Dilute Methane Treatment by Atmospheric Pressure Dielectric Barrier Discharge: Effects of Water Vapor

Mfopara, Ange; Kirkpatrick, Mike; Odic, Emmanuel

doi:10.1007/s11090-008-9164-9

Cited by 26 publications

(15 citation statements)

References 17 publications

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“…We would also note that the deposits in our experiments were observed in the solid state only, however, similar experiments [50][51][52][53] also discuss an observation of viscous liquid deposit for higher initial CH 4 content in nitrogen plasma. Because of this there is a need for deeper investigation of influence of CH 4 content in N 2 on the phase of formed deposits.…”

Section: And N 2 Dissociation Excitation and Ionizationsupporting

confidence: 75%

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Packed Bed DBD Discharge Experiments in Admixtures of N2 and CH4

Horváth

Mason

Polachova

et al. 2010

Plasma Chem Plasma Process

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The physical, chemical and electrical properties of a coaxial Dielectric Barrier Discharge (DBD) fed by various mixtures of N 2 and CH 4 at atmospheric pressure and ambient temperature has been studied. FTIR spectral measurements of the products formed in the discharge have shown that the main chemical products are C 2 H 2, HCN and C 2 H 6 produced by dissociation of CH 4 , with small but significant traces of NH 3 .such a chemical transformation may provide some insight into the chemical processes prevalent in the atmosphere of Titan. During operation of the discharge a solid brown-yellowish deposit was formed on the central rod electrode and the dielectric pellets. Such a deposit is similar to that observed in other N 2 :CH 4 discharges and is believed to be an analogue of the aerosol and dust observed in Titan's atmosphere being composed of chemical species commonly known as 'tholins'.

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Section: And N 2 Dissociation Excitation and Ionizationsupporting

confidence: 75%

“…According to references [47][48][49][50] NH 3 is produced in several steps, first CH 4 and its radicals react with N 2 ? , N ?…”

Section: And N 2 Dissociation Excitation and Ionizationmentioning

confidence: 99%

Packed Bed DBD Discharge Experiments in Admixtures of N2 and CH4

Horváth

Mason

Polachova

et al. 2010

Plasma Chem Plasma Process

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“…In addition to the above methods leading to gas phase plasma in contact with a stationary water solution, there is increasing interest in introducing water directly into the core gas phase plasma region where both metal electrodes are placed in the gas phase. For example, gas phase discharge with humid gas and gliding arc or pulsed discharges with water aerosol sprays have been shown to be effective methods for generating plasma in contact with liquid [20][21][22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Chemical and Physical Characteristics of Pulsed Electrical Discharge Within Gas Bubbles in Aqueous Solutions

Shih¹,

Locke²

2009

Plasma Chem Plasma Process

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The chemical and physical characteristics of pulsed electrical discharge within gas bubbles immersed in an aqueous solution were investigated using a reactor with long protrusion length high voltage needle electrodes. Argon gas was introduced at the base of the needle electrode causing gas bubbles to flow upwards in contact with the needle. The effects of needle protrusion length were evaluated by using 2, 4, and 6 cm length needles under a wide range of power input (3-78 W). No significant differences in chemical or electrical characteristics were found among the different protrusion lengths. H 2 and H 2 O 2 generation rates were proportional to input power and the energy yield efficiency for these species was not affected dramatically by input power. The results of discharge within bubbles in aqueous solution were also compared with those for direct liquid phase discharge and gas phase discharge above the liquid surface.

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“…2 a-b) and did not depend on the frequency. A similar power supply was previously used for investigations on (i) point-to-plane DBD ozone generation [24] and (ii) DBD treatment of dilute methane [25]. The pulsed power supply was All experiments were conducted in synthetic dry air at atmospheric pressure.…”

Section: Methodsmentioning

confidence: 99%

Effect of voltage waveform on dielectric barrier discharge ozone production efficiency

Mericam-Bourdet

Kirkpatrick

Tuvache

et al. 2012

Eur. Phys. J. Appl. Phys.

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Dielectric barrier discharges (DBD) are commonly used for gas effluent cleanup and ozone generation. For these applications, the energy efficiency of the discharge is a major concern. This paper reports on investigations carried out on the voltage shape applied to DBD reactor electrodes, aiming to evaluate a possible energy efficiency improvement for ozone production. Two DBD reactor geometries were used; pin-to-pin and cylinder-to-cylinder, both driven either by a bi-directional power supply (voltage rise rate 1 kV/µs) or a pulsed power supply (voltage rise rate 1 kV/ns). Ozone formed in dry air was measured at the reactor outlet. Special attention was paid to discharge input power evaluation using different methods including instantaneous current-voltage product and transferred charge-applied voltage figures. The charge transferred by the discharges was also correlated to the ozone production. It is shown that, in the case of the DBD reactors under investigation, the applied voltage shape has no influence on the ozone production efficiency. For the considered voltage rise rate, the charge deposit on the dielectric inserted inside the discharge gap is the important factor (as opposed to the voltage shape) governing the efficiency of the discharge -it does this by tailoring the duration of the current peak into the tens of nanoseconds range.

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Dilute Methane Treatment by Atmospheric Pressure Dielectric Barrier Discharge: Effects of Water Vapor

Abstract: International audienc

Cited by 26 publications

References 17 publications

Packed Bed DBD Discharge Experiments in Admixtures of N2 and CH4

Packed Bed DBD Discharge Experiments in Admixtures of N2 and CH4

Chemical and Physical Characteristics of Pulsed Electrical Discharge Within Gas Bubbles in Aqueous Solutions

Effect of voltage waveform on dielectric barrier discharge ozone production efficiency

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