-breaking order, which further verified that CO2 and H2O produced during thermal decomposition of epoxy resin can intensify degradation of SF6 dielectric property.

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  • Thermal Decomposition Properties of Epoxy Resin in SF6/N2 Mixture

    The decomposition extent of epoxy resin in three mixed gases follows: 20% SF 6 /N 2 30% SF 6 /N 2 40% SF 6 /N 2, that is to say, in the mixture of 20% SF 6 /N 2, weight loss of epoxy resin was more severe than in the mixture of 40% SF 6 /N 2. Figure 1.

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  • Analysis of By-Products of N2-SF6 Gas Mixtures Sparked under

    A vast data on formation of by-products due to arc and spark decomposition of SF6 is available in literature [1–10]. But experimental work relating to N2 - SF6gas mixtures is limited.

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  • Decomposition Properties of C4F7N/N2 Gas Mixture: An

    The decomposition characteristics of N 2 are better than that of C 4 F 7 N. The addition of N 2 has a certain buffering effect to avoid the massive decomposition of C 4 F 7 N. The global warming potential value of a gas mixture containing 20% C 4 F 7 N decreased by 94.32% compared with SF 6.

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  • Decomposition Properties of C4F7N/N2 Gas Mixture: An

    The insulation characteristics and decomposition components of C4F7N/N2 gas mixture, a potential substitute for SF6, were firstly explored by breakdown experiments/gas chromatography-mass

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  • Chemical Decomposition of High Pressure SF6/N2 (5:95

    Sulfur hexafluoride (SF6) is the insulator gas used in most of equipments handling high and very high voltages.Owing to its high global warming potential, SF6 has been classified during the Kyoto conference on climate change among the greenhouse gases. Its emission in the atmosphere must therefore be reduced1. In order to comply with this aim, one of the solutions adopted by the manufacturers

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  • Formaldehyde preparation methods for pressure and temperature

    Here, an admixture of CO2 is served for real time temperature measurement based on Raman scattering. The applicability of the fast laser heating system has been demonstrated with gas mixtures of SF6 + air, SF6 + N2, as well as SF6 + N2 + CO2 at 1 bar total pressure. PMID: 26724008

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  • Sparking-induced decomposition of 10% SF6-90% N2 mixtures

    In context of insulation and environmental properties, decomposition products in SF6-N2 mixtures in the presence of H2O are analyzed by Density Function Theory (DFT).

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  • Thermal Decomposition Properties of Epoxy Resin in SF6/N2 Mixture

    Thermal Decomposition Properties of Epoxy Resin in SF6/N2 Mixture Wen, Hao;

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  • Study on the Thermal Decomposition Characteristics of C5F10O

    Studies have shown that the thermal decomposition products of C 5 F 10 O/N 2 /N2 gas mixture at high temperature are C 2 F 4, CO 2, C 4 F 10, C 3 F 6, C 3 F 7 H, C 3 F 8, CF 4, C 2 F 6, C 4 F 6 O 3 and C 6 F 14. C 5 F 10 O gas decomposes at 300°C to produce a small amount of C 3 F 6, and the temperature above 400°C will produce C 4 F 6 O 3 and C 6 F 14.

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  • Thermal decomposition properties of fluoronitriles-N2 gas

    Jan 01, 2020 · The decomposition products should be monitored after short-circuiting tests and then analyzed and checked how toxic they are. As mentioned above, the C 4 F 7 N-N 2 gas mixture shows great thermal stability. The decomposition of C 4 F 7 N-N 2 gas mixture starts at temperature higher than 350℃, generating a small amount of C 3 F 6.

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  • Insulating gases - ScienceDirect

    May 20, 1988 · 4. SF6 decomposition and toxicity of SF6 decomposition byproducts Studies of the positive ions produced in SF, at short times (- 10-3 s) following a discharge showed that in sparked, pure SF, positive ions of the form SXFy (where y is either zero or odd integer, and x = 2 to 16) are formed which are practically deficient in fluorine (y/x < 2).

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  • Süleyman Sungur TEZCAN | Gazi University - Academia.edu

    In context of insulation and environmental properties, decomposition products in SF6-N2 mixtures in the presence of H2O are analyzed by Density Function Theory (DFT). Homo and Lumo structures of ten decomposition products are given with the optimized geometries employing B3LYP hybrid method at the 6-311+G(d,p) level.

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  • The Performance of Insulation and Arc Interruption of the

    Moreover, breakdown voltage of 20%SF 6 –80%N 2 mixture is 57.7 kV, roughly 70% of the value of SF 6, which is in agreement with data of other researchers. Figure 1 compares the insulation property of CF 3 I-N 2 gas mixtures [ 2] with SF 6 and SF 6 -N 2 gas mixtures in slightly nonuniform electric field.

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  • Thermal Decomposition Properties of Epoxy Resin in SF6/N2 Mixture

    As a promising alternative for pure SF₆, the mixture of SF₆/N₂ appears to be more economic and environment-friendly on the premise of maintaining similar dielectric properties with pure SF₆. But less attention has been paid to the thermal properties of an SF₆/N₂ mixture, especially with insulation materials overheating happening simultaneously. In this paper, thermal decomposition

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  • Application of SF6 mixture gases in GIS in Northern China

    mixtures reclaiming is quite different from reclaiming pure SF 6, plenty of work has to be done concerning SF 6 mixture preparing and recycling. SF 6-CF 4 mixture can be efficiently separated by using cryogenic separation. Meanwhile, diluted SF 6-N 2 mixtures can be effectively separated by a combined membrane/sorption technique. Moreover,

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  • High Voltage Engineering Research Papers - Academia.edu

    In context of insulation and environmental properties, decomposition products in SF6-N2 mixtures in the presence of H2O are analyzed by Density Function Theory (DFT). Homo and Lumo structures of ten decomposition products are given with the optimized geometries employing B3LYP hybrid method at the 6-311+G(d,p) level.

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  • Separation of SF6 from Gas Mixtures Using Gas Hydrate

    Jul 27, 2010 · The three-phase equilibria of hydrate (H), liquid water (LW), and vapor (V) for the binary SF6 + water mixture and for the ternary N2 + SF6 + water mixtures with various SF6 vapor compositions (10, 30, 50, and 70%) were experimentally measured to determine the stability regions and formation conditions of pure and mixed hydrates.

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  • ANALYSIS OF BY-PRODUCTS OF N -SF6 GAS MIXTURES SPARKED UNDER

    Analysis of sparked SF6, SF6-N2 gas mixture and SF6-N2 gas mixture with six different spacer materials have been carried out and reported in this paper. A needle - plane electrode configuration was used and the by-products fonned due to spark discharges under these conditions have been compared. The duration of

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  • Possible High Pressure Nitrogen-Based Insulation for

    The YO SF6 in mixtures with N2 is indicated. Impulse Breakdown of SFg/N2 Mixtures Lightning and switching surge breakdown for SFm2 mixtures in a 89/226 mm (diameters) coaxial geomew was measured in 191. Relatively small additions of SF6 to N2 gave large improvements. Figure 4 shows reasonable agreement for measured breakdown fields for

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  • Sezai Dincer | Near East University - Academia.edu

    Many studies on N2+SF6 binary gas mixtures have been reported in the literature as an alternative to pure SF6 which is used in high-voltage power apparatus and systems. However, information on the response of N2+SF6 to limiting orthogonal electric and magnetic fields is lacking in the literature.

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  • and SF6-N2 (10-90)mixtures COLL CLAVREUL R., EDF DER, Moret

    SF6-N2 (100/0-90%) mixtures by modelisation, and on energy spark decomposition ofthesame mixtures byexperiment. Asarcs andhighenergy sparks areenergeticaIly similar, theresults ofthe model arecompared totheexperimental ones. Abstract: The influence of solid organic insulators (Megelit, Teflon, polypropylene, polyethylene, Nylon, epoxy resins

    Get Price
  • China OEM/ODM Supplier Sf6 Prurity Tester - LK403B SF6

    The LK403B SF6 Decomposition Ion Mobility Analyzer has been designed for controlling the SF6-quality in disconnecting switches, bus bars and circuit breakers in Gas Insulated Substations (GIS). This device allows the measurement of the contamination (total of decomposition products), the SF6-percentage based on SF6-air (or nitrogen) mixtures

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  • Expat Dating in Germany - chatting and dating - Front page DE

    Expatica is the international community’s online home away from home. A must-read for English-speaking expatriates and internationals across Europe, Expatica provides a tailored local news service and essential information on living, working, and moving to your country of choice.

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