Effect of Oxygen Pressure and Flow Rate on Electrical Characteristic and Ozone Concentration of a Cylinder-Cylinder DBD Ozone Generator

Boonduang, S.; Limsuwan, Supanee; Kongsri, W.; Limsuwan, Pichet

doi:10.1016/j.proeng.2012.02.035

Cited by 25 publications

(8 citation statements)

References 11 publications

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“…With less reaction time, less ozone is formed [17]. The same trend was also reported by Boonduang et al [16]. They reported that the optimum ozone concentration was obtained by using a gas flow rate of 2 L min -1 .…”

Section: Influence Of Gas Flow Rate On the Solubility Of Ozonesupporting

confidence: 79%

Mass Transfer Coefficient of Ozone in a Bubble Column

et al. 2018

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Abstract. The effect of flow rate of ozone-containing gas and pH on the mass transfer coefficient of ozone through water in a bubble column reactor has been studied. Ozone was generated from air using a corona discharge ozone generator. The flow rate of air was varied from 2 to 5 L min -1 , while pH was varied from 4 to 10. The gas containing ozone was bubbled to the reactor containing 1.5 L of 2% KI solution. The temperature was set at 281C. The concentration of ozone was determined using titrimetric method every 5 minutes. The results show that the concentration of ozone increases with time, and it reaches a steady-state concentration after 30 minutes of ozonation. The gas flow rate and pH apparently affect both the concentration and the kLa. The highest kLa of 2.1 10 -2 s -1 is obtained at pH 4 with a gas flow rate of 4 L min -1 .

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Section: Influence Of Gas Flow Rate On the Solubility Of Ozonesupporting

confidence: 79%

Mass Transfer Coefficient of Ozone in a Bubble Column

et al. 2018

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“…Then ozone can decompose quickly to produce oxygen and leave no residue in food [6]. Various countries have allowed the use of Ozone for the treatment of food with certain standards The US Food and Drug Administration (FDA) has approved ozone treatment for food storage in gas and liquid phases [1][2][4][5] One technique to produce ozone is to use Dielectric Barrier Discharge (DBD) by utilizing high voltage [7,8]. DHF is an ozone generator reactor by utilizing plasma discharges which is generated in the gap between the two electrodes ie the wire electrode as the inner electrode and the outer electrode as the passive electrode using the aluminum sheet with a pyrex glass tube as a dielectric material in order to avoid arc discharges.…”

Section: Introductionmentioning

confidence: 99%

Determination of ozone distribution in fish cold storage dedicated plasma ozone technology

et al. 2018

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Research on the distribution of ozone in a cold storage has been done. This cold storage is equipped with an ozone piping system. Ozone inserts to the cold storage was generated by dielectric barrier discharge plasma. The reactor is made of two stainless steel mesh wire cylindrical electrodes and a barried by a pyrex tube. The pipes are hollowed so that ozone can be distributed into cold storage. The distribution of ozone in cold storage is determined by placing a petri dish in twenty-four different points. Ozone that inserted to storage (10 cubic meters) with a capacity of 40 grams/hour. The inserting of ozone into cold storage was done with four different lengths of time wich are 30, 60, 90, and 120 minutes. Ozone distribution in storage was almost the same at each measurement points. The most influential in the distribution is the time. We found that the distribution of ozone into storage with average ozone concentration of 4.3, 6.3, 4.6, and 4.0 ppm with time 30, 60, 90, 120 minutes respectively. Futhermore, we also dissolve the ozone into the water in the tank in the same storage with temperature (2-8)0C. We found that the concentration of dissolved ozone in the water without samples was always greater than that of the existing fish and shrimp samples, with various dissolution times between (30-120) minutes at 30 minutes intervals. Cold storage dedicated ozone was used to store fish used to store tuna, milkfish and shrimp. With ozone immersion of fish in ozone-soluble water can maintain fish quality for 16 days.

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“…The effect of pressure variations between 1 and 3 bar on process efficiency was mainly studied for the production of ozone – the most industrialized application of DBD reactors . In recent works, Yuan et al and Seok et al demonstrated the existence of an optimal pressure for the ozone synthesis at 1.4 bar for air‐fed and 1.5–2 bar for oxygen‐fed systems.…”

Section: Introductionmentioning

confidence: 99%

Pressure as an additional control handle for non-thermal atmospheric plasma processes

Belov

Paulussen²,

Bogaerts

2017

Plasma Process Polym

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O 2 and CO 2 Dielectric Barrier Discharges (DBD) were studied at elevated (i.e., above atmospheric) pressure regimes (1-3.5 bar). It was demonstrated that these operational conditions significantly influence both the discharge dynamics and the process efficiencies of O 2 and CO 2 discharges. For the case of the O 2 DBD, the pressure rise results in the amplification of the discharge current, the appearance of emission lines of the metal electrode material (Fe, Cr, Ni) in the optical emission spectrum and the formation of a granular film of the erosion products (10-300 nm iron oxide nanoparticles) on the reactor walls. Somewhat similar behavior was observed also for the CO 2 DBD. The discharge current, the relative intensity of the CO Angstrom band measured by Optical Emission Spectroscopy (OES) and the CO 2 conversion rates could be stimulated to some extent by the rise in pressure. The optimal conditions for the O 2 DBD (P = 2 bar) and the CO 2 DBD (P = 1.5 bar) are demonstrated. It can be argued that the dynamics of the microdischarges (MD) define the underlying process of this behavior. It could be demonstrated that the pressure increase stimulates the formation of more intensive but fewer MDs. In this way, the operating pressure can represent an additional tool to manipulate the properties of the MDs in a DBD, and as a result also the discharge performance.

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Effect of Oxygen Pressure and Flow Rate on Electrical Characteristic and Ozone Concentration of a Cylinder-Cylinder DBD Ozone Generator

Cited by 25 publications

References 11 publications

Mass Transfer Coefficient of Ozone in a Bubble Column

Mass Transfer Coefficient of Ozone in a Bubble Column

Determination of ozone distribution in fish cold storage dedicated plasma ozone technology

Pressure as an additional control handle for non-thermal atmospheric plasma processes

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