Interactive Phenomena of a Rotating Arc and a Premixed CH4 Flame

Hwang, Nakyung; Lee, Jongguen; Lee, Dae Hoon; Song, Young‐Hoon

doi:10.1007/s11090-012-9349-0

Cited by 18 publications

(4 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…One type of plasma source that has been extensively studied is the gliding arc (GA) which shows characteristics of both thermal and non-thermal discharges. Gliding arc systems have been studied mainly for the treatment of pollutant gases [1][2][3][4][5][6][7] and assisted combustion [8,9], but also for the degradation of pollutants present in liquids [10][11][12], and in other applications such as sterilization [13]. Gliding arc discharges have the advantages of low electrode degradation, moderate translational temperatures (800-2100 K) and vibrational temperatures (2000-3000 K), and electron temperatures near 10 000 K [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Characterization of a rotating gliding arc in argon at atmospheric pressure

McNall¹,

Coulombe²

2018

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

The dynamics of a low-power (<40 W) rotating gliding arc in atmospheric pressure argon sustained by a homemade dual DC power supply between a conical cathode and a grounded sleeve anode and forced into motion by the combined action of a vortex gas flow (<26.3 SLPM) and axial magnetic field (~0.043–0.122 T) was studied. High-speed imaging and electrical diagnostics were used to gain an understanding of the projected arc length, position of the attachment point on the central cathode, and frequency of arc rotation. The electrical signals revealed a glow-type mode of operation, which characteristically low current and high voltage. The square root dependency of the rotating arc frequency on the applied current predicted by a simplified model considering the gas vortex drag and Lorentz forces was confirmed with measurements. Rotation frequencies in the ~100–300 Hz range with average projected arc lengths of 4–8 mm creating a large stabilized reactive volume were obtained. We further demonstrated that the Lorentz force acting on the rotating gliding arc is equivalent to the hydrodynamic drag caused by an argon flow rate of ~8 SLPM for this device configuration.

show abstract

Section: Introductionmentioning

confidence: 99%

Characterization of a rotating gliding arc in argon at atmospheric pressure

McNall¹,

Coulombe²

2018

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

show abstract

“…Discharge considerably extends the range of equivalence ratios which allow the oxidation process to sustain [6,9,42,62,66]. Thus, in the plasmatron presented in Fig.…”

Section: Plasma-assisted Combustion and Hydrocarbon Conversionmentioning

confidence: 97%

Low-current discharge plasma jets in a gas flow. Application of plasma jets

Korolev

2015

Russ J Gen Chem

View full text Add to dashboard Cite

The paper describes the results of investigations of low-current discharges in a gas flow at atmospheric pressure. The primary focus is on glow discharges in coaxial plasmatrons and the so-called gliding arc. Such discharges are typically used for obtaining a plasma jet at the exit of the electrode system. The jet contains active chemical species playing an important role in various applications of the discharge. Plasmaassisted combustion and oxidation of hydrocarbon fuels is also considered. Besides, the applications of plasma jet for modification of surfaces and for use in biology and medicine are discussed.

show abstract

“…In addition, the arc can be forced to rotate by the action of an external magnetic field through the Lorentz force [33,35]. The RGA provides a homogeneous distribution of active species in the plasma zone [35,36].…”

Section: Introductionmentioning

confidence: 99%

Influence of Operating Parameters on Plasma-Assisted Dry Reforming of Methane in a Rotating Gliding Arc Reactor

Martin-del-Campo

Coulombe

Kopyscinski

2020

Plasma Chem Plasma Process

View full text Add to dashboard Cite

The environmental impact of greenhouse gases such as carbon dioxide and methane can be reduced if they are used as feedstock to synthesize chemical building blocks such as syngas (CO, H 2) via dry reforming. Methane dry reforming is investigated using an Ar/CO2/CH4 rotating gliding arc (RGA) reactor powered by a dual-stage pulsed DC power supply. Tangential gas injection combined with a static magnetic field enabled the rotation and upward displacement of the arc along the conical cathode and the grounded anode, yielding to a larger plasma volume. Different parameters such as peak arc current (0.74 and 1.50 A), total gas flow rate (3.7, 4.7 and 6.7 SLPM), CO2/CH4 ratio (1.0, 1.5, 2.0) and gas inlet preheating (room temperature, 200 °C) were studied to determine the most efficient parameter combination. Gas conversion was measured online using a calibrated mass spectrometer and offline using a gas chromatograph. Noticeable increases in CO2 and CH4 conversions, as well as H2 and CO yields, were obtained when doubling the peak arc current. For the larger peak current, higher H2 yields were obtained at a CO2/CH4=1.0, and the best energy efficiencies were obtained at the lowest specific energy input values. No significant effect of the gas inlet temperature on the conversions or yields was found. Trace amounts of acetylene and ethylene, as well as some carbon deposits were observed as by-products of syngas generation. The low amount of by-products obtained implies a good selectivity for CO and H2, i.e., a cleaner syngas when produced with RGA discharge.

show abstract

Interactive Phenomena of a Rotating Arc and a Premixed CH4 Flame

Cited by 18 publications

References 27 publications

Characterization of a rotating gliding arc in argon at atmospheric pressure

Characterization of a rotating gliding arc in argon at atmospheric pressure

Low-current discharge plasma jets in a gas flow. Application of plasma jets

Influence of Operating Parameters on Plasma-Assisted Dry Reforming of Methane in a Rotating Gliding Arc Reactor

Contact Info

Product

Resources

About