Capillary microplasmas for ozone generation

Hensel, Karol; Machala, Zdenko; Tardiveau, Pierre

doi:10.1051/epjap/2009077

Cited by 16 publications

(9 citation statements)

References 15 publications

(22 reference statements)

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“…Figure 12 shows typical FTIR spectra of the gas byproducts generated during the ozone production in the SDBD reactor at Vpp = 6 kV and different frequencies of 1, 3, , 5, and 10 kHz) in dry air. The main byproducts found in the spectra are N 2 O, N 2 O 5 , and NO 2 , which are similar to those obtained in [56]. The qualitative FTIR spectrometry measurements show that ozone is the dominant reactive species generated in the reactor at all the frequencies.…”

Section: Nitrogen Byproductssupporting

confidence: 76%

Characterization of surface dielectric barrier discharge influenced by intermediate frequency for ozone production

Abdelaziz

Ishijima

Seto

et al. 2016

Plasma Sources Sci. Technol.

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The aim of this study is to investigate the effect of the intermediate frequency (1-10 kHz) of the sinusoidal driving voltage on the characteristics of a developed surface dielectric barrier discharge (SDBD)-based reactor having spikes on its discharge electrode. Moreover, its influence on the production of ozone and nitrogen oxide byproducts is evaluated. The results show that SDBD is operated in the filamentary mode at all the frequencies. Nevertheless, the pulses of the discharge current at high frequencies are much denser and have higher amplitudes than those at low frequencies. The analysis of the power consumed in the reactor shows that a small portion of the input power is dissipated in the dielectric material of SDBD source, whereas the major part of the power is consumed in the plasma discharge. The results of the ozone production show that higher frequencies have a slightly adverse effect on the ozone production at relatively high energy density values, where the ozone concentration is slightly decreased when the frequency is increased at the same energy density. The temperature of the discharge channels and gas is not a crucial factor for the decomposition of ozone in this reactor, while the results of the measurements of nitrogen oxides characteristics 2 indicate that the formation of NO and NO 2 has a significant adverse effect on the production efficiency of ozone due to their oxidation to another nitrogen oxides and their catalytic effect.

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Section: Nitrogen Byproductssupporting

confidence: 76%

Characterization of surface dielectric barrier discharge influenced by intermediate frequency for ozone production

Abdelaziz

Ishijima

Seto

et al. 2016

Plasma Sources Sci. Technol.

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“…For these applications, atmospheric pressure discharges are produced in spatially confined geometries such as microcavities and pores of the considered materials. So far, many studies have been carried out to evaluate the performances of the reactors used [Kim, 2004;Mizuno et al, 1992;Ogata et al, 1999;Ibuka et al, 2001;Blin-Simiand et al, 2005;Hensel et al, 2009]. However, only few works have been performed on the physics of the discharge in complex two-phase media [Ohsawa et al, 2000;Tardiveau et al, 2006;Hensel et al, 2007;Hensel and Tardiveau, 2008;Bhoj and Kushner , 2008].…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical study of the propagation of a discharge in a capillary tube in air at atmospheric pressure

Jánský¹,

Delliou²,

Tholin³

et al. 2011

J. Phys. D: Appl. Phys.

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This paper presents an experimental and numerical study of a pulsed air plasma discharge at atmospheric pressure propagating in a capillary glass tube. In this work, we have compared the discharge structures and the axial propagation velocities of discharges. First, we have studied a needle-to-plane configuration without tube. For applied voltages in the range 7–18 kV, we have observed in experiments and in simulations that a plasma ball starts to develop around the needle tip. Then, for applied voltages less than 14 kV, in experiments, the discharge rapidly splits into several streamer channels with a main axial streamer. In simulations, we have computed only the main axial discharge. For applied voltages higher than 14 kV, in experiments and in simulations, we have observed that the discharge propagates with a cone shape in the gap. For all studied voltages, a good experiment/modelling agreement is obtained on the axial propagation velocity of the discharge, which increases with the applied voltage. Then, we have studied the propagation of discharges inside capillary tubes with radii in the range 37.5–300 µm. In experiments and simulations, we have observed that for small tube radius, the discharge front is quite homogeneous inside the tube and becomes tubular when the tube radius increases. Experimentally, we have observed that the velocity of the discharge reaches a maximum for a tube radius slightly less than 100 µm. We have noted that for a tube radius of 100 µm, the discharge velocity is three to four times higher than the velocity obtained without tube. This clearly shows the influence of the confinement by a capillary tube on the discharge dynamics. In this work, we have only simulated discharges for tube radii in the range 100–300 µm. We have noted that both in experiments and in simulations, the velocity of the discharge in tubes increases linearly with the applied voltage. As the radius of the tube decreases, the discharge velocity derived from the simulations slightly increases but is less than the experimental one. We have noted that the discrepancy on the discharge velocity between experiments and simulations increases as the voltage increases.

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“…2.1.2 System describing equations for electric potential and field calculations: Equations (1), (3), (5) and (7) represent four simultaneous algebraic equations into four unknown charges as expressed in the matrix form (9) at the bottom of next page. The solution of (9) results in the unknown charges q 1 , q 2 , q 3 and q 4 .…”

Section: Boundary Conditionsmentioning

confidence: 99%

“…Non-thermal plasmas (NTP) at atmospheric pressure have many interesting applications including electrostatic precipitators [1][2][3], ozone generation [4][5][6][7], pollution control [8][9][10] and surface treatment [11,12]. More recent applications include flat plasma displays [13] and novel applications in the biology and medical fields [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Two‐dimensional modelling of dielectric barrier discharges using charge simulation technique‐theory against experiment

Wedaa

Abdel‐Salam

Ahmed

et al. 2014

IET Science, Measurement & Technology

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Capillary microplasmas for ozone generation

Cited by 16 publications

References 15 publications

Characterization of surface dielectric barrier discharge influenced by intermediate frequency for ozone production

Characterization of surface dielectric barrier discharge influenced by intermediate frequency for ozone production

Experimental and numerical study of the propagation of a discharge in a capillary tube in air at atmospheric pressure

Two‐dimensional modelling of dielectric barrier discharges using charge simulation technique‐theory against experiment

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