Experimental study of ozone synthesis

Garamoon, A. A.; Elakshar, F. F.; Nossair, A. M. A.; Kotp, E.F.

doi:10.1088/0963-0252/11/3/305

Cited by 37 publications

(23 citation statements)

References 16 publications

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“…If the electric field is sufficiently high, it breaks the oxygen molecules into its atoms, the latter then combines with other oxygen molecules to form O 3 . Traditionally, a low-frequency (50 Hz) ac source, coupled with a high turns-ratio transformer, is used as the power supply for the ozone generator [6], [7]. This approach requires high voltage across the chamber, since it must operate close to the discharge potential.…”

mentioning

confidence: 99%

Analysis and Implementation of Transformerless LCL Resonant Power Supply for Ozone Generation

Amjad

Salam

Facta

et al. 2013

IEEE Trans. Power Electron.

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Abstract-This paper describes the analysis and design of an LCL resonant power supply for ozone generation. The main advantage of the proposed topology is the absence of high-voltage transformer; the high voltage gain is achievable by means of doubleresonance phenomena. Furthermore, the bandwidth is wider than the ordinary LC and its phase difference is constant over specific frequency range; as a result, an open-loop operation can be implemented. The complete analysis and design procedure of the power supply is presented. The design procedure is verified by implementing the power supply to drive a dielectric barrier discharge prototype ozone chamber. The hardware results are found to be in close agreement with simulation and thus justify the validity of the design procedures. The proposed circuit is suitable for portable ozone power supply fed by low-voltage source such as battery or photovoltaic module.Index Terms-Dielectric barrier discharge (DBD), full-bridge inverter, high-voltage power supply, LCL resonant circuit, ozone generation.

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confidence: 99%

Analysis and Implementation of Transformerless LCL Resonant Power Supply for Ozone Generation

Amjad

Salam

Facta

et al. 2013

IEEE Trans. Power Electron.

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“…25. The efficacy is calculated by dividing the ozone concentration with the power supplied to the chamber [26]. As can be observed, the efficacy increases with chamber voltage up to a certain (maximum) limit and finally decreases due to saturation.…”

Section: Simulations and Experimental Resultsmentioning

confidence: 99%

“…One method to achieve high ozone concentration, while being able to increase the flow rate, is by increasing the chamber length [26], [27]. By doing so, the gas residence time (the time in which the oxygen remains inside the chamber) increases; it leads to more dissociation of oxygen molecules into atom and, hence, increase in concentration.…”

Section: Introductionmentioning

confidence: 99%

Analysis, Design, and Implementation of Multiple Parallel Ozone Chambers for High Flow Rate

Amjad

Salam

2014

IEEE Trans. Ind. Electron.

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It is well known that ozone concentration depends on air/oxygen input flow rate and power consumed by the ozone chamber. For every chamber, there exists a unique optimum flow rate that results in maximum ozone concentration. If the flow rate is increased (beyond) or decreased (below) from this optimum value, the ozone concentration drops. This paper proposes a technique whereby the concentration can be maintained even if the flow rate increases. The idea is to connect n number of ozone chambers in parallel, with each chamber designed to operate at its optimum point. Aside from delivering high ozone concentration at high flow rate, the proposed system requires only one power supply to drive all these (multiple) chambers simultaneously. In addition, due to its modularity, the system is very flexible, i.e., the number of chambers can be added or removed as demanded by the (output) ozone requirements. This paper outlines the chamber design using mica as dielectric and the determination of its parameters. To verify the concept, three chambers are connected in parallel and driven by a single transformer-less LCL resonant power supply. Moreover, a closed-loop feedback controller is implemented to ensure that the voltage gain remains at the designated value even if the number of chambers is changed or there is a variation in the components. It is shown that the flow rate can be increased linearly with the number of chambers while maintaining a constant ozone concentration.Index Terms-Dielectric barrier discharge (DBD), high-voltage power supply, ozone chamber, ozone concentration, resonant inverter.

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“…In the present work we are attributing the oxidation process of PC surface not only to atomic oxygen but also to ozone molecules. Inside the micro-discharge filaments the energetic electrons react with the oxygen molecules forming excited atomic oxygen [30]: …”

Section: Resultsmentioning

confidence: 99%

Limiting the Migration of Bisphenol A from Polycarbonate Using Dielectric Barrier Discharge

Soliman¹,

Samir²,

Hassan³

et al. 2014

OJSTA

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Dielectric barrier discharge is used as a cheap technique for surface treatment of polycarbonate. The discharge system is working in open air at atmospheric pressure. The treatments are carried out at low discharge powers (1.5 and 2 W) for treatment time (2.5 -15 min). The treated samples show decrease in the contact angle and increase in the crystallinity, thermal stability and surface roughness. The effect of ozone on the increase in the oxygen containing functional groups is discussed. The treatment process shows effective limitation of the migration of bisphenol A from the surface of polycarbonate due to the cross linking. Zero migration of bisphenole A is recorded as the sample is treated for 7.5 min. The treatment process is found to be very efficient with very low cost.

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Experimental study of ozone synthesis

Cited by 37 publications

References 16 publications

Analysis and Implementation of Transformerless LCL Resonant Power Supply for Ozone Generation

Analysis and Implementation of Transformerless LCL Resonant Power Supply for Ozone Generation

Analysis, Design, and Implementation of Multiple Parallel Ozone Chambers for High Flow Rate

Limiting the Migration of Bisphenol A from Polycarbonate Using Dielectric Barrier Discharge

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