Optimizing Factors on High Concentration of Ozone Production with Dielectric Barrier Discharge

Seok, Dong Chan; Jeong, Hyeon Young; Jung, Young‐Dae; Lho, T.

doi:10.1080/01919512.2014.955909

Cited by 8 publications

(4 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The oxidation of the metal electrode in oxygen containing DBDs was already reported elsewhere . Our initial observation regarding the nanoparticle production in O 2 and CO 2 DBD systems was that deposition rates increase at higher flow rates and in higher power regimes.…”

Section: Discussionsupporting

confidence: 55%

“…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. Furthermore, studies on nanosecond pulsed Surface Dielectric Barrier Discharge (SDBD) development at pressures between 1 and 6 bar in air give evidence for changing discharge dynamics with increasing pressure .…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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

Belov

Paulussen²,

Bogaerts

2017

Plasma Process Polym

View full text Add to dashboard Cite

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.

show abstract

Section: Discussionsupporting

confidence: 55%

Section: Introductionmentioning

confidence: 99%

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

Belov

Paulussen²,

Bogaerts

2017

Plasma Process Polym

View full text Add to dashboard Cite

show abstract

“…Furthermore, increasing the gas pressure makes the gas mass flow rate increase indirectly [21]. The decrease in ozone concentration and ozone yield with gas pressure was experimentally confirmed by Boonduang et al [22] and Seok et al [23].…”

Section: Effect Of Gas Pressurementioning

confidence: 82%

Numerical investigation on the effect of gas parameters on ozone generation in pulsed dielectric barrier discharge

Wei¹,

Liang²,

Zhang

2018

Plasma Sci. Technol.

View full text Add to dashboard Cite

Pulsed dielectric barrier discharge is a promising technology for ozone generation and is drawing increasing interest. To overcome the drawback of experimental investigation, a kinetic model is applied to numerically investigate the effect of gas parameters including inlet gas temperature, gas pressure, and gas flow rate on ozone generation using pulsed dielectric barrier discharge. The results show that ozone concentration and ozone yield increase with decreasing inlet gas temperature, gas pressure, and gas flow rate. The highest ozone concentration and ozone yield in oxygen are about 1.8 and 2.5 times higher than those in air, respectively. A very interesting phenomenon is observed: the peak ozone yield occurs at a lower ozone concentration when the inlet gas temperature and gas pressure are higher because of the increasing average gas temperature in the discharge gap as well as the decreasing reduced electric field and electron density in the microdischarge channel. Furthermore, the sensitivity and rate of production analysis based on the specific input energy (SIE) for the four most important species O 3 , O, O(1D), and O 2 (b 1 ∑) are executed to quantitatively understand the effects of every reaction on them, and to determine the contribution of individual reactions to their net production or destruction rates. A reasonable increase in SIE is beneficial to ozone generation. However, excessively high SIE is not favorable for ozone production.

show abstract

“…The position of the OES, having a fixed 10 mm diameter lens (QEPro, Ocean optics inc., Orlando, FL, USA), was 40 mm away from the electrodes. The DBD device that produced high concentrations of active gas was employed for CO 2 plasma-activated gas (PAG) generation, where the operating conditions were optimized with an output power of 800 W at an AC frequency of 30 kHz [20]. To increase the contact area of the powder, a vortex mixer (VM-96A, Lab Companion, Billerica, MA, USA) installed at the bottom was used to stir the power.…”

Section: Methodsmentioning

confidence: 99%

Hydrophilic Surface Treatment of Carbon Powder Using CO2 Plasma Activated Gas

et al. 2021

View full text Add to dashboard Cite

Carbon powders exhibit electrical conductivity that causes the powders to agglomerate due to the applied electrostatic forces and discharges capacitance when used for surface treatments with plasma sources. To avoid this obstacle, a non-direct method is used with active gas that is generated through plasma. This active gas is in contact with the carbon powder so that the hydrophilic characteristics are formed. It is the carboxyl COO− functional group that causes hydrophilic improvement and it is shown to increase in the carbon surface after soft oxidation. The wettability of carbon powder gradually improves with more plasma treatment time. This is shown through a simple water dispersion test. Eventually, the dispersed aqueous solution gradually separates the powder, which either floats or sinks. The sample treated for 60 min is shown to continuously sustain dispersibility in water over a long period of time.

show abstract

Optimizing Factors on High Concentration of Ozone Production with Dielectric Barrier Discharge

Cited by 8 publications

References 22 publications

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

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

Numerical investigation on the effect of gas parameters on ozone generation in pulsed dielectric barrier discharge

Hydrophilic Surface Treatment of Carbon Powder Using CO2 Plasma Activated Gas

Contact Info

Product

Resources

About