The Effect of SF<sub>6</sub>on Ozone Generation using Dielectric Barrier Discharge

Wei, Linsheng; Hu, Zhaoji; Zhang, Yafang; Yang, Chun

doi:10.1080/01919512.2010.522948

Cited by 7 publications

(4 citation statements)

References 21 publications

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“…The detail of the ozonizer has been described previously (Wei et al 2010(Wei et al , 2013. The experimental schematic is shown in Figure 1a.…”

Section: Methodsmentioning

confidence: 99%

“…In order to enhance the ozone production efficiency to meet the increasing demand of ozone, effective means are therefore urgently demanded to improve ozone yield and meanwhile to reduce energy consumption. The influence of some gas additives on ozone production has been investigated, such as inert gas (Chen et al 2010a,b;Manning 2000;Wei et al 2012Wei et al , 2013, N 2 (Manning and Hedden 2001;Mason et al 2002;Peyrous et al 1999;Pontiga and Castellanos 2005), CO 2 , H 2 O (Chen and Wang 2005), NOx Stefanovic et al 2001), halomethane (Skalny et al 1999;, SF 6 (Novoselov et al 1999;Wei et al 2010) and so on. It can be concluded, although it has been reported that using inert gases as the additives has been demonstrated to be an ineffective approach to increase ozone production efficiency, the investigation is interesting and worth further investigation.…”

Section: Introductionmentioning

confidence: 98%

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The Influence of Inert Gas Addition on Electric Breakdown Utilizing Dielectric Barrier Discharge in Ozone Generation in Air

Wei

Yuan

Zhang

et al. 2014

Ozone: Science & Engineering

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This article investigates the effect of inert gas additionHe, Ar, Kr, and Xe on gas breakdown voltage within a dielectric barrier discharge reactor with air feed gas. The density-normalized effective ionization coefficients α eff N are calculated for inert gas/air mixtures; the critical reduced field E/N cr is then obtained where the electron ionization exactly balances the attachment. Adding inert gases would lead to the decreasing critical reduced field strength E/N cr due to the enhancement of effective ionization coefficient. In addition, inert gas additions have shown to reduce the breakdown voltage. Moreover the calculated breakdown voltage values and the experimental data are plotted for the sake of comparison and results show that calculated results are in agreement with the experimental values. Parametric studies offer substantial insight in plasma physics, as well as in ozone generation applications.

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“…The detail of the ozonizer has been described previously (Wei et al 2010(Wei et al , 2013. The experimental schematic is shown in Figure 1a.…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

The Influence of Inert Gas Addition on Electric Breakdown Utilizing Dielectric Barrier Discharge in Ozone Generation in Air

Wei

Yuan

Zhang

et al. 2014

Ozone: Science & Engineering

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“…[17,18] Given that a reduced discharge gap distance can enhance the electric field and shrink the plasma bulk regime, a high concentration and proportion of energetic electrons can be achieved in sub-millimeter discharges. [17][18][19] In the present study, the discharge characteristics of a sub-millimeter pulsed atmospheric dielectric barrier discharge were investigated experimentally by using electrical and optical diagnostics. The discharge mechanism in terms of electron dynamics was investigated by numerical simulations, in which the discharge ignition and sheath characteristics in terms of the sheath voltage and thickness were presented to discuss the production of energetic electrons in the discharge.…”

Section: Introductionmentioning

confidence: 99%

Electron characteristics and dynamics in sub-millimeter pulsed atmospheric dielectric barrier discharge

Fang 方,

Zhang 张,

Lu 卢

et al. 2024

Chinese Phys. B

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The discharge characteristics and mechanism of sub-millimetre pulsed dielectric barrier discharge in atmospheric-pressure helium are investigated experimentally and theoretically, demonstrating that when the discharge gap distance is reduced from 1.00 mm to 0.20 mm, the discharge ignition time is reduced to approximately 40 ns and discharge intensity is enhanced in terms of the discharge optical emission intensity and density of the plasma species, (energetic electrons with energy above 8.40 eV). The simulated results show that as the discharge gap distance is further reduced to 0.10 mm, the number of energetic electrons decreases, which is attributable to the contraction of plasma bulk regime and reduction of electron density in the discharge bulk. Conversely, the proportion of energetic electrons to the total electrons in the discharge monotonically increases as the discharge gap distance is reduced from 1.00 mm to 0.10 mm. It is proposed that a gap distance of 0.12 mm is optimal to achieve a high concentration and proportion of energetic electrons in sub-millimetre pulsed atmosphere dielectric barrier discharge.

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“…Novoselov et al [7] predicted that a tiny SF 6 additive in air has an active effect on ozone generation using a self-consistent model. Based on the research conclusions, Wei [5] therefore carried out a systematic experimental investigation and concluded that a tiny SF 6 content in air would have a favorable impact on ozone generation and the oxygen source should avoid the presence of SF 6 in air. Therefore, the above-mentioned experimental studies of the electrical breakdown in SF 6 -Air and SF 6 -O 2 mixtures have shown the need for more accurate calculations of parameters required to describe the behavior of an electron swarm.…”

Section: Introductionmentioning

confidence: 99%

Electron Transport Coefficients and Effective Ionization Coefficients in SF₆-O₂and SF₆-Air Mixtures Using Boltzmann Analysis

Wei¹,

Xu²,

Yuan³

et al. 2014

Plasma Sci. Technol.

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The electron drift velocity, electron energy distribution function (EEDF), densitynormalized effective ionization coefficient and density-normalized longitudinal diffusion velocity are calculated in SF6-O2 and SF6-Air mixtures. The experimental results from a pulsed Townsend discharge are plotted for comparison with the numerical results. The reduced field strength varies from 40 Td to 500 Td (1 Townsend=10 −17 V·cm 2 ) and the SF6 concentration ranges from 10% to 100%. A Boltzmann equation associated with the two-term spherical harmonic expansion approximation is utilized to gain the swarm parameters in steady-state Townsend. Results show that the accuracy of the Boltzmann solution with a two-term expansion in calculating the electron drift velocity, electron energy distribution function, and density-normalized effective ionization coefficient is acceptable. The effective ionization coefficient presents a distinct relationship with the SF6 content in the mixtures. Moreover, the E/Ncr values in SF6-Air mixtures are higher than those in SF6-O2 mixtures and the calculated value E/Ncr in SF6-O2 and SF6-Air mixtures is lower than the measured value in SF6-N2. Parametric studies conducted on these parameters using the Boltzmann analysis offer substantial insight into the plasma physics, as well as a basis to explore the ozone generation process.

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The Effect of SF₆on Ozone Generation using Dielectric Barrier Discharge

Cited by 7 publications

References 21 publications

The Influence of Inert Gas Addition on Electric Breakdown Utilizing Dielectric Barrier Discharge in Ozone Generation in Air

The Influence of Inert Gas Addition on Electric Breakdown Utilizing Dielectric Barrier Discharge in Ozone Generation in Air

Electron characteristics and dynamics in sub-millimeter pulsed atmospheric dielectric barrier discharge

Electron Transport Coefficients and Effective Ionization Coefficients in SF₆-O₂and SF₆-Air Mixtures Using Boltzmann Analysis

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The Effect of SF6on Ozone Generation using Dielectric Barrier Discharge

Cited by 7 publications

References 21 publications

The Influence of Inert Gas Addition on Electric Breakdown Utilizing Dielectric Barrier Discharge in Ozone Generation in Air

The Influence of Inert Gas Addition on Electric Breakdown Utilizing Dielectric Barrier Discharge in Ozone Generation in Air

Electron characteristics and dynamics in sub-millimeter pulsed atmospheric dielectric barrier discharge

Electron Transport Coefficients and Effective Ionization Coefficients in SF6-O2and SF6-Air Mixtures Using Boltzmann Analysis

Contact Info

Product

Resources

About

The Effect of SF₆on Ozone Generation using Dielectric Barrier Discharge

Electron Transport Coefficients and Effective Ionization Coefficients in SF₆-O₂and SF₆-Air Mixtures Using Boltzmann Analysis