SO/sub 2/ and CO gas removal and discharge characteristics of a nonthermal plasma reactor in a crossed DC magnetic field

Moon, Jae-Duk; Lee, Geun-Taek; Chung, Suk-Hwan

doi:10.1109/28.793385

Cited by 28 publications

(7 citation statements)

References 8 publications

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“…The electron E × B drift velocity v is calculated to be about 1 × 10 7 m/s based on Equation (3), which is significantly higher than v ⊥ , indicating that electron E × B drift motion dominates the electron motion process. This conclusion was also reported by Jiang et al [22] According to the studies of Moon et al [21] and Park et al, [30] it is believed that electron E × B drift motion plays an important role in improving the degradation efficiency of harmful gases after applying the magnetic field to discharge at atmospheric pressure.…”

Section: Effect Of Magnetic Field On Discharge Characteristic and Opt...supporting

confidence: 71%

“…In addition to rotating around the magnetic field lines as they would in a parallel magnetic field, there is an E B × drift motion of electrons when the perpendicular magnetic field is applied. [20,21] Besides, an enlarged domain of plasma can be achieved when the E B × drift motion is in the same direction as the gas flow in plasma jets and gliding arc discharge. [22,23] Liu et al investigated the effect of parallel magnetic field on plate-plate DBD; they found that the intensity and uniformity of the discharge were improved simultaneously with the parallel magnetic field.…”

Section: Introductionmentioning

confidence: 99%

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Promoting volatile organic compounds removal by a magnetically assisted nanosecond pulsed gear‐cylinder dielectric barrier discharge

Jiang

Sun

Peng

et al. 2021

Plasma Processes & Polymers

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In this study, a magnetic field perpendicular to the electric field is introduced to the gear-cylinder dielectric barrier discharge (DBD) to enhance the plasma density and improve the volatile organic compounds removal performance at atmospheric pressure. Higher discharge intensity, enlarged plasma streamers region, and better toluene removal performance are obtained after introducing a 0.2 T magnetic field

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Section: Effect Of Magnetic Field On Discharge Characteristic and Opt...supporting

confidence: 71%

Section: Introductionmentioning

confidence: 99%

Promoting volatile organic compounds removal by a magnetically assisted nanosecond pulsed gear‐cylinder dielectric barrier discharge

Jiang

Sun

Peng

et al. 2021

Plasma Processes & Polymers

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“…The above studies have not considered the influences of external magnetic fields, which are very common in plasma experiments and applications. In corona discharge, researchers used a magnetic field to enhance the discharge current and control the plasma [66][67][68]. The study of a collisional sheath structure with nonextensive electrons becomes more complicated when considering the magnetic field magnetization effect.…”

Section: Introductionmentioning

confidence: 99%

Modeling of magnetized collisional plasma sheath with nonextensive electron distribution and ionization source

Chen¹,

Yang²,

An³

et al. 2023

Plasma Sci. Technol.

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The properties of atmospheric pressure collisional plasma sheath with non-extensively distributed electrons and hypothetical ionization source terms are studied in this work. The Bohm criterion for the magnetized plasma was extended in the presence of an ion-neutral collisional force and ionization source. The effects of electron non-extensive distribution, ionization frequency, ionneutral collision, magnetic field angle and ion temperature on the Bohm criterion of the plasma sheath are numerically analyzed. The fluid equations are solved numerically in the plasma-wall transition region using a modified Bohm criterion as the boundary condition. The plasma sheath properties such as charged particle density, floating sheath potential and thickness are thoroughly investigated under different kinds of ion source terms, the contributions of collisions, and magnetic fields. The results show that the effect of the ion source term on the properties of atmospheric pressure collisional plasma sheath is significant. As the ionization frequency increases, the Mach number of Bohm criterion decreases and the range of possible values narrows. When the ion source is considered, the space charge density increases, the sheath potential drops more rapidly, and the sheath thickness becomes narrower. In addition, ion-neutral collision, magnetic field angle and ion temperature also significantly affect the sheath potential profile and sheath thickness.

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“…It is generally believed that introducing a magnetic field into a nonthermal plasma has been shown to enhance discharge intensity, increase plasma density, as well as improve the plasma chemical activity when the cyclotron frequency of electrons is comparable to the collision frequency between neutral gas molecules and electrons at atmospheric pressure [22,23]. Recently, several research works have focused on the effect that a magnetic field has on plasma for practical applications, including surface modification [24], electrostatic precipitators [25], ozone production [26], gaseous pollutant purification [27,28], etc. On this basis, we propose the application of magnetic-assisted DC-NPSD for the generation of plasma with high-energy efficiency and high amounts of active substances, and study the influence of magnetic field and DC superimposed pulse on discharge from the perspective of streamer propagation.…”

Section: Introductionmentioning

confidence: 99%

Physical and chemical properties of a magnetic-assisted DC superimposed nanosecond-pulsed streamer discharge plasma

Jiang¹,

Lü²,

Peng³

et al. 2021

J. Phys. D: Appl. Phys.

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In the present work, a magnetic-assisted DC superimposed nanosecond-pulsed streamer discharge (DC-NPSD) with a 0.4 T parallel magnetic field is developed that achieves good performance for ozone production and toluene degradation. The influence of the assisted parallel magnetic field on the electrical characteristics, streamer propagation behavior, reactive species generation and plasma chemical properties of the DC-NPSD are systematically investigated. The experimental results indicate that better impedance matching of a nanosecond pulsed power supply and a discharge reactor can be realized by superimposing DC voltage (U DC), which facilitates reactive species production and toluene degradation. The discharge current, input energy and reactive species production can be further enhanced by the application of a parallel magnetic field under different pulse and DC voltage conditions. There are two distinct streamer phases in the DC-NPSD: a primary streamer (PS) with longer propagation distance and higher propagation velocity and a secondary streamer (SS) with shorter propagation distance and lower propagation velocity. The propagation velocities of both the PS and the SS increase with increasing U DC. Only PS propagation velocity is accelerated by a parallel magnetic field; however, that of the SS remains almost constant with or without a magnetic field. Both ozone generation and toluene degradation performance are improved by a magnetic field, which is attributed to the lengthened electron motion path under the action of Lorentz force and the constraint effect on energetic electrons in the presence of a parallel magnetic field.

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SO/sub 2/ and CO gas removal and discharge characteristics of a nonthermal plasma reactor in a crossed DC magnetic field

Cited by 28 publications

References 8 publications

Promoting volatile organic compounds removal by a magnetically assisted nanosecond pulsed gear‐cylinder dielectric barrier discharge

Promoting volatile organic compounds removal by a magnetically assisted nanosecond pulsed gear‐cylinder dielectric barrier discharge

Modeling of magnetized collisional plasma sheath with nonextensive electron distribution and ionization source

Physical and chemical properties of a magnetic-assisted DC superimposed nanosecond-pulsed streamer discharge plasma

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