Development and Evaluation of Newly Designed Coaxial Cylindrical Plasma Reactor with Liquid Flow Control and Post-Discharge Reactions for Water Treatment
Water purification by non-equilibrium atmospheric pressure plasma has attracted much attention and is expected to be a next-generation method. However, general approaches to improve the energy efficiency of the water purification have not been revealed. Therefore, to investigate important factors fo...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-05-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/15/11/4028 |
| _version_ | 1827665197746094080 |
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| author | Kosuke Tachibana Ryosuke Hanabata Takashi Furuki Ryuta Ichiki Seiji Kanazawa Marek Kocik |
| author_facet | Kosuke Tachibana Ryosuke Hanabata Takashi Furuki Ryuta Ichiki Seiji Kanazawa Marek Kocik |
| author_sort | Kosuke Tachibana |
| collection | DOAJ |
| description | Water purification by non-equilibrium atmospheric pressure plasma has attracted much attention and is expected to be a next-generation method. However, general approaches to improve the energy efficiency of the water purification have not been revealed. Therefore, to investigate important factors for increasing its energy efficiency, we developed coaxial cylindrical plasma reactors where pulsed streamers were generated between a high-voltage electrode and running water film. To evaluate the performance of the plasma reactors, we measured hydroxyl (OH) radicals in solution based on a chemical probe method using disodium terephthalic acid (NaTA) and decolorized indigo carmine solution. Our experimental results showed that the production rate of the OH radicals was approximately 20 nmol/s and that the energy efficiency of the decolorization was on the order of 10 g/kWh. In addition, we found that controlling liquid flow based on the Coandă effect and introducing the intermittent operation of the streamer discharges to use post-discharge reactions increased the energy efficiency by a factor of approximately 3.5, which indicated that these approaches are effective to improve the performance of the water purification by plasma. |
| first_indexed | 2024-03-10T01:21:03Z |
| format | Article |
| id | doaj.art-8390daa9f3f94d5b818dbfa5ec933441 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T01:21:03Z |
| publishDate | 2022-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-8390daa9f3f94d5b818dbfa5ec9334412023-11-23T13:59:08ZengMDPI AGEnergies1996-10732022-05-011511402810.3390/en15114028Development and Evaluation of Newly Designed Coaxial Cylindrical Plasma Reactor with Liquid Flow Control and Post-Discharge Reactions for Water TreatmentKosuke Tachibana0Ryosuke Hanabata1Takashi Furuki2Ryuta Ichiki3Seiji Kanazawa4Marek Kocik5Department of Innovative Engineering, Oita University, 700 Dannoharu, Oita 870-1192, JapanDepartment of Innovative Engineering, Oita University, 700 Dannoharu, Oita 870-1192, JapanDepartment of Innovative Engineering, Oita University, 700 Dannoharu, Oita 870-1192, JapanDepartment of Innovative Engineering, Oita University, 700 Dannoharu, Oita 870-1192, JapanDepartment of Innovative Engineering, Oita University, 700 Dannoharu, Oita 870-1192, JapanInstitute of Fluid Flow Machinery, Polish Academy of Sciences, Fiszera 14, 80-231 Gdańsk, PolandWater purification by non-equilibrium atmospheric pressure plasma has attracted much attention and is expected to be a next-generation method. However, general approaches to improve the energy efficiency of the water purification have not been revealed. Therefore, to investigate important factors for increasing its energy efficiency, we developed coaxial cylindrical plasma reactors where pulsed streamers were generated between a high-voltage electrode and running water film. To evaluate the performance of the plasma reactors, we measured hydroxyl (OH) radicals in solution based on a chemical probe method using disodium terephthalic acid (NaTA) and decolorized indigo carmine solution. Our experimental results showed that the production rate of the OH radicals was approximately 20 nmol/s and that the energy efficiency of the decolorization was on the order of 10 g/kWh. In addition, we found that controlling liquid flow based on the Coandă effect and introducing the intermittent operation of the streamer discharges to use post-discharge reactions increased the energy efficiency by a factor of approximately 3.5, which indicated that these approaches are effective to improve the performance of the water purification by plasma.https://www.mdpi.com/1996-1073/15/11/4028non-equilibrium plasmapulsed streamerwater filmOH radicalchemical probe methodCoandă effect |
| spellingShingle | Kosuke Tachibana Ryosuke Hanabata Takashi Furuki Ryuta Ichiki Seiji Kanazawa Marek Kocik Development and Evaluation of Newly Designed Coaxial Cylindrical Plasma Reactor with Liquid Flow Control and Post-Discharge Reactions for Water Treatment Energies non-equilibrium plasma pulsed streamer water film OH radical chemical probe method Coandă effect |
| title | Development and Evaluation of Newly Designed Coaxial Cylindrical Plasma Reactor with Liquid Flow Control and Post-Discharge Reactions for Water Treatment |
| title_full | Development and Evaluation of Newly Designed Coaxial Cylindrical Plasma Reactor with Liquid Flow Control and Post-Discharge Reactions for Water Treatment |
| title_fullStr | Development and Evaluation of Newly Designed Coaxial Cylindrical Plasma Reactor with Liquid Flow Control and Post-Discharge Reactions for Water Treatment |
| title_full_unstemmed | Development and Evaluation of Newly Designed Coaxial Cylindrical Plasma Reactor with Liquid Flow Control and Post-Discharge Reactions for Water Treatment |
| title_short | Development and Evaluation of Newly Designed Coaxial Cylindrical Plasma Reactor with Liquid Flow Control and Post-Discharge Reactions for Water Treatment |
| title_sort | development and evaluation of newly designed coaxial cylindrical plasma reactor with liquid flow control and post discharge reactions for water treatment |
| topic | non-equilibrium plasma pulsed streamer water film OH radical chemical probe method Coandă effect |
| url | https://www.mdpi.com/1996-1073/15/11/4028 |
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