• Title, Summary, Keyword: dielectric barrier corona discharge

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Corona Discharge and Ozone Generation Characteristics of a Slit Dielectric Barrier Discharge Type Plasma Reactor with a Third Electrode (3전극이 부설된 틈새 장벽방전형 플라즈마장치의 코로나 방전 및 오존발생 특성)

  • Moon, Jae-Duk;Jung, Jae-Seung
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.56 no.3
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    • pp.583-587
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    • 2007
  • Corona discharge and ozone generation characteristics of a slit dielectric barrier discharge type wire-plate plasma reactor with a third electrode have been investigated. When a third electrode is installed on a slit of the slit barrier, where an intense corona discharge occurs, it is found that a significantly increased ozone output could be obtained. This, however, indicates that the third electrode can activate the corona discharges both of the discharge wire and the slit of the slit barrier in the plasma reactor. As a result, a thin stainless wire, used as the third electrode has a strong effect to influence the corona discharge of the slit and corona wire, especially to the negative corona discharge. Higher amounts of the output ozone and ozone yield, about 1.27 and 1.29 times for the negative corona discharge, can be obtained with the third electrode, which reveals the effectiveness of the third electrode.

Surface Discharge Characteristics of a DC Corona Charged Ferroelectric Pellet Barrier (직류 코로나 하전된 강유전체구 층의 연면방전특성)

  • Geum, Sang-Taek;Lee, Geun-Taek;Mun, Jae-Deok
    • The Transactions of the Korean Institute of Electrical Engineers C
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    • v.48 no.5
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    • pp.385-390
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    • 1999
  • Surface corona discharge characteristics of a dc corona charged ferroelectric pellet barrier have been investigated experimentally. Electric charges stored on the surfaces of the ferroelectric pellets by a dc corona discharge provide partial electric fields on the surfaces of the ferroelectric pellets, which could generate surface corona discharges on the ferroelectric pellets. This system utilizes both the surface discharges on the ferroelectric pellet barrier and the corona discharge between corona tip and mesh electrode. Positive and negative dc voltages were applied to the tip to generate partial discharges, and corona currents were estimated to investigate the buildup charge on ferroelectric pellets as a function of the applied time and the charge relaxation time constants of ferroelectric pellets. As a result, in the case of the negative corona discharge with the ferroelectric pellet barrier, the mean corona current and ozone generation increase greatly, and the surface discharges on the ferroelectric pellets can be fenerated efficiently. It is also found that, charge relaxation time, dielectric constants offerroelectric pellets, polarity of applied voltage and applied time affected to the surface discharges among the ferroelectric pellets.

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Discharge and Ozone Generation Characteristics of a Wire-Plate Discharge System with a Slit Barrier (슬릿 유전체 장벽을 갖는 선대 평판형 방전장치의 방전 및 오존 발생특성)

  • Moon Jae-Duk;Jung Jae-Seung
    • The Transactions of the Korean Institute of Electrical Engineers C
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    • v.54 no.9
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    • pp.421-426
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    • 2005
  • A wire-plate discharge system with a slit barrier has been proposed and investigated experimentally by focusing on the discharges on the slit barrier and ozone generation characteristics. This wire-plate discharge system with a slit barrier can generate an intensive corona discharges, and produce corona discharge twice, once from the corona wire electrode and second time from the surface and the slits of the slit dielectric barrier. As a result this propose wire-plate discharge system with the slit barrier can produce greatly increased ozone than without the slit barrier. This type of wire-plate discharge system with the slit barrier could be used for effective ozone generation as a means with retard to the removal of pollutant gas

Effective Ozone Generation Utilizing a Slit Barrier (틈새 장벽을 이용한 효과적인 오존 발생)

  • Moon, Jae-Duk;Jung, Jae-Seung
    • The Transactions of the Korean Institute of Electrical Engineers C
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    • v.55 no.6
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    • pp.323-327
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    • 2006
  • In this paper a new wire-wire discharge system with a slit dielectric harrier has been proposed, and, its corona discharge and ozone generation characteristics have been investigated experimentally. When the slit mica barrier is installed between corona wires, instead of the grounded plate electrode, a significant increase in the generation of ozone, about 2.2 times higher than that of the conventional ones without the slit harrier, could be obtained. Photographs show that this type of discharge system with a slit barrier was found to produce a corona discharge twice, once from the upper and bottom corona wires, and. again from both sides of surfaces and slits of the slit barrier. As a result, the proposed discharge system has the potential to increase significantly ozone production and it may be useful as an effective means for removing pollutant gases.

XPS Analysis of PVDF Film Treated by Corona Discharge in Ethyl Methacrylate Vapor Atmosphere (에틸메타크릴레이트 증기 분위기에서 코로나 방전 처리한 PVDF 필름의 XPS 분석)

  • Moon, HuiKwon;Seomoon, Kyu
    • Applied Chemistry for Engineering
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    • v.27 no.6
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    • pp.627-632
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    • 2016
  • Ethyl methacrylate (EMA) monomer coupling onto the polyvinylidene fluoride (PVDF) film surface was attempted to enhance the interfacial adhesive force between PVDF-polyvinyl chloride (PVC) bilayer films via dielectric barrier corona discharge. The interfacial forces were quite enhanced when PVDF films were treated by corona discharge in an EMA 1% atmosphere. The contact angle of PVDF films decreased due to corona treatment. X-ray photoelectron spectroscopy (XPS) analysis showed that the carbon and oxygen content of the PVDF film surface increased with corona discharge while the fluoride content decreased. The curve fitting of XPS $C_{1s}$ peaks revealed that the non-polar C-C bonded carbon and oxygen-bonded carbon increased gradually with corona treatment, while the fluorine-bonded carbon decreased.

Silent Discharge Characteristics of $CO_2$ for Alumina Imbedded-Discharge Reacted (알루미나 반응기에서의 이산화탄소의 무성방전 특성)

  • 조문수;곽동주
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • pp.1061-1064
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    • 2001
  • Deep Interests have been paid on the application of non-thermal plasma technique to solve the environmental pollution problems. $CO_2$, is one of the severe pollutants which cause the acid rain and global warming. In this study, in order to improve the conversion efficiency of $CO_2$, the streamer corona discharge plasma and barrier discharge plasma reactors were made, and the conversion characteristics of $CO_2$by the corona discharge plasma and some discharge characteristics of these discharge chambers are studied experimentally.

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Study of the Increase of Conversion Efficiency of $CO_2$ by Discharge Plasmas (방전 플라즈마에 의한 이산화탄소 전환 효율 상승에 관한 연구)

  • Cho, Moon-Soo;Kwak, Dong-Joo
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • pp.904-907
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    • 2002
  • In this study, the plasma-assisted $CO_2$ conversion characteristics were investigated in the streamer corona discharge and silent discharge reactors with dielectric of $Al_2O_3$, to improve the conversion efficiency $CO_2$. Some discharge characteristics of $CO_2$ as parameters of gap spacing and applied voltage frequency, in both corona and silent discharge reactor were also obtained. The maximum $CO_2$ conversion rate was 10.1 [%] under the 5.2 [W] of discharge power and 250 [Hz] of applied voltage frequency.

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Air/Quartz Dielectric Double Barrier Pulse Discharge (공기/석영관(空氣/石英管) 복합유전체(複合誘電體)장벽층(障壁層)의 고주파(高周波) 펄스 방전(放電) 특성(特性))

  • Lee, Eung-Gwan;Woo, Jung-Uk;Chung, Suk-Hwan;Lee, Dong-Hoon;Moon, Jae-Duk
    • Proceedings of the KIEE Conference
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    • pp.1556-1558
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    • 1994
  • An air/quartz dielectric double barrier pulse discharge has been investigated to develop a novel si lent type ozone generator. It is found that there are very active pulsed coronas occurred in the airgap which are very useful for ozone generation. And, the corona onset voltage of the airgap of the air/quartz double barrier was enfluenced greatly by the airgap of the air/quartz dielectric double barrier, and depended greatly upon the airgap ranged of $0.0{\sim}3.0mm$ and by the quartz tube thickness ranged of $1.75{\sim}2.25mm$.

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A Study on Combined Processes of Sliding Arc Plasma and Corona Dielectric Barrier Discharge for Improve the Efficiency Treatment of Harmful Substance (슬라이딩아크 방전과 코로나 방전의 복합공정을 통한 유해물질 처리효율 개선에 관한 연구)

  • Kwon, Woo-Taeg;Lee, Woo-Sik
    • Fire Science and Engineering
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    • v.28 no.6
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    • pp.108-113
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    • 2014
  • The combined process of Sliding Arc Plasma and corona dielectric barrier discharge process (CDBD) was used to efficiently improve harmful substance, which convert into OH radicals which have strong oxidation potential, and so have deodorization and sterilizing effects, by generating specific radicals and anion and then reacting with the moisture contained in harmful substance. As a result of experiment, even if the size of SAP reactor is reduced from 80 A to 50 A, there is no much change and therefore it is judged the size of reactor may be minimized. And it was confirmed that after the anion and ozone generated from CDBD rector react with harmful substance, a anion was reduced from 510,000 ppb to 470 ppb and ozone from 98 ppb to 22 ppb. It was also judged the stability and durability of plasma producer are excellent. Accordingly, it is considered the harmful substances which exist in indoor air quality will be efficiently improved and removed by using further plasma combined process through this study.

A Study on ther Water Plasma Chemical Process Discharge by Pulse Power Supply (펄스전원을 이용한 수중플라즈마 방전에 관한 연구)

  • Shin, Wan-Ho;Hong, Won-Seok;Yoo, Hyo-Yol;Park, Sun-Soon;Choi, Jae-Ho
    • Proceedings of the KIEE Conference
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    • pp.2179-2181
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    • 2005
  • An experimental study on the water plasma characteristics of removal efficiency for organic contaminants in dye waste water has been investigated. In this study, dielectric barrier discharging electrodes with round shape have disposed cross each other in reactor, and pulse power was supplied to between each electrodes. Its output pulse voltage range is from 0[V] to 30[kV] and output frequency range is from 100[Hz] to 2[kHz]. Using proposed system, High frequency discharge is tested in the mixed Tone(air and water) and the space distribution of streamer corona plasma is observed. In spite of the increasement of voltage and frequency, the proposed system have a stable operation characteristics. It is verified by the experimental results.

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