Atmospheric pressure glow discharge plasma in air at frequency 50 Hz

Abstract

Homogeneous atmospheric pressure discharge using a dielectric barrier discharge in air at 50 Hz was investigated. Porous alumina ceramic sheets were used as a dielectric barrier. In this paper we compare the filamentary discharge initiated by using glass sheets as a dielectric and the glow discharge obtained by the porous alumina sheets as a dielectric.Generally, the discharge in a dielectric barrier arrangement consists of a large number of filaments. Using porous alumina sheets Al 2 O 3 , an atmospheric pressure glow discharge (APGD) plasma has been obtained. This APGD discharge is characterized by a homogeneous profile of long lifetime (∼5 ms) and the current is one pulse per half cycle of the power supply. The electrical measurements and the emission spectrum confirm that the discharge has been formed in the glow mode.

In-situ regeneration of Au nanocatalysts by atmospheric-pressure air plasma: Significant contribution of water vapor

“…4b, which is similar to current waveform of atmospheric pressure glow discharge in open air [39]. Generally, the generation of a glow discharge in air at atmospheric pressure mainly depends on the configuration of dielectric barrier, electrode geometry and gas flow rate [39][40][41]. Garamoon and El-zeer [39] reported atmospheric pressure glow discharge in air using porous alumina as dielectric barrier, and Wang et al [40] achieved a homogeneous looking discharge in air at atmospheric pressure using mesh electrode.…”

“…In contrast, for the humid plasma in presence of 2.77% H 2 O, the current pulse weakened greatly and a broad peak of discharge current per half voltage cycle appeared as shown in Fig. 4b, which is similar to current waveform of atmospheric pressure glow discharge in open air [39]. Generally, the generation of a glow discharge in air at atmospheric pressure mainly depends on the configuration of dielectric barrier, electrode geometry and gas flow rate [39][40][41].…”

Influence of shock wave propagation on dielectric barrier discharge plasma actuator performance

“…Presence of electronegative gases in air such as oxygen and water vapor efficiently quench nitrogen metastable species and makes a non-uniform microdischarge DBD in atmospheric pressure. [36][37][38] The properties of these microdischarges have been studied extensively in literature. [39][40][41] Current pulses always occur at the voltage-rising half-cycle.…”

Decaying of Nitrogen Second Positive System by Addition of H<sub>2</sub> Gas in Air DB Discharge

“…Addition of hydrogen with different flow rates increases the peak current from (≈3 mA) without H 2 up to (≈13 mA) with H 2 at flow rate of 3 L/min. The enhancement of the discharge current by increasing the amount of H 2 is related to the following reasons; 1) More ionization processes are expected to take place in the present of H 2 such as the reactions in Equations (19), (22)- (25) …”

“…Consequently, the humidity increases the current inside the micro-holes of the porous dielectric and hence increases the seed electrons that sustain the discharge in the glow mode [19].…”