Formation of thermal flow fields and chemical transport in air and water by atmospheric plasma

Shimizu, Tetsuji; Iwafuchi, Yutaka; Gregor, Morfill; Sato, Takehiko

doi:10.1088/1367-2630/13/5/053025

Cited by 71 publications

(54 citation statements)

References 37 publications

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“…We recently reported the effect of a discharge on the flow in the water when a high AC voltage with positive polarity was applied to the metal pin electrode [14]. In the present study, the transport mechanism of chemical species in a dielectric barrier discharge between a metal pin and a water surface in response to application of negative voltage was demonstrated in more detail experimentally and computationally.…”

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confidence: 70%

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Transport Mechanism of Chemical Species in a Pin-water Atmospheric Discharge driven by Negative Voltage

Shimizu

Iwafuchi

Morfill

et al. 2011

J. Photopol. Sci. Technol.

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mentioning

confidence: 70%

“…Non-slip condition on the wall and Neumann condition at the open boundary were given. Intermittent gas flow instead of plasma-induced flow in the air at the top of the electrode was given as the inlet condition [14]. The open boundary and the inlet conditions are for analyzing the flow field without O 3 .…”

Section: Analysis Methodsmentioning

confidence: 99%

Transport Mechanism of Chemical Species in a Pin-water Atmospheric Discharge driven by Negative Voltage

Shimizu

Iwafuchi

Morfill

et al. 2011

J. Photopol. Sci. Technol.

Self Cite

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“…These outcomes may be added to actuality that, as expanding in gap remove intensity of corona discharge diminished, which influence the generation of ozone, chemically active species radicals and hydrogen peroxide Komuro (2012). Moreover according to Shimizu (2011), he dictate that a convection current usually generated due to application of high voltage on the liquid surface, these convection currents causes some eddies and water circulation which in return reduce the thickness of the diffusion layer that improves the rate of dye decolorization. Increasing the gap distance will certainly reduce this effect and hence reduce the rate of dye decolorization.…”

Section: Effect Of Gap Distancementioning

confidence: 99%

Simulation and Experimental Study for Degradation of Organic Dyes Using Dual pin‐to‐plate Corona Discharge Plasma reactors for Industrial Wastewater Treatment

El-Tayeb

El-Shazly

Elkady

et al. 2016

Contrib. Plasma Phys.

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This work researches the possibility of increasing the dye removal efficiency from wastewater using nonthermal plasma. A study for the optimal air gap distance between dual pin and surface of Acid Blue 25 dye solution and thickness of ground plate is carried out using 3D-EM simulator to find maximum electric field intensity at the tip of both pins. The consequences display that the best gap for corona discharge is approximately 5 mm using 15 kV source. In addition, the optimum plate thickness is 0.1 mm. These distance and thickness were mentioned are constant during the study of other factors. Dual pin-to-plate high-voltage corona discharge plasma system is presented to investigation experimentally the gap distance, thickness of ground plate, initial dye concentration, pH solution and conductivity on the amount of Acid Blue 25 dye color removal efficiency from wastewater. There is a large consensus among the simulation and experimental work in the air gap and thickness of ground plate. Where the decolorization for air gap 5 mm is 95.74 at time 35 min compared with 91% and 17% for 1 mm and 20 mm gap distance respectively. Also, the discharge energy at each air gap are calculated. Measurement results for the impact of thickness of an Aluminum ground plate on color removal competence showed color removal efficiencies of 86.3%, 90.78% and 98.06%, after treatment time 15 min for thicknesses of 2, 0.5 and 0.1 mm respectively. The decolorization behavior utilizing dual pin-toplate corona discharge plasma system display 82% pigment evacuation proficiency inside 11min. The complete decolorization was accomplished within 28min for distinctive examined introductory color focuses 5 ppm up to 100 ppm. Likewise, the impacts of conductivity by utilizing diverse salts as AlCl3, CaCl2, KCl and NaCl and with distinctive focuses have been explored. The rising of the solution conductivity leads to the reduction of decolorization efficiency. The decolorization efficiency and discharge energy are calculated at different concentration molarity for AlCl3, CaCl2, KCl and NaCl. It was observed that the presence of salts at the same concentration level substantially decreased the rate and the extent of decolorization. The results indicate that the optimum pH for the decolorization of Acid Blue 25 dye is in the range between 3 and 6. Furthermore the conductivity and discharge energy were measurement at each value of pH. Energy yield for decolorization and Electrical Energy per Order (EE/O) under different initial pH value were calculated. A kinetic model is used to define the performance of corona discharge system under different value of pH. The model of pseudo -zero, pseudo-first order, and pseudo-second order reactions kinetic are utilized to investigate the decolorization of Acid Blue 25 dye. The rate of degradation of Acid Blue 25 dye follows the pseudo-first order kinetics in the dye concentration. Energy consumption requirements for decolorization was considered. The outcomes will be useful for designing the plasma treatment systems ...

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“…We hypothesize that the primary interaction between the plasma jet and the hydrocarbon is partial oxidation at the liquid-air interface as a consequence of exposure to UV/VUV radiation [54] and activated oxygen species such as O 3 and O-radicals [30,[55][56][57][58][59][60][61]. The surface tension of e.g.…”

Section: A Simplified Model For the Plasma-liquid Interactionmentioning

confidence: 99%

“…Mechanisms that can induce flow or surface deformations are stagnation pressure and shear of the gas flow, local temperature increase [30], chemical reactions or electric fields [31][32][33][34]. In this manuscript, we report on the interaction of cold, atmosphericpressure Ar-and air plasma jets with liquid hydrocarbon films on moving substrates.…”

Section: Introductionmentioning

confidence: 99%

Marangoni flows induced by atmospheric-pressure plasma jets

Berendsen¹,

Veldhuizen²,

Kroesen³

et al. 2014

J. Phys. D: Appl. Phys.

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Formation of thermal flow fields and chemical transport in air and water by atmospheric plasma

Cited by 71 publications

References 37 publications

Transport Mechanism of Chemical Species in a Pin-water Atmospheric Discharge driven by Negative Voltage

Transport Mechanism of Chemical Species in a Pin-water Atmospheric Discharge driven by Negative Voltage

Simulation and Experimental Study for Degradation of Organic Dyes Using Dual pin‐to‐plate Corona Discharge Plasma reactors for Industrial Wastewater Treatment

Marangoni flows induced by atmospheric-pressure plasma jets

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