Ozone production and de-NO x modeling in dry air electrical discharges

Deryugin, A A; Napartovich, A. P.; Gorse, C.; Paniccia, F.; Capitelli, M.

doi:10.1007/bf02766823

Cited by 23 publications

(13 citation statements)

References 10 publications

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“…Dielectric barrier discharges ͑DBDs͒, or silent electrical discharges, are being developed for plasma remediation of toxic gases and as advanced ultraviolet lighting sources. [1][2][3][4][5][6][7][8][9][10] The plasma in DBDs is sustained between parallel electrodes of which one ͑or both͒ is covered by a dielectric. The plasma operates in a pulsed filamentary mode and is composed of microdischarges having diameters of 10-100's m, durations of 10's ns and area densities of 10-100's cm Ϫ2 .…”

Section: Introductionmentioning

confidence: 99%

Multiple microdischarge dynamics in dielectric barrier discharges

Kushner

1998

Journal of Applied Physics

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Dielectric barrier discharges (DBDs) are pulsed atmospheric pressure devices in which the plasma forms as an array of microdischarges having diameters expanding from 10 to 100’s μm and area densities of 10 to 100’s cm−2. The microdischarges are <10’s ns in duration and are terminated by charging of the dielectric barrier which removes voltage from the gap. If microdischarges are spaced sufficiently close together they may interact during their expansion. In this article, we discuss results from a two-dimensional plasma hydrodynamics model for microdischarge development in DBDs with the goal of investigating the interaction between closely spaced microdischarges. We find that the efficiency of ionization is only moderately affected by microdischarges which expand into physical contact. The residual charge left on the dielectric following a current pulse can, however, significantly impact the spatial extent of the subsequent microdischarges. During expansion the underlying dielectric charges to progressively larger radii as the microdischarge expands. This leads to voltage collapse in the center of the microdischarge prior to the outer radius. In attaching gas mixtures larger rates of attachment relative to ionization at the lower values of the electric field/number density produce cores which are highly electronegative, surrounded by shells of higher electron density.

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Section: Introductionmentioning

confidence: 99%

Multiple microdischarge dynamics in dielectric barrier discharges

Kushner

1998

Journal of Applied Physics

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“…Among the reactions, the occurrence of which causes a drop in the ozone concentration with a temperature increase, especially reaction is mentioned. , Assuming that an increase in temperature in the microdischarge channel equals 100 °C (from 273 K up to 373 K), the rate constants can be calculated and the temperature dependence on the reaction rate effect can be estimated. For example, the k 5 constant rate of reaction increases as much as 10 times.…”

Section: Resultsmentioning

confidence: 99%

Application of Technical Kinetics for Macroscopic Analysis of Ozone Synthesis Process

Jodzis

2011

Ind. Eng. Chem. Res.

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The method of measuring the technical rate of ozone synthesis process, and the manner of utilizing the process rate for determining the boundary ozone contents in the reacting system has been presented. On the basis of macroscopic analysis of the process the reason causing the obtaining of the ozone concentration lower than that theoretically possible, has been pointed out. It is shown that an increase in temperature in the discharge gap does not inhibit the ozone-forming rate. The decrease in ozone concentration observed is a result of ozone intensive decomposition. However, under typical conditions of the process, the ozone decomposition is a result of the temperature in the microdischarge channels and not that of the gas or the cooling liquid.

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“…When the plasma was switched on, both N-related species (HNO 2 , N 2 O, NO 2 , NO) and C-related species (HCOOH, CO, CO 2 ) could be clearly identified. Ozone, which is frequently observed in air-containing DBDs, [27][28][29][30] was not detected under our experimental conditions. The OH radical, detected from OES, was absent here due to its high reactivity, short lifetime, and therefore low density.…”

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confidence: 77%

Infrared gas phase study on plasma-polymer interactions in high-current diffuse dielectric barrier discharge

Liu

Welzel

Starostin³

et al. 2017

Journal of Applied Physics

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Document VersionPublisher's PDF, also known as Version of Record (includes final page, issue and volume numbers) Please check the document version of this publication:• A submitted manuscript is the author's version of the article upon submission and before peer-review. There can be important differences between the submitted version and the official published version of record. People interested in the research are advised to contact the author for the final version of the publication, or visit the DOI to the publisher's website.• The final author version and the galley proof are versions of the publication after peer review.• The final published version features the final layout of the paper including the volume, issue and page numbers. Link to publication General rightsCopyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.• Users may download and print one copy of any publication from the public portal for the purpose of private study or research.• You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal ? Take down policyIf you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. Infrared gas phase study on plasma-polymer interactions in high-current diffuse dielectric barrier discharge A roll-to-roll high-current diffuse dielectric barrier discharge at atmospheric pressure was operated in air and Ar/N 2 /O 2 gas mixtures. The exhaust gas from the discharge was studied using a highresolution Fourier-transform infrared spectrometer in the range from 3000 to 750 cm À1 to unravel the plasma-polymer interactions. The absorption features of H x N y O z , CO x , and HCOOH (formic acid) were identified, and the relative densities were deduced by fitting the absorption bands of the detected molecules. Strong interactions between plasma and polymer (Polyethylene-2,6-naphthalate, or PEN) in precursor-free oxygen-containing gas mixtures were observed as evidenced by a high CO x production. The presence of HCOOH in the gas effluent, formed through plasmachemical synthesis of CO x , turns out to be a sensitive indicator for etching. By adding tetraethylorthosilicate precursor in the plasma, dramatic changes in the CO x production were measured, and two distinct deposition regimes were identified. At high precursor flows, a good agreement with the precursor combustion and the CO x production was observed, whereas at low precursor flows an etching-deposition regime transpires, and the CO x production is dominated by polymer etching. Published by AIP Publishing. [http://dx

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Ozone production and de-NO x modeling in dry air electrical discharges

Cited by 23 publications

References 10 publications

Multiple microdischarge dynamics in dielectric barrier discharges

Multiple microdischarge dynamics in dielectric barrier discharges

Application of Technical Kinetics for Macroscopic Analysis of Ozone Synthesis Process

Infrared gas phase study on plasma-polymer interactions in high-current diffuse dielectric barrier discharge

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