Basic Parameters of Coplanar Discharge Ozone Generator

Murata, Takahiro; Okita, Yuji; Noguchi, M.; Takase, I.

doi:10.1080/01919510490507577

Cited by 30 publications

(15 citation statements)

References 11 publications

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“…In comparison to volume (VD) and surface (SD) barrier discharges, the research focused on CD was not so extensive and driven more by application intents such as ozone production and non-woven fabrics treatment [4][5][6][7][8]. Therefore, systematic basic research (including spectrally and high temporally and spatially resolved measurements) of this discharge type trying to describe and understand the mechanism was missing up to now.…”

Section: Introductionmentioning

confidence: 99%

3D Imaging of the Single Microdischarge Development in Coplanar Barrier Discharges in Synthetic Air at Atmospheric Pressure

Hoder

Šíra

Kozlov

et al. 2009

Contrib. Plasma Phys.

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The evolution of the luminosity of the coplanar barrier discharge in the single-filament mode was studied by the technique of cross-correlation spectroscopy and intensified high-speed CCD camera. For the first time 3D-spatially and temporally resolved investigations of the luminosity of second positive (at 337.1 nm) and first negative (at 391.5 nm) system of molecular nitrogen in this discharge type were realized. Although the coplanar barrier discharge is sometimes referred to as a pure surface discharge, it shows clear 3D structure. From these experimental data, the propagation of the cathode-directed ionizing wave in the space above the gap is clearly seen. Also, a second ionizing wave propagating towards anode later on has been detected, too. The diffuse spots created by impact of ionizing waves onto the dielectrics and their propagation on the dielectric surface is described. The results for the coplanar barrier discharge are compared with corresponding experimental results obtained for the volume barrier discharge and basic similarities are pointed out.

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Section: Introductionmentioning

confidence: 99%

3D Imaging of the Single Microdischarge Development in Coplanar Barrier Discharges in Synthetic Air at Atmospheric Pressure

Hoder

Šíra

Kozlov

et al. 2009

Contrib. Plasma Phys.

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“…The history of the coplanar configuration connected with the PDPs is well described in [8]. Another usage of the coplanar discharge configuration was found in ozonizers [5,9]. While the CD in PDP operates in the glow regime, according to the low value of the product pd (pressure × discharge gap length), in the ozonizers constructed by Pietsch, Gibalov and Murata the discharge operates in the streamer regime (terminology according to [8]).…”

Section: Introductionmentioning

confidence: 99%

Investigation of the coplanar barrier discharge in synthetic air at atmospheric pressure by cross-correlation spectroscopy

Hoder¹,

Šíra²,

Kozlov³

et al. 2008

J. Phys. D: Appl. Phys.

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The barrier discharge in the coplanar arrangement operating in a single-filament mode was studied spectroscopically. The evolution of the discharge luminosity was measured by the technique of cross-correlation spectroscopy. The 1D-spatially and temporally resolved luminosities of the first negative (at 391.5 nm) and the second positive (at 337.1 nm) system of molecular nitrogen were recorded using the above-mentioned technique. A cathode-directed ionizing wave (IW) was clearly seen on the plot for radiation intensity at 337.1 nm. In addition to this, also observed was a wave of the enhanced electric field propagating over the anode. In this paper, the propagation of these waves is described and their velocities are determined. The discharge evolution is divided into three phases-the Townsend phase, the phase of the IWs propagation and the extinction phase. Since the above-mentioned luminosity distributions could be interpreted approximately as the electric field (for 391.5 nm) and the electron density (for 337.1 nm) distribution, the qualitative description of the discharge is made accordingly. All these parameters are compared with similar measurements of the volume discharge. Apart from this, an attempt to determine the reduced electric field is made according to the kinetic model.

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“…This has led to extensive research and development into efficiency improvements of ozone generators [13]. Feed gas composition, gas temperature, cooling systems, and electrode geometry, have all been investigated to maximize ozone production efficacy [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Influence of the On-time on the Ozone Production in Pulsed Dielectric Barrier Discharges

Montazersadgh

Wright

Ren

et al. 2019

Plasma

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Understanding the production mechanisms of ozone and other reactive species in atmospheric pressure dielectric barrier discharges (DBDs) has become increasingly important for the optimization and commercial success of these plasma devices in emerging applications, such as plasma medicine, plasma agriculture, and plasma catalysis. In many of these applications, input power modulation is exploited as a means to maintain a low gas temperature. Although the chemical pathways leading to ozone production/destruction and their strong temperature dependence are relatively well understood, the effect of the on-time duration on the performance of these modulated DBDs remains largely unexplored. In this study, we use electrical and optical diagnostics, as well as computational methods, to assess the performance of a modulated DBD device. The well-established Lissajous method for measuring the power delivered to the discharge is not suitable for modulated DBDs because the transients generated at the beginning of each pulse become increasingly important in short on-time modulated plasmas. It is shown that for the same input power and modulation duty-cycle, shorter on-time pulses result in significantly enhanced ozone production, despite their operation at slightly higher temperatures. The key underpinning mechanism that causes this counter-intuitive observation is the more efficient net generation rate of ozone during the plasma on-time due to the lower accumulation of NO2 in the discharge volume.

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Basic Parameters of Coplanar Discharge Ozone Generator

Cited by 30 publications

References 11 publications

3D Imaging of the Single Microdischarge Development in Coplanar Barrier Discharges in Synthetic Air at Atmospheric Pressure

3D Imaging of the Single Microdischarge Development in Coplanar Barrier Discharges in Synthetic Air at Atmospheric Pressure

Investigation of the coplanar barrier discharge in synthetic air at atmospheric pressure by cross-correlation spectroscopy

Influence of the On-time on the Ozone Production in Pulsed Dielectric Barrier Discharges

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