Characteristics of DBD micro-discharge at different pressure and its effect on the performance of oxygen plasma reactor

Rui LIU (刘蕊); Zhe YU (俞哲); Huijuan CAO (曹慧娟); Pu LIU (刘璞); Zhitao ZHANG (张芝涛)

doi:10.1088/2058-6272/aafbbc

Plasma Science and Technology > 2019 > 21(5): 54001-054001. > DOI: 10.1088/2058-6272/aafbbc

Rui LIU (刘蕊), Zhe YU (俞哲), Huijuan CAO (曹慧娟), Pu LIU (刘璞), Zhitao ZHANG (张芝涛). Characteristics of DBD micro-discharge at different pressure and its effect on the performance of oxygen plasma reactor[J]. Plasma Science and Technology, 2019, 21(5): 54001-054001. DOI: 10.1088/2058-6272/aafbbc

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Characteristics of DBD micro-discharge at different pressure and its effect on the performance of oxygen plasma reactor

¹ College of Science, Dalian Maritime University, Dalian 116026, People’s Republic of China
² Institute of Marine Engineering, Dalian Maritime University, Dalian 116026, People’s Republic of China

Funds: This work was supported by National Key Technology Research and Development Program of the Ministry of Science and Technology of China (No. 2013BAC06B02), Public Science and Technology Research Funds Projects of Ocean (No. 201305027), National Natural Science Foundation of China (Nos. 51877024, 61427804, 51309039), Liaoning Scientific Research Project of Department of Education of Liaoning Province (No. LZ2015007) and High Level Talent Innovation Project of Dalian (No. 2016RQ040).

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Received Date: September 28, 2018

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Abstract

Abstract

The oxygen plasma reactor based on dielectric barrier discharge principle can produce a high concentration of reactive oxygen species, which can cooperate with hydraulic cavitation gas–liquid mixer to realize the application of advanced oxidation technology in water treatment. In this technology, the work pressure of the oxygen plasma reactor is decreased by the vacuum suction effect generated in the snap-back section of the gas–liquid mixed container. In this paper, the characteristics of single micro-discharge at different pressures were investigated with the methods of discharge image, electrical characteristics and spectral diagnosis, in order to analyze the electrical characteristics and reactive oxygen species generation efficiency of oxygen plasma reactor at the pressure range from 60 kPa to 100 kPa. The study indicated that, when the pressure decreases, the duty ratio of ionization in the discharge gap and number of electrons with high energy increases, leading to a rise in reactive oxygen species production. When the oxygen reaches the maximum ionization, the concentration of reactive oxygen species is the highest. Then, the discharge intensity continues to increase, producing more heat, which will decompose the ozone and lower the production of reactive oxygen species. The oxygen plasma reactor has an optimum working pressure at different input powers, which makes the oxygen plasma reactor the most efficient in generating reactive oxygen species.
- atmospheric pressure plasma reactor,
- pressure,
- active oxygen particle,
- dielectric barrier discharge

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References (21)

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Characteristics of DBD micro-discharge at different pressure and its effect on the performance of oxygen plasma reactor