A Novel Dielectric Barrier Discharge (DBD) Reactor with Streamer and Glow Corona Discharge for Improved Ozone Generation at Atmospheric Pressure

Abstract

Discharge mode is an important parameter for ozone synthesis by dielectric barrier discharge (DBD). Currently, it is still challenging to stably generate glow discharge with oxygen at atmospheric pressure. In this paper, a DBD reactor with a layer of silver placed between the electrode and the dielectric layer (SL-DBD) was developed. Experimental results show that both streamer and glow corona discharge were stably generated under sinusoidal excitation with a 0.5 mm discharge gap in a parallel-plate DBD, due to the increased electric field strength in the discharge gap by the silver layer. It was also found that, in the SL-DBD reactor, glow corona discharge enhances the discharge strength by 50 times. The spectral peak of O at 777 nm in SL-DBD is increased to 28,800, compared with 18,389 in a reactor with a streamer only. The SL-DBD reactor produces ozone with a concentration of as high as 150 g/m3 and shows good stability in an 8 h durability test.

DMA Analysis of Plasma Modified PVC Films and the Nature of Initiated Surface Changes

“…The main idea of the present study is to investigate changes on PVC surfaces after DCSBD plasma treatment. This change/modification can be initiated by a generated DCSBD plasma discharge directly on the investigated surfaces or an indirect recorded change in the averted surface (backside treatment), possibly supported by the effects of the generated DCSBD discharge, i.e., UV radiation, ozone generated [37], and electric discharge generated. After plasma treatment, new, matte areas on the surfaces of PVC polymeric films appear.…”

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“…However, while ozonation itself saves energy, the energy requirement for ozone generation can vary depending on the method used [59]. Several methods can be used to produce gaseous ozone, among which the corona discharge method is most commonly used for industrial ozonators [60]. In laboratories, the photochemical method can also be used to produce gaseous ozone [4].…”

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“…However, while ozonation itself saves energy, the energy requirement for ozone generation can vary depending on the method used [59]. Several methods can be used to produce gaseous ozone, among which the corona discharge method is most commonly used for industrial ozonators [60]. In laboratories, the photochemical method can also be used to produce gaseous ozone [4].…”