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2002 Fiscal Year Final Research Report Summary

INVESTIGATION ON REMOVAL PROCESS OF ENVIRONMENTAL CONTAMINANTS BY ATMOSPHERIC PRESSURE NON-THERMAL PLASMA

Research Project

Project/Area Number 12450108
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field 電力工学・電気機器工学
Research InstitutionThe University of Tokyo

Principal Investigator

ODA Tetsuji  School of Engineering, Professor, 大学院・工学系研究科, 教授 (90107532)

Co-Investigator(Kenkyū-buntansha) OGATA Atsushi  National Institute of Advanced Industrial Science and Technology, Tsukuba West Institute, Senior Researcher, つくば西事業所, 主任研究員(研究職)
ITAGAKI Toshihumi  School of Engineering, Research Associate, 大学院・工学系研究科, 助手 (60242012)
SHIMIZU Kazuo  School of Frontier Sciences, Research Associate, 大学院・新領域創成科学研究科, 助手 (90282681)
IMAI Tadashi  Toshiba, Division of Social Industry Systems, Senior Researcher, 社会産業システム事業部・熱分解システム技術部, 主事(研究職)
ONO Ryo  School of Frontier Sciences, Research Associate, 大学院・新領域創成科学研究科, 助手 (90323443)
Project Period (FY) 2000 – 2002
KeywordsNon-Thermal Plasma / Environmental Protection Technology / Laser Induced Fluoresecnce / Radical / NO Decomposition / Ozone
Research Abstract

This project was carried out from April, 200 to March 2003 supported by the "grant-in-Aid for Scientific Research (B) from JSPS. Main targets of that projet were developing NOx removal technology from the combustion flue gas and dilute VOCs removal technology from contaminated air by using atmospheric pressure nonthermal plasma. For that purpose, the removal mechanism of those contaminants by the plasma was also investigated. The barrier discharge reactor with a bolt discharge electrode at the center of that cylindrical reactor driven by a 50 Hz ac high voltage was found the best practical reactor. The plasma process combined with the catalyst worked well and improved the energy efficiency to remove VOCs from air. Newly a laser-induced-fluorescence (LIF) method was constructed for diagnosis of the pulse plasma using a tunable narrow band KrF excimer laer (248nm) which was very insensible for a quenching effect. Time evolution of two dimensional OH radical behavior was observed just after the pulse discharge. The OH radical generation and decay were strongly dependent on the discharge mode and gas conditions. The LIF method to detect NO, NO^* and O_2 were also developed. For NO detection, second harmonics of a tunable dye laser, 226nm, was also utilized. OH generation or NO decomposition by the discharge were very active in the streamer region made by the plasma. If the concentration of NO is low, some radical exists and progresses to other region to decompose other NO with time.
Ozone generation and decay were also detected in two dimension by laser-absorption method where the ozone decomposition (generating O radical).was also identified.
The correlation between the discharge current and generation of various kinds of radicals is also studied now resulting the development of more effective environmental techniques in near futre.

  • Research Products

    (18 results)

All Other

All Publications (18 results)

  • [Publications] T.Oda: "Non-thermal plasma processing for environmental protection : decomposition of dilute VOCs in air"Journal of Electrostatics. 57. 293-311 (2003)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Oda, R.Ono: "Application of LIF-techniques to atmospheric pressure non-thermal plasma"Selected Research Papers on Spectroscopy of non-equilibrium plasma at elevated pressures Poc. SPIE. 4460. 263-273 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] R.Ono, T.Oda: "NO formation in a pulsed spark discharge in N2/O2/Ar mixture at atmospheric pressure"J. Phys. D (Appl. Phys). 35. 543-548 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] R.Ono, T.Oda: "Dynamics and density estimation of hydroxyl radicals in a pulsed corona discharge"J. Phys. D (Appl. Phys). 35. 2133-2138 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Oda, T.Takahashi, K.Yamaji: "Non-Thermal Plasma Processing for Dilute VOCs Decomposition"IEEE Trans. Ind. Appl.. 38. 873-878 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] R.Ono, T.Oda: "Measurement of Hydroxyl Radicals in Pulsed Corona Discharge"Journal of Electrostatics. 55. 333-342 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T. Oda: "Non-thermal plasma processing for Environmental protection : decomposition of dilute VOCs in air"Journal of Electrostatics. 57, 1, 3/4. 293-313 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T. Oda and R. Ono: "Application of LIF-techniques to atmospheric pressure non-thermal plasma"Selected Research Papers on Srectroscopy of non-equilibrium plasma at elevated pressures Poc. SPIE. 4460. 263-273 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] R. Ono and T. Oda: "NO formation in a pulsed spark discharge in N2/O2/Ar mixture at atmospheric pressure"J. Phys.D(Appl.Phys). 35. 543-548 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] R. Ono and T. Oda: "Dynamics and density estimation of hydroxyl radicals in a pulsed corona discharge"J. Phys. D(Appl.Phys). 35. 2133-2138 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T. Oda, T. Takahashi and K. Yamaji: "Non-Thermal Plasma Processing for Dilute VOCs Decomposition"IEEE Trans. Ind. Appl.. 38, 3. 873-878 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] R. Ono and T. Oda: "Measurement of Hydroxyl Radicals in Pulsed Corona Discharge"Journal of Electrostatics. 55. 333-342 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K. Shimizu and T. Oda: "Nitrogen Oxides Removal by Using Plate Type Reactor Combined with Catalysts"J. Adv. Oxid. Technol. 5, 2. 217-222 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] R. Ono and T. Oda: "Generation and Extinction Processes of OH Radicals in a Pulsed Spark Discharge with Dilute Alcohol"J. Inst. EIectrost. Jpn. 26, 1. 28-33 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T. Oda: "Fundamentals of Electrostatics -Electrostatic Chuck"J. Vac. Soc. Jpn. 45, 8. 626-631 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T. Oda, T. Takahashi and S. Kohzuma: "Decomposition of Dilute Trichloroethylene by Using Nonthermal Plasma Processing - Frequency and Catalyst Effects"lEEE Trans. Ind. Appl.. 37, 4. 965-970 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] R. Ono and T. Oda: "OH Radical Measurement in a Pulsed Arc Discharge Plasma Observed by a LIF Method"JEEE Trans. Ind. Appl.. 37, 3. 709-714 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K. Shimizu, T. Hirano and T. Oda: "Effect of Water Vapor and Hydrocarbons in Removing NOx by Using Nonthermal Plasma and Catalyst"IEEE Trans. Ind. Appl.. 37, 2. 464-471 (2001)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2004-04-14  

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