2023 Fiscal Year Final Research Report
Development of an innovative reactive oxygen species supply method for liquids using corona discharge
| Project/Area Number |
21K04035
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 21010:Power engineering-related
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| Research Institution | Osaka Institute of Technology |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
眞銅 雅子 大阪工業大学, 工学部, 准教授 (10345481)
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| Project Period (FY) |
2021-04-01 – 2024-03-31
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| Keywords | コロナ放電 / 水処理 / 難分解性物質 / 数値解析 |
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| Outline of Final Research Achievements |
OH radicals can be generated by using reactive oxygen species supplied to the liquid surface by corona discharge irradiation. In this study, to clarify the reaction process of corona discharge treatment, we investigated the flow of the liquid phase during corona discharge irradiation and performed a two-dimensional numerical analysis of the concentration of chemical species. We also conducted corona discharge treatment experiments using different polarities. The results showed that the pH of the liquid surface changes during corona discharge treatment, which has a significant effect on the chemical reactions in the liquid. It was also found that it is important not to use a pump to circulate the liquid surface, which is the part where reactive oxygen species are supplied.
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| Free Research Field |
放電化学
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| Academic Significance and Societal Importance of the Research Achievements |
コロナ放電処理では放電照射によって液面のpHが変化する。しかしながら、そのpH変化は緩衝液を用いることで抑制することができる。また、活性酸素種が供給される領域である液面は液体ポンプなどで積極的に動かさない方が水処理を行う上で有利であることがわかった。さらに放電極性については、正負どちらでも処理量に差はないが、正極性の場合、印加電圧を高めると短絡しコロナ放電処理を維持できないことから、破壊電圧の高い負極性が水処理を行う場合に適切である。これらの知見は学術的にも社会的にも価値があり、放電プラズマを用いた液中化学プロセス技術の発展に寄与するものと考えられる。
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