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Highly sensitive SF6 decomposition process

Highly sensitive SF6 decomposition process

In recent years, many novel sensing nanomaterials were explored experimentally and theoretically as chemical gas sensors to detect sulphur hexafluoride (SF6) decomposed species with rapid response, high sensitivity and selectivity, as well as low cost, in order to estimate and guarantee the operation status of SF6 insulation devices. However, there has been no systemic review yet to ...

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  • Highly Sensitive and Precise Analysis of SF6

    5 mins readA ppb-level CO sensor based on multi-comb optical-feedback cavity enhanced absorption spectroscopy with a 2.3 μm diode laser was developed for SF6 decomposition analysis in electric power system....

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  • The SF6 Decomposition Mechanism: Background and

    Jan 24, 2017The decomposition products of SF 6 contain some highly active substances, such as F, HF, and SO 2. They will further corrode solid insulation material and metal fasteners and generate substances such as CF 4 , COF 2 , C 3 F 8 , C 4 F 8 , C 4 F 10 , C 5 F 10 , C 6 F 12 , CF 8 S, CF 6 S 2 , CO, CO 2 , etc., which will form a vicious cycle and cause further solid insulation deterioration and finally induce sudden failuresCited by: 1

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  • OSA | Highly Sensitive H2S Detection for SF6 Decomposition

    A ppb-level hydrogen sulfide (H2S) gas sensor for sulfur hexafluoride (SF6) decomposition analysis was developed using photoacoustic spectroscopy technique and a watt-level excitation laser source. A minimum detection limit of 109 ppb was achieved.Cited by: 1

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  • OSA | Highly sensitive photoacoustic multicomponent gas

    A ppb-level photoacoustic multicomponent gas sensor system for sulfur hexafluoride (SF 6) decomposition detection was developed by the use of two near-infrared (NIR) diode lasers and an ultraviolet (UV) solid-state laser. A telecommunication fiber amplifier module was used to boost up the excitation optical power from the two NIR lasers.Cited by: 8

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  • Adsorption and sensing behaviors of SF6 decomposed

    May 15, 20201. Introduction. Sensing or removing SF 6 decomposed species is regarded as an effective manner to estimate or guarantee the operation status of the insulation system , , , , , .Unlike the low-fluoride sulfides such as SF 5, SF 4 and SF 3 that have the opportunity to compound with surrounding F ion and form SF 6, , , some stable chemicals such as SO 2, SOF 2 and SO 2 F 2,Cited by: 63

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  • A highly sensitive and selective SnS2 monolayer sensor in

    Mar 01, 2021However, partial discharge happens in gas-insulated equipment as time goes, resulting in the decomposition of SF 6 (products: SO 2 F 2, H 2 S, SO 2, HF, etc.),. The decomposed gas products accelerate partial discharge and sharply reduce the insulation strength of electrical equipment, leading to insulation fault,.

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  • A First-Principles Study of the SF 6 Decomposed Products

    Therefore, GeP monolayer is a potential candidate for highly sensitive and selective tunable SF6 decomposition gas sensor for on-line diagnostics of power equipment. View Show abstract

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  • Highly sensitive and selective sensing properties of

    May 15, 2020In the past few years, sulfur hexafluoride (SF6) insulated switch gears (GIS) have been extensively used in electrical engineering due to their excellent arc extension and insulation properties However, the partial electric discharge decomposes SF6 into sulfur containing gases (SCGs) like SO 2, SO 2 F 2, SOF 2 and H 2 S in presence of water and oxygen . These toxic SCGs can cause severe

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  • Highly Sensitive and Selective Sensing Properties of

    Request PDF | Highly Sensitive and Selective Sensing Properties of Modified Green Phosphorene Monolayers Towards SF6 Decomposition Gases | Gas sensing properties of pristine, defective and

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  • SF 6 Decomposition Gas Sensor Based on GeP Monolayer: A

    Apr 13, 2020Abstract: In this paper, we adopted the first-principles calculations to investigate the sensing properties of the GeP monolayer to four SF 6 decomposition gas molecules (H 2 S, SO 2, SO 2 F 2 and SOF 2).By discussing the calculated adsorption energy, charge transfer, work function variation combined with charge density difference and electron localization function analysis, we find that GeP

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  • Highly sensitive photoacoustic multicomponent gas

    Abstract:A ppb-level photoacoustic multicomponent gas sensor system for sulfur hexafluoride (SF6) decomposition detection was developed by the use of two near-infrared (NIR) diode lasers and an...

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  • Highly sensitive and selective polyaniline thin-film

    Feb 01, 2015H 2 S is an important and main decomposition component of SF 6 under intense partial discharge. In addition, in some other discharge (e.g., arc, spark or corona) or thermal fault H 2 S is also a main component after SF 6 decomposition. The existence of H 2 S is closely related to the degree and type of discharge.

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  • Phosphorene: A Promising Candidate for Highly Sensitive

    May 05, 2017Decomposition Gas Sensors. Abstract: Phosphorene is a promising candidate for gas sensing materials. This letter describes our study of the adsorption of SF 6 and SF 6 decomposition gases (SO 2 and H 2 S) on phosphorene. We used first principles calculations to explore phosphorenes potential applications as gas sensor to diagnose the state of online gas insulated

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  • OSA | Highly sensitive and selective CO sensor using a 2

    The online detection for SF 6 decomposition is an effective means for fault early warning of electric power transmission equipment, which is based on the fact that SF 6 can be decomposed in the case of superheating and a partial discharge (PD) caused by latent inner insulation defects.

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  • Janus MoSSe monolayer: A highly strain-sensitive gas

    Aug 15, 2020In sum, we concluded that the Janus MoSSe monolayer is a highly strain-sensitive gas sensing material to detect SF 6 decompositions. Our work can

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  • OSA | Highly sensitive SO2 photoacoustic sensor for SF6

    Due to the presence of electric arcs, sparks or coronas in electric power systems, SF 6 can be decomposed via the electronic, thermal and optical processes into sulphur fluorides (SF 2, SF 3 and SF 4), which in turn react with electrodes and gas impurities (trace amounts of air and water vapor) to form various chemically active by-products (such as SOF 4, SOF 2, SO 2 F 2, SO 2, CO and H 2 S).

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  • Multivariate Evaluation Method for Screening Optimum Gas

    In this study, four gas sensors based on metal-oxide semiconductors (WO 3, CeO 2, In 2 O 3, and SnO 2) were used as examples, and their performance in the detection of four decomposition products of sulfur hexafluoride (SF 6) was investigated. After gas-sensing experiments, values for working temperature, response value, and recovery capability were obtained.

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  • Highly selective detection of sulfur hexafluoride

    PDF | In this paper, a high-performance sensor based on tin oxide modified reduced graphene oxide (SnO2-rGO) has been prepared via a one-step... | Find, read and cite all the research you need on

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  • Tellurene Nanoflake-Based Gas Sensors for the Detection of

    Abstract. Tellurene has a phosphorene-like puckered configuration and exhibits great air stability. This characteristic makes it highly sensitive to some gases, and therefore, it has a huge potential in gas sensing applications. In this paper, the sensing performance of tellurene-based gas sensors toward SF 6 decomposition products, including H 2 S, SO 2, SO 2 F 2, and SOF 2, was systematically investigated.

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  • Multivariate Evaluation Method for Screening

    Finally, these scores were used to identify the optimal materials for detecting SF6 decomposition products. This procedure has the potential for selecting the best sensors for other gases.

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  • Optical technology for detecting the decomposition

    The methods of SF6 SF 6 decomposition products detection can be divided into chemical and optical methods. Chemical detection employs adsorption, separation, and other methods and the various physical and chemical properties of different products to detect decomposition product concentrations.

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  • Detection of trace disulfur decafluoride in sulfur

    Highly sensitive SO_2 photoacoustic sensor for SF_6 decomposition detection using a compact mW-level diode-pumped solid-state laser emitting at 303 nm. Optics Express 2017 , 25 (26) , 32581.

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  • Sensitivity Characteristic Analysis of Adsorbent-Mixed

    Sulfur hexafluoride (SF 6) gas decomposition results from the energy produced by partial discharge (PD).The detection of SO 2 and H 2 S content, as important characteristic components of the decomposition products, is significant in the determination of the insulation level of SF 6 gas and the inside insulation faults of gas-insulated equipment. A number of gas sensors use carbon nanotubes

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  • The Decomposition Pathways of SF6 in the Presence of

    This paper thoroughly investigates the decomposition pathways of SF6 in the presence of organic insulator vapors by means of high level quantum chemistry calculations with density functional theory. Optimized molecular structures and vibrational frequencies of intermediate products (IM) and transition states (TS) are first reported in this work. Potential energy surface is then investigated

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  • SF6 decomposition Collection Custom Designed

    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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  • IET Digital Library: Nanomaterials-based gas sensors of SF

    In recent years, many novel sensing nanomaterials were explored experimentally and theoretically as chemical gas sensors to detect sulphur hexafluoride (SF6) decomposed species with rapid response, high sensitivity and selectivity, as well as low cost, in order to estimate and guarantee the operation status of SF6 insulation devices. However, there has been no systemic review yet to

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  • Conference Presentations

    CONFERENCE PROCEEDINGS Papers Presentations Journals. Advanced Photonics Journal of Applied Remote Sensing

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  • Application of Graphene Gas Sensors in Online Monitoring

    Feb 07, 2017Graphene is an allotrope of carbon apart from graphite, diamond, fullerene and carbon nanotubes. Because graphene has unique mechanical, structural, thermal and electrochemical properties and can present the stability characteristics of these features, it becomes two‐dimensional (2‐d) materials which can alter three‐dimensional (3‐d) carbon nanotubes composite materials and has

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  • Quartz-enhanced photoacoustic spectroscopy for CO

    SPIE Digital Library Proceedings. CONFERENCE PROCEEDINGS Papers Presentations

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