Enhancement of plasma-liquid mass transfer of active species and decomposition of organic compounds in water using electrohydrodynamic effect

• Project/Area Number: 25790071
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Plasma electronics
• Research Institution: Tokyo Institute of Technology
• Principal Investigator: TAKEUCHI Nozomi 東京工業大学, 理工学研究科, 講師 (80467018)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2014: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000); Fiscal Year 2013: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
• Keywords: OHラジカル / 促進酸化処理 / 有機物分解 / 気液界面プラズマ / 物質移動 / 電気流体力学効果 / 反応シミュレーション / 活性種 / 水処理 / 物質輸送

Outline of Final Research Achievements

Decomposition of acetic acid in water using plasma on gas-liquid interface and numerical simulation of reactions considering flows and mass transfer were conducted. It was revealed that the gas flow generated by an electrohydrodynamic effect was not effective to enhance the mass transfer of OH radical and hydrogen peroxide transferred to the solution restrained the decomposition of acetic acid.
The addition of ozone into the solution seemed to be effective because OH radical can be re-generated by a reaction between ozone and hydrogen peroxide. The selectivity in generations of OH radical and hydrogen peroxide or ozone has been enhanced by controlling the input power to plasma generated in gas bubbles. It is expected that multiple generation of the plasmas at different powers achieves highly efficient decomposition system of organic compounds in water.

Research Products

• [Journal Article] Comparison of One- and Zero-Dimensional Reaction Models of Liquid-Phase Radicals for Plasma Generated on Gas-Liquid Interface (2014)
  • Author(s): 竹内希
  • Journal Title: IEEJ Transactions on Fundamentals and Materials Volume: 134 Issue: 5 Pages: 315-320
  • DOI: 10.1541/ieejfms.134.315
  • NAID: 130004869363
  • ISSN: 0385-4205, 1347-5533
  • Peer Reviewed
• [Presentation] 水中気泡内プラズマの交流駆動における活性種生成特性 (2014)
  • Author(s): 竹内希，溝口秀彰，白木大地，大保勇人
  • Organizer: 電気関係学会北海道支部連合大会
  • Place of Presentation: 北海道科学大学
  • Year and Date: 2014-10-25
• [Presentation] 気液界面プラズマの反応シミュレーション (2014)
  • Author(s): 竹内希
  • Organizer: 平成26年電気学会全国大会
  • Place of Presentation: 愛媛大学城北キャンパス
• [Presentation] Two-Dimensional Numerical Simulation of Mass Transfer of Reactive Species through Plasma-Liquid Interface (2014)
  • Author(s): Nozomi Takeuchi
  • Organizer: 5th International Conference on Plasma Medicine
  • Place of Presentation: 奈良県新公会堂
• [Presentation] Numerical Simulation of Decomposition of Acetic Acid in Water by Argon Pulsed Plasma (2013)
  • Author(s): Nozomi Takeuchi
  • Organizer: 8th Asia-Pacific International Symposium on the Basics and Applications of Plasma Technology
  • Place of Presentation: National Chiao Tung University, Hsinchu, Taiwan
• [Remarks] 東京工業大学安岡・竹内研究室ホームページ
  • URL: http://www.plasma.ee.titech.ac.jp/