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SF6 Decomposition process Quantitative

SF6 Decomposition process Quantitative

The invention discloses a qualitative and quantitative analysis method for a sulfur hexafluoride (SF6) gas discharge decomposition product. The method comprises the following steps of: sampling; performing qualitative and quantitative analysis on a sample by a gas chromatograph-mass spectrograph, wherein a quadrupole rod quality detector is adopted, and a chromatographic column is a CP-Sil 5 ...

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  • Quantitative analysis of decomposition products of sulfur

    Electrical utilities use sulfur hexafluoride (SF 6) as an electrical insulator in many components of their power systems.Under normal conditions SF 6 is stable, but in electrical discharges SF 6 decomposes into many byproducts. With an FT-IR spectrometer and a 20-m cell, we have examined the byproducts from various discharges and obtained quantitative analyses of components down to 1 ppm (partCited by: 3

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  • The SF6 Decomposition Mechanism: Background and

    Gas Insulated Switchgear (GIS) has been widely used in substations. The insulating medium used in GIS is sulfur hexafluoride (SF6) gas. However, the internal insulation defect existed in GIS would inevitably lead to partial discharge (PD), and cause the composition of SF6 to SOF2, SO2F2 and SO2 and other characteristic component gases. The decomposition phenomenon would greatly reduce theCited by: 1

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  • The decomposition products of sulfur hexafluoride (SF6

    Nov 01, 20071. Introduction. Sulfur hexafluoride (SF 6), molecular weight 146.07, is a colorless, odorless, nonflammable and heavy gas with excellent electrical characteristics that make it applicable for some special uses in the electrical/electronic equipments, industrial processes, scientific fields and commercial products , , .Due to its low toxicity, thermal stability and high breakdown strengthCited by: 117

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  • SF6 Decomposition in Gas-Insulated Equipment - IEEE

    This paper reviews previous research in SF6 decomposition relating to the operation of gas-insulated switchgears, gas-insulated transmission lines, and electrostatic accelerators. Results on the qualitative and quantitative determination of the by-products and their formation ion rates in various modes of electrical discharges are summarized.

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  • CN103105441B - Qualitative and quantitative analysis

    The invention discloses a qualitative and quantitative analysis method for a sulfur hexafluoride (SF6) gas discharge decomposition product. The method comprises the following steps of: sampling; performing qualitative and quantitative analysis on a sample by a gas chromatograph-mass spectrograph, wherein a quadrupole rod quality detector is adopted, and a chromatographic column is a CP-Sil 5Author: 裘吟君, 陈晓琳, 陈林聪, 张薇, 李欣然

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  • Research on Solid Products of SF6 Decomposition Under

    Recent investigations on sulfur hexafluoride decomposition have shown the need of a rapid and efficient method for the qualitative and quantitative analysis of the reaction products.

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  • CN103616445A - Analytic method of SF6 decomposition

    The invention discloses an analytic method of SF6 (sulfur hexafluoride) decomposition products. A sample is analyzed through gas chromatography-mass spectrometry. The analytic method disclosed by the invention is capable of performing qualitative and quantitative analysis on compounds by using the characteristic ions of different target compounds as selective ions; in combination with optimal

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  • SF6 By-products: Safety, Cleaning, and Disposal Concerns

    6 Decomposition and Contamination • Reactive decomposition byproducts form when SF 6 is exposed to: 1. spark discharges, 2. partial discharges, 3. switching arcs, and 4. failure arcing • Decomposition byproducts can take the form of gas or powders • Other types of contaminants can include moisture and air (from handling or leakage),

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  • Fourier transform infrared spectroscopy quantitative

    Feb 05, 2015Quantitative research on SF 6 decomposition components was conducted in this study based on the FTIR method. The absorption coefficients of several types of SF 6 decomposition components were confirmed, and the quantitative relationships among gas production rate, PD time, and PD quantity were studied.

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  • Fourier transform infrared spectroscopy quantitative

    Gas-insulated switchgear (GIS) internal SF 6 gas produces specific decomposition components under partial discharge (PD).

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  • Quantitative detection of trace H2S based on ultraviolet

    Li X 2016 The quantitative detection research of SF6 characteristic decomposition components SO2 and CS2 based on ultraviolet differential optical absorption spectrometry (Chongqing, China: Chongqing University) Google Scholar

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  • Ultraviolet differential optical absorption spectrometry

    spectrometry: quantitative analysis of the CS 2 produced by SF 6 decomposition To cite this article: Xiaoxing Zhang et al 2017 Meas. Sci. Technol. 28 115102 experimental study of SF6 decomposition View the article online for updates and enhancements. Related content Partial discharge early-warning through ultraviolet spectroscopic detection of SO2

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  • Insights on decomposition process of c-C4F8 and c-C4F8/N2

    It was found that the decomposition of c-C 4 F 8 /N 2 mainly produces CF 2, F, CF 3, CF, C, CF 4 and C 2 F 4. c-C 4 F 8 can decompose to C 2 F 4 by absorbing 43.28 kcal/mol, which is the main decomposition path and this process easily occurs under high temperature. There is a dynamic equilibrium process among the various produced radicals

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  • Thermal decomposition properties of fluoronitriles-N2 gas

    Jan 01, 2020The 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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  • Ultraviolet differential optical absorption spectrometry

    Oct 12, 2017The occurrence of partial discharge or partial overthermal fault in sulfur hexafluoride (SF 6)-insulated electrical equipment frequently causes SF 6 and solid insulation materials to decompose into various products. One of the most characteristic products of this process is carbon disulfide (CS 2).The internal fault type and severity of the fault in the insulation equipment can be detected

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  • Byproducts of Sulfur Hexafluoride (SF6) Use in the

    Sulfur hexafluoride (SF 6) is a relatively nontoxic gas used in a number of applications for its inert qualities. The dielectric and other physical and chemical properties related to its lack of reactivity have led to the extensive use of SF 6 as an insulating medium in switching equipment (e.g., circuit breakers) by electric utilities. While SF 6

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  • Correlation Analysis between Formation Process of SF6

    The decomposition characteristics of a SF6 gas-insulated medium were used to diagnose the partial discharge (PD) severity in DC gas-insulated equipment (DC-GIE).

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  • Xin Lis research works | Tianjin Medical University

    Xin Lis 24 research works with 483 citations and 1,663 reads, including: Ligand fishing with cellular membrane-coated cellulose filter paper: a new method for screening of potential active

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  • Fourier transform infrared spectroscopy quantitative

    Feb 05, 2015Fourier transform infrared spectroscopy quantitative analysis of SF6 partial discharge decomposition components. Zhang X(1), Liu H(1), Ren J(2), Li J(1), Li X(1). Author information: (1)(a)State Key Laboratory of Power Transmission Equipment System Security and New Technology, School of Electrical Engineering, Chongqing University, Chongqing

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  • Optical technology for detecting the decomposition

    1. Introduction. Sulfur hexafluoride (SF 6) is a reliable insulating gas and has excellent arc-extinguishing properties.SF 6-insulated electrical equipment, such as switchgear, transformers, and lines, is widely used in city power grids and ultrahigh-voltage power transmission systems owing to its small footprint, high reliability, and long service life.

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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 first explored by breakdown experiments/gas chromatography–mass spectrometer. The structural properties of C4F7N molecule and the decomposition mechanism of C4F7N/N2 gas mixture were analyzed based on the density functional theory calculation and ReaxFF

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  • Ultraviolet differential optical absorption spectrometry

    The occurrence of partial discharge or partial overthermal fault in sulfur hexafluoride (SF 6 )-insulated electrical equipment frequently causes SF 6 and solid insulation materials to decompose into various products. One of the most characteristic products of this process is carbon disulfide (CS 2 ). The internal fault type and severity of the fault in the insulation equipment can be detected

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  • Atmospheric SF6: Trends, Sources, and Prospects

    Sulfur hexafluoride (SF6) is the most potent greenhouse gas known. Its atmospheric concentration has increased by 2 orders of magnitude since industrial production started in 1953. Once released into the atmosphere, SF6 will only be removed exceedingly slowly due to its atmospheric lifetime of about 3200 yr. These features have brought SF6 into the climatic impact discussion aimed at reduction

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  • Cantilever enhanced photoacoustic spectrometry

    The SF 6 decomposition and its reaction to form H 2 S were simulated.. Quantitative researches on H 2 S were carried out based on CEPAS detection platform.. Detection sensitivity to H 2 S of the detection platform were 0.84 μL/L and 1.75 μL/L.. The influence of temperature and pressure on the detection platform were analyzed.

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  • CN103616445B - Analytic method of SF6 decomposition

    The invention discloses an analytic method of SF6 (sulfur hexafluoride) decomposition products. A sample is analyzed through gas chromatography-mass spectrometry. The analytic method disclosed by the invention is capable of performing qualitative and quantitative analysis on compounds by using the characteristic ions of different target compounds as selective ions; in combination with optimal

    Get Price
  • Cantilever enhanced photoacoustic spectrometry

    Sep 01, 20161. Introduction. Sulfur hexafluoride (SF 6) gas-insulated equipment are widely used in high voltage, super-high voltage and ultra-high voltage areas of power system and they are characterized by high reliability, small volume, flexible configuration, low maintenance costs, and others , , .Under ambient temperature and pressure, pure SF 6 is a kind of inert gas with stable chemical properties.

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  • Analysis of the Sensitivity of K-Type Molecular Sieve

    Sulfur hexafluoride (SF 6) is widely utilized in gas-insulated switchgear (GIS).However, part of SF 6 decomposes into different components under partial discharge (PD) conditions. Previous research has shown that the gas responses of intrinsic and 4 Å-type molecular sieve-deposited multi-wall carbon nanotubes (MWNTs) to SOF 2 and SO 2 F 2, two important decomposition components of SF 6, are

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