Studies of corona and back discharges in carbon dioxide

Czech, T.; Sobczyk, Arkadiusz; Jaworek, A.; Krupa, A.; Rajch, E.

doi:10.1140/epjd/e2012-30572-7

Cited by 2 publications

(4 citation statements)

References 36 publications

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“…The discharge chamber, used also in previous experiments [5,16,17], was made of PMMA, in the form of cube of inner edge of 160 mm. The discharge was generated from needle of diameter of 1.5 mm and cone angle of about 15…”

Section: Methodsmentioning

confidence: 99%

“…Non-elastic collisions between energetic electrons and gaseous molecules will produce chemically active species. In electric discharge in CO 2 at atmospheric pressure, the spectrum is more complex because many overlapping bands of CO 2 , CO and C 2 systems are generated due to non elastic collisions between energetic electrons and CO 2 molecules [5,6,17]. Although the emission of CO 2 molecules cannot be observed in the investigated spectral range (because main emission lines are in the infrared range), the existence of CO 2 may be detected indirectly, e.g.…”

Section: Light Emission Spectramentioning

confidence: 99%

“…Behaviour of molecular compounds in flue gases in microwave induced plasma were studied by optical emission spectroscopy by Timmermans et al [7,15]. Czech et al have investigated back discharge in air, pure CO 2 [5,[16][17][18], and in flue gas simulating mixture [5]. Jasiński et al [19] presented results of spectroscopic measurements of temperature of neutral gas in microwave torch plasma (MTP) in nitrogen at atmospheric pressure, in air, and in their mixtures with methane.…”

Section: Introductionmentioning

confidence: 99%

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Light emission spectra of molecules in negative and positive back discharges in nitrogen with carbon dioxide mixture at atmospheric pressure

2015

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Abstract.Results of spectroscopic investigations and current-voltage characteristics of back discharge generated in point-plane electrode geometry with plate covered fly ash layer in a mixture of N2 + CO2 at atmospheric pressure, for positive and negative polarity of the discharge electrode are presented in this paper. Point-plane electrode configuration was chosen in these studies in order to simulate the physical processes occurring in electrostatic precipitator. Three forms of back discharge for both polarities were investigated: glow, streamers and low-current back-arc. Diatomic reactions and dissociation products of N2 and CO2 (OH, NO, CN), atoms from fly ash layer (N, Ti, Na), free radicals, molecules or ions, which have unpaired valence electrons, and other active species, e.g., N2 (in C,B,A-state), N + 2 (B) were identified in the discharges by the method of optical emission spectroscopy (OES). The measurements shown that atomic and molecular optical emission spectral lines from back discharge depend on the forms of discharge and the discharge current. In normal electrical discharges, the emission spectra are dominated by gaseous components, but in the case of back discharge, atomic lines belonging to chemical compounds of fly ash were also recorded and identified.

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Section: Methodsmentioning

confidence: 99%

Section: Light Emission Spectramentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Light emission spectra of molecules in negative and positive back discharges in nitrogen with carbon dioxide mixture at atmospheric pressure

2015

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“…FNS) transitions were taken from "Camacho et al, 2007 andGilmore et al, 1992". Transitions of CO were taken fromCzech et al (2013) andAl-Tuwirqi et al (2012). Transitions from C 2 and CN were taken fromWallace (1960);Wallace (1964);and Czech et al (2012).…”

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confidence: 99%

High‐Speed Spectroscopy of Lightning‐Like Discharges: Evidence of Molecular Optical Emissions

et al. 2021

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High speed spectra (between ∼380 nm and ∼800 nm) of meter‐long lightning‐like discharges recorded at 672,000 fps and 1,400,000 fps (with 1.488 and 0.714 μs time resolutions and 160 ns exposure time) show optical emissions of neutral hydrogen, singly ionized nitrogen, oxygen, and doubly ionized nitrogen which are similar to those found in natural lightning optical emissions. The spectra recorded in the near ultraviolet‐blue range (380–450 nm) and visible‐near infrared (475–793 nm) exhibited features of optical emissions corresponding to several molecular species (and emission bands) like cyanide radical (CN) (Violet bands), N2 (Second Positive System), N2+ (first negative system), C2 (Swan band) and CO (Quintet and Ångström bands). Molecular species can be formed at regions of the lightning‐like channel where the gas temperature would be milder and/or in the corona sheath surrounding the heated channel. We have quantified and compared electron densities and temperatures derived from different sets of neutral and ion line emissions and have found different sensitivities depending on the lines used. Temperatures derived from ion emissions are higher and change faster than those derived from neutral emissions.

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Studies of corona and back discharges in carbon dioxide

Cited by 2 publications

References 36 publications

Light emission spectra of molecules in negative and positive back discharges in nitrogen with carbon dioxide mixture at atmospheric pressure

Light emission spectra of molecules in negative and positive back discharges in nitrogen with carbon dioxide mixture at atmospheric pressure

High‐Speed Spectroscopy of Lightning‐Like Discharges: Evidence of Molecular Optical Emissions

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