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Evaluations for Fire-Suppression Abilities and Inhibition Reaction Mechanisms of Halon Replacements in Low-Temperature Combustion

Research Project

Project/Area Number 16560194
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Thermal engineering
Research InstitutionSophia University

Principal Investigator

TAKAHASHI Kazuo  Sophia University, Faculty of Science and Technology, Lecturer (10241019)

Co-Investigator(Kenkyū-buntansha) 猪俣 忠昭  上智大学, 理工学部, 教授 (30053656)
Project Period (FY) 2004 – 2006
Project Status Completed (Fiscal Year 2006)
Budget Amount *help
¥2,600,000 (Direct Cost: ¥2,600,000)
Fiscal Year 2006: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 2005: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 2004: ¥1,400,000 (Direct Cost: ¥1,400,000)
KeywordsHalon Replacements / Hydrofluorocarbons / Rapid Compression Machine / Shock Tube / Turbulent Flow Reactor / Induction Period for Ignition / Reaction Intermediates / Low-Temperature Combustion / ヘプタン / HFC227ea / GC-MS / ハロン代替消化剤 / 熱分解反応 / 乱流流通反応管 / 反応速度 / 反応経路 / ヘプタフルオロプロパン / 負の温度計数領域 / 燃焼抑制
Research Abstract

In this research project, the evaluations for fire-suppression abilities and the inhibition reaction mechanisms of hydrofluorocarbons, which are ones of the halon replacements, have been investigated at temperatures lower than 1000 K. A rapid compression machine was newly manufactured for this research project, in addition to a shock tube and a turbulent flow reactor.
In the ignitions of isobutane, the induction periods for ignition monotonically decreased with temperature. When HFC-227ea (2H-heptafluoropropane, CF_3CHFCF_3) was added in the mixtures of isobutane and air, the ignitions were suppressed. However, this inhibition effect was not caused by the deactivation of chain-carriers by fluorine atoms, because fluorine-free propane had the same inhibition effect as HFC-227ea.
In the ignitions of n-heptane, a negative temperature coefficient (NTC)region, where the induction periods increased with temperature, was observed. The addition of HFC-227ea gave the promotion for the n-heptane ignitions, in contrast to the isobutane ignitions. In the NTC region, oxygen molecules are added to alkyl radicals formed from fuel, so that alkylperoxy radicals (ROO) are produced. The alkylperoxy radicals are changed to hydroperoxyalkyl radicals (R'OOH) by the migration of H atoms. If HFC-227ea is added, the alkylperoxy radicals abstract H atoms from HFC-227ea to become peroxides. The peroxides docompose into OH radicals which are among the important chain-carriers in combustion, leading to the promotion of ignitions.

Report

(4 results)
  • 2006 Annual Research Report   Final Research Report Summary
  • 2005 Annual Research Report
  • 2004 Annual Research Report
  • Research Products

    (25 results)

All 2007 2006 2005 2004

All Journal Article (14 results) (of which Peer Reviewed: 3 results) Presentation (11 results)

  • [Journal Article] Thermal Decompositions of 1,1,1-Trifluoroethane and Pentafluoroethane in a Turbulent Flow Reactor2007

    • Author(s)
      Kazuo Takahashi, et. al.
    • Journal Title

      Combustion Science and Technology 179

      Pages: 1417-1432

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Thermal Decompositions of 1, 1, 1-Trifluoroethane and Pentafluoroethane in a Turbulent Flow Reactor2007

    • Author(s)
      K., Takahashi, A., Harada, S., Horigome, R., Cho, T., Inomata
    • Journal Title

      Combustion Science and Technology 179

      Pages: 1417-1432

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Thermal Decompositions of 1,1,1-Trifluoroethane and Pentafluoroethane in a Turbulent Flow Reactor2007

    • Author(s)
      Kazuo Takahashi et al.
    • Journal Title

      Combustion Science and Technology (In press)

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Kinetic Studies on the Reactions of Dimethyl Ether with Oxygen and Hydrogen Atoms at High Temperatures2006

    • Author(s)
      K.Takahashi, et. al.
    • Journal Title

      International Journal of Chemical Kinetics 39

      Pages: 97-108

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] High Efficiency VOC Decomposition Using Complex System(OH Radical, Ozone-UV and TiOz)2006

    • Author(s)
      M., Kogoma, Y., Miki, K., Tanaka, K., Takahashi
    • Journal Title

      Plasma Processes and Polymers 3

      Pages: 727-733

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Kinetic Studies on the Reactions of Dimethyl Ether with Oxygen and Hydrogen Atoms at High Temperatures2006

    • Author(s)
      K., Takahashi, O., Yamamoto, T., Inomata, M., Kogoma
    • Journal Title

      International Journal of Chemical Kinetics 39

      Pages: 97-108

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Kinetic Studies on the Reactions of Dimethyl Ether with Oxygen and Hydrogen Atoms at High Temperatures2006

    • Author(s)
      Kazuo Takahashi et al.
    • Journal Title

      International Journal of Chemical Kinetics 39

      Pages: 97-108

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Shock-Tube Studies on the Fire-Suppression Reactions of HFC-227ea2005

    • Author(s)
      K.Takahashi, et. al.
    • Journal Title

      Twenty-Fifth Symposium(International)on Shock Waves

      Pages: 627-632

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Shock-Tube Studies on the Fire-Suppression Reactions of HFC-227ea2005

    • Author(s)
      K., Takahashi, O., Yamamoto, T., Inomata
    • Journal Title

      Twenty-Fifth Symposium(Inter-national) on Shock Waves

      Pages: 627-632

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Kinetic Studies on the Reactions of Heptafluoropropanes with O(^3P) and H Atoms at High Temperatures2004

    • Author(s)
      O., Yamamoto, K., Takahashi, T., Inomata
    • Journal Title

      The Journal of Physical Chemistry A 108

      Pages: 1417-1424

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Shock-Tube Studies on the Reactions of 2H-Heptafluoropropane with H and O(3P) Atoms and the Subsequent Reactions2004

    • Author(s)
      O., Yamamoto, K., Takahashi, T., Inomata
    • Journal Title

      Twenty-Fourth Symposium(Inter-national) on Shock Waves

      Pages: 627-632

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Shock-tube studies on the reactions of 2H-heptafluoropropane with H and O(^3P) atoms2004

    • Author(s)
      O.Yamamoto, K.Takahashi, T.Inomata
    • Journal Title

      Proceedings of Twenty-four Symposium (International) on Shock Waves

      Pages: 1311-1311

    • Related Report
      2004 Annual Research Report
  • [Journal Article] 低温燃焼におけるハロン代替消化剤の性能評価と抑制機構2004

    • Author(s)
      田中達朗, 高橋和夫, 猪俣忠昭
    • Journal Title

      第42回燃焼シンポジウム講演論文集

      Pages: 317-317

    • Related Report
      2004 Annual Research Report
  • [Journal Article] 2H-ヘプタフルオロプロパンの燃焼抑制反応 -トリフルオロエチレンと酸素原子および水素原子との高温反応-2004

    • Author(s)
      長亨祐, 高橋和夫, 猪俣忠昭
    • Journal Title

      第42回燃焼シンポジウム講演論文集

      Pages: 43-43

    • Related Report
      2004 Annual Research Report
  • [Presentation] Kinetic Studies on the Early Processes of Benzene Combustion Behind Shock Waves2007

    • Author(s)
      R., Cho, K., Takahashi, K., Tanaka, M., Kogoma
    • Organizer
      Symposium on Shock Waves in Japan
    • Place of Presentation
      Fukuoka, Japan
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Presentation] Studies on the Ignitions of Gasoline Components in a High Pressure Shock Tube2007

    • Author(s)
      K., Tomiyasu, K., Takahashi, K., Tanaka, M., Kogoma
    • Organizer
      The Forty-Fifth Symposium(Japanese) on Combustion
    • Place of Presentation
      Sendai, Japan
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Presentation] Experimental and Theoretical Studies on Pyrolyses of Some Hydrofluoroethanes2006

    • Author(s)
      K.Takahashi, et. al.
    • Organizer
      The Thirty-First International Symposium on Combustion
    • Place of Presentation
      Heidelberg,Germany
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Presentation] Experimental and Theoretical Studies on Pyrolyses of Some Hydrofluoroethanes2006

    • Author(s)
      K., Takahashi, O., Yamamoto, R., Cho, T., Inomata
    • Organizer
      The Thirty-First International Symposium on Combustion
    • Place of Presentation
      Heidelberg, Germany
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Presentation] High-Temperature Reactions of Phenyl Radicals with Atomic and Molecular Oxygen2006

    • Author(s)
      R., Cho, K., Takahashi, T., Inomata
    • Organizer
      Symposium on Shock Waves in Japan
    • Place of Presentation
      Yokohama, Japan
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Presentation] Studies on the Ignitions of Heptane, Iso-Octane, Toluene, and Their Miixtures Behind Shock Waves2006

    • Author(s)
      K., Tomiyasu, R., Cho, K., Takahashi, M., Kogoma, T., Inomata
    • Organizer
      The Forty-Fourth Symposium(Japanese) on Combustion
    • Place of Presentation
      Hiroshima, Japan
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Presentation] Shock-Tube Studies on the Fire-Suppression Reactions of HFC-227ea2005

    • Author(s)
      K., Takahashi, O., Yamamoto, T., Inomata
    • Organizer
      Twenty-Fifth Symposium(Inter-national) on Shock Waves
    • Place of Presentation
      Bangalore, India
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Presentation] Combustion Reactions for Halon Alternatives HFC-227ea and Its Fire Suppression Mechanism2005

    • Author(s)
      K., Takahashi, O., Yamamoto, R., Cho, T., Inomata
    • Organizer
      International Fluorine Conference in Toyama
    • Place of Presentation
      Toyama, Japan
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Presentation] Inhibition Reaction of Combustion by 2H-Heptafluoropropane - High-Temperature Reactions of Trifluoroethylene with Oxygen and Hydrogen-2004

    • Author(s)
      R., Cho, K., Takahashi, T., Inomata
    • Organizer
      The Forty-Second Symposium(Japanese) on Combustion
    • Place of Presentation
      Gifu, Japan
    • Year and Date
      2004-01-03
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Presentation] Performance Evaluation and Inhibition Mechanism of Halon Replacements in Low-Temperature Combustion2004

    • Author(s)
      T., Tanaka, K., Takahashi, T., Inomata
    • Organizer
      The Forty-Second Symposium(Japanese) on Combustion
    • Place of Presentation
      Gifu, Japan
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Presentation] Shock-Tube Studies on the Reactions of 2H-Heptafluoropropane with H and O(3P) Atoms and the Subsequent Reactions2004

    • Author(s)
      O., Yamamoto, K., Takahashi, T., Inomata
    • Organizer
      Twenty-Fourth Symposium(Inter-national) on Shock Waves
    • Place of Presentation
      Beijing, China
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary

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Published: 2004-04-01   Modified: 2016-04-21  

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