• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Investigation of radical production and reaction mechanism for improvement of chemical reactivity using sub-atmospheric pressure plasma

Research Project

Project/Area Number 19K14968
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 21010:Power engineering-related
Research InstitutionTokyo Metropolitan University

Principal Investigator

Nakagawa Yusuke  東京都立大学, システムデザイン研究科, 助教 (80805391)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2021: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2019: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywords中気圧プラズマ / ラジカル / レーザー分光 / ラジカルフラックス / 酸素原子 / パルス放電 / レーザー計測 / 窒素原子 / プラズマ加工 / 電気機器工学 / 省エネルギー
Outline of Research at the Start

大気圧プラズマは、様々な対象に化学処理を施すことができるが、化学処理において主要な役割を果たすラジカルの寿命が短いという課題がある。本研究では、大気圧からわずかに減圧した中気圧のプラズマを用いて、ラジカルフラックスの向上と均一処理の実現を図る。事前検討において、中気圧プラズマにより大気圧の2倍以上のラジカルフラックスが得られることを見出した。一方、中気圧プラズマのラジカル生成・反応過程は未解明であり、現状では詳細な理論的解析が困難である。本研究では、中気圧プラズマにおける放電様相及びラジカルの挙動をin-situで計測し、中気圧での均一プラズマ生成機構及びラジカル生成・反応過程を解明する。

Outline of Final Research Achievements

Using a mid-pressure plasma, which is a plasma in 0.1-0.9 atm, we aimed to improve the radical flux and achieve uniform treatment while maintaining the diversity of the treatment target. The shape of the mid-pressure plasma was observed with an ICCD camera, and the behavior of atomic nitrogen as a reducing radical and atomic oxygen as an oxidizing radical was measured with laser spectroscopy in the mid-pressure plasma.
The results exhibited that a homogeneous plasma was formed when the pressure was reduced to 0.5 atm or lower. The fluxes of atomic nitrogen and atomic oxygen were 1.6 and 3.5 times higher at 0.3 atm than those at atmospheric pressure, respectively.

Academic Significance and Societal Importance of the Research Achievements

大気圧プラズマを用いた化学反応は生体治療や液中粒子合成、大面積表面処理等に有効であるが、化学反応を司るラジカルの寿命が短いため、無効消費が多いという欠点がある。本研究では大気圧からわずかに減圧した中気圧プラズマを利用することで、ラジカルの生成量を大気圧と同程度以上に維持したまま、ラジカルの寿命を延長し無効消費を抑制できることを科学的に証明した。これにより大気圧プラズマで期待されている様々な適用分野において、プラズマ化学反応の効率が向上し実用化に大きく貢献できる。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (34 results)

All 2022 2021 2020 2019

All Journal Article (4 results) (of which Peer Reviewed: 4 results) Presentation (30 results) (of which Int'l Joint Research: 12 results)

  • [Journal Article] Time evolution of atomic nitrogen density in pure-nitrogen-pulsed barrier discharge at sub-atmospheric pressure2022

    • Author(s)
      Nakagawa Yusuke、Yoshii Tatsuki、Tochikubo Fumiyoshi
    • Journal Title

      Journal of Applied Physics

      Volume: 131 Issue: 11 Pages: 113304-113304

    • DOI

      10.1063/5.0079156

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Interaction between Negative Corona Discharge and Droplet Emission from Liquid Taylor Cone2021

    • Author(s)
      Y. Nakagawa, K. Nagao, F. Tochikubo
    • Journal Title

      Journal of Physics D: Applied Physics

      Volume: 54 Issue: 30 Pages: 305201-305201

    • DOI

      10.1088/1361-6463/abfce9

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Monte Carlo simulation of electrons injected from a low-temperature plasma into liquid water2021

    • Author(s)
      N. Akiyama, Y. Nakagawa, S. Uchida, F. Tochikubo
    • Journal Title

      Journal of Applied Physics

      Volume: 129 Issue: 16 Pages: 163304-163304

    • DOI

      10.1063/5.0044024

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Simultaneous measurement of local densities of atomic oxygen and ozone in pure oxygen pulsed barrier discharge under atmospheric pressure2020

    • Author(s)
      Yusuke Nakagawa, Takuya Kawakita, Satoshi Uchida, Fumiyoshi Tochikubo
    • Journal Title

      Journal of Physics D: Applied Physics

      Volume: 53 Issue: 13 Pages: 135201-135201

    • DOI

      10.1088/1361-6463/ab642b

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] 準大気圧酸素放電における酸素原子密度に対する放電パルス幅の影響2022

    • Author(s)
      大柿慈温, 中川雄介, 杤久保文嘉
    • Organizer
      第23回 静電気学会春期講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] マッハ・ツェンダー干渉計を利用した大気圧Arグロー放電内のガス温度推定2022

    • Author(s)
      吉川昇汰, 中川雄介, 杤久保文嘉
    • Organizer
      第39回プラズマプロセシング研究会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 大気圧純酸素バリア放電下の酸素原子およびオゾンの挙動に及ぼす放電形態の影響2021

    • Author(s)
      中川雄介, 川北拓弥, 杤久保文嘉
    • Organizer
      日本オゾン協会 第30回年次研究講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Behavior of Atomic Oxygen in Pulsed Barrier Discharge in Sub-atmospheric Pressure Oxygen2021

    • Author(s)
      Y. Nakagawa, Y. Iwata, F. Tochikubo
    • Organizer
      74th Gaseous Electronics Conference
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Comparative Analysis of Taylor Cone Dynamics, Electrospray and Discharge C haracteristics betwe en Positive and Negative Corona Discharge using Pulsating Applied V oltage2021

    • Author(s)
      M. T. Tauhida, Y. Nakagawa, F. Tochikubo
    • Organizer
      第45回 静電気学会 全国大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 木材糖化前処理としての水中放電衝撃波処理による機械的作用の評価2021

    • Author(s)
      上田航, 中川雄介, 杤久保文嘉
    • Organizer
      第45回 静電気学会 全国大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 大気圧Heバリア放電中に滴下された微小液滴の挙動観測2021

    • Author(s)
      中川桂輔, 中川雄介, 杤久保文嘉
    • Organizer
      第82回 応用物理学会 秋季学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 準大気圧酸素放電における酸素原子の密度・寿命の圧力依存性2021

    • Author(s)
      中川雄介,岩田優太,杤久保文嘉
    • Organizer
      第82回 応用物理学会 秋季学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 二光子励起レーザー誘起蛍光法を用いた準大気圧酸素放電における酸素原子の挙動観測2021

    • Author(s)
      中川雄介,岩田優太,杤久保文嘉
    • Organizer
      令和3年度 電気学会 基礎・材料共通部門大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 水中放電衝撃波による木材糖化前処理に対する放電周波数と放電エネルギーの影響2021

    • Author(s)
      上田航, 中川雄介, 杤久保文嘉
    • Organizer
      放電・プラズマ・パルスパワー研究会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 準大気圧純酸素バリア放電における酸素原子密度のTALIF計測2021

    • Author(s)
      岩田優太,中川雄介,杤久保文嘉
    • Organizer
      令和3年度 電気学会 全国大会
    • Related Report
      2020 Research-status Report
  • [Presentation] The TALIF measurement of the atomic nitrogen density in sub-atmospheric pressure N2-Ar barrier discharge2021

    • Author(s)
      Tatsuki Yoshii, Yusuke Nakagawa, Satoshi Uchida and Fumiyoshi Tochikubo
    • Organizer
      38th Symposium on Plasma Processing
    • Related Report
      2020 Research-status Report
  • [Presentation] Spatio-temporal distribution of atomic oxygen and ozone under pin-to-sphere oxygen discharge2020

    • Author(s)
      Y. Nakagawa, T. Kawakita, S. Uchida, and F. Tochikubo
    • Organizer
      73rd Gaseous Electronics Conference
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] 中気圧N2-Arバリア放電における窒素原子密度のTALIF計測2020

    • Author(s)
      吉井樹, 中川雄介, 内田諭, 杤久保文嘉
    • Organizer
      第44回 静電気学会 全国大会
    • Related Report
      2020 Research-status Report
  • [Presentation] 大気圧純酸素パルスバリア放電におけるO原子及びオゾンの挙動の電界強度依存性2020

    • Author(s)
      中川雄介, 川北拓弥, 内田諭, 杤久保文嘉
    • Organizer
      第44回 静電気学会 全国大会
    • Related Report
      2020 Research-status Report
  • [Presentation] 極短ギャップ純酸素放電における酸素原子とオゾンの同時密度計測2020

    • Author(s)
      中川雄介, 川北拓弥, 内田諭, 杤久保文嘉
    • Organizer
      第81回 応用物理学会 秋季学術講演会
    • Related Report
      2020 Research-status Report
  • [Presentation] 大気圧非平衡プラズマ中単一液滴の帯電及び化学反応の数値解析2020

    • Author(s)
      横田剛、中川雄介、内田諭、杤久保文嘉
    • Organizer
      電気学会 放電・プラズマ・パルスパワー 誘電絶縁材料 開閉保護 合同研究会
    • Related Report
      2019 Research-status Report
  • [Presentation] 中気圧プラズマにおける窒素原子密度のレーザー分光計測2019

    • Author(s)
      中川雄介、吉井樹、内田諭、杤久保文嘉
    • Organizer
      電気学会 放電・プラズマ・パルスパワー研究会
    • Related Report
      2019 Research-status Report
  • [Presentation] TALIF Spectroscopy of Atomic Nitrogen in Medium Pressure Pulsed Discharge2019

    • Author(s)
      Y. Nakagawa, T. Yoshii, S. Uchida, F. Tochikubo
    • Organizer
      The 10th anniversary of International Workshop on Microplasmas
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 純酸素放電下のO原子密度計測におけるオゾン干渉の分離2019

    • Author(s)
      中川雄介, 川北拓弥, 内田諭, 杤久保文嘉
    • Organizer
      第28回オゾン協会年次研究講演会
    • Related Report
      2019 Research-status Report
  • [Presentation] Effective generation of atomic nitrogen radicals in dielectric barrier discharge at medium pressure2019

    • Author(s)
      Y. Nakagawa, T. Yoshii, S. Uchida, F. Tochikubo
    • Organizer
      34th International Conference on Phenomena in Ionized Gases
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Track of plasma-originated electrons in liquid water for generation of hydrated electrons by Monte-Carlo simulation2019

    • Author(s)
      N. Akiyama, Y. Nakagawa, S. Uchida, F. Tochikubo
    • Organizer
      34th International Conference on Phenomena in Ionized Gases
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] TALIF spectroscopy of atomic oxygen density in extremely narrow gapped oxygen discharge2019

    • Author(s)
      T. Kawakita, Y. Nakagawa, S. Uchida, F. Tochikubo
    • Organizer
      34th International Conference on Phenomena in Ionized Gases
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Characteristics of droplet emission from Taylor cone synchronized with corona discharge current2019

    • Author(s)
      K. Nagao, Y. Nakagawa, S. Uchida, F. Tochikubo
    • Organizer
      34th International Conference on Phenomena in Ionized Gases
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Modelling of charging and liquid-phase chemical reaction of water droplet in atmospheric-pressure plasma2019

    • Author(s)
      G. Yokota, Y. Nakagawa, S. Uchida, F. Tochikubo
    • Organizer
      12th Asian-European International Conference on Plasma Surface Engineering
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 純酸素パルスバリア放電下における酸素原子及びオゾン密度の同時レーザー計測2019

    • Author(s)
      川北拓弥, 中川雄介, 内田諭, 杤久保文嘉
    • Organizer
      第43回静電気学会全国大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Simultaneous Measurement of Local Densities of Atomic Oxygen and Ozone in Pure Oxygen discharge2019

    • Author(s)
      Y. Nakagawa, T. Kawakita, S. Uchida, and F. Tochikubo
    • Organizer
      72nd Gaseous Electronics Conference
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Behavior of Atomic Nitrogen in Medium Pressure Short-gapped Discharge2019

    • Author(s)
      Y. Nakagawa, T. Yoshii, S. Uchida, and F. Tochikubo
    • Organizer
      72nd Gaseous Electronics Conference
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Application of underwater discharge shock wave to wood eating process as a pretreatment of enzymatic saccharification for cellulosic ethanol production2019

    • Author(s)
      F. Tochikubo, R. Ohata, Y. Nakagawa and S. Uchida
    • Organizer
      72nd Gaseous Electronics Conference
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Compensation of Ozone Interference in the TALIF Measurement of Atomic Oxygen under Short-gapped Pure Oxygen Discharge2019

    • Author(s)
      Y. Nakagawa, T. Kawakita, S. Uchida, and F. Tochikubo
    • Organizer
      7th East Asia Joint Symposium on Plasma and Electrostatics Technologies for Environmental Applications (EAPETEA-7)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research

URL: 

Published: 2019-04-18   Modified: 2023-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi