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Combustion in Fuel Cell -Mechanism on abrupt evolution from moderate combustion to combustion damage-

Research Project

Project/Area Number 16H02316
Research Category

Grant-in-Aid for Scientific Research (A)

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

Principal Investigator

ITO KOHEI  九州大学, 工学研究院, 教授 (10283491)

Co-Investigator(Kenkyū-buntansha) 北川 敏明  九州大学, 工学研究院, 教授 (40214788)
Research Collaborator NAKAJIMA Hironori  
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥42,770,000 (Direct Cost: ¥32,900,000、Indirect Cost: ¥9,870,000)
Fiscal Year 2018: ¥8,970,000 (Direct Cost: ¥6,900,000、Indirect Cost: ¥2,070,000)
Fiscal Year 2017: ¥16,250,000 (Direct Cost: ¥12,500,000、Indirect Cost: ¥3,750,000)
Fiscal Year 2016: ¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
KeywordsPEFC / 触媒燃焼 / 遷移過程 / 固体高分子形燃料電池 / 電解質膜 / 燃焼損傷 / 素反応 / アレニウスプロット / DCS / 水素触媒燃焼 / 熱工学 / 燃料電池
Outline of Final Research Achievements

This study challenges to clarify the hydrogen combustion mechanism in PEFC. Heat flow of H2 combustion under PEFC temperature was evaluated through DCS, where a piece of Pt black was embedded with suppling a syngas to suppose crossover in the cell. Reaction rate components, such as reaction order and activation energy (Ea), were derived from the heat flow, and the Ea agreed with a reference measured under higher temperature. Reaction rate was calculated based on elementary processes carefully chosen, and a comparison between the measured and calculated value figured out that H2 absorption process is rate determining step of the combustion on platinum. Reaction rate in practical catalyst layer case was also derived from heat flow by DSC. This value became same with the theoretical value considering diffusion process in the layer and the rate in Pt black case. This result suggests that we can predict H2 combustion rate in catalyst layer when catalyst structure and Pt loading are given.

Academic Significance and Societal Importance of the Research Achievements

固体高分子形燃料電池内部の電解質膜は時間経過ともに劣化し、ガス隔壁性が失われ、微小燃焼から燃焼損傷に至りうる。しかし燃焼損傷過程の定量的な現象予測が難しく、過剰設計の原因となっている。初期の穏やかな触媒燃焼段階では電圧の低下等から検知できるが、膜劣化に起因する混合気発生から燃焼損傷への遷移メカニズムは未明である。更に実際の発電中には力学的負荷が膜に重畳され、劣化が加速する。このように燃焼損傷過程は複雑なため、合理的な対策を見出せていない。本研究により燃焼損傷メカニズムを解明し、膜への最低限の仕様や、燃焼損傷の検知法が提案できればPEFCの適正設計も可能で、 低コスト化に貢献できる。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Annual Research Report
  • 2016 Annual Research Report
  • Research Products

    (8 results)

All 2018 2017 2016

All Presentation (8 results) (of which Int'l Joint Research: 2 results)

  • [Presentation] Catalytic combustion mechanism in PEMFC -Measurement and analysis of combustion rate-2018

    • Author(s)
      Daijiro Takeuchi, Yuichiro Kamai, Akiko Inada, Takahiro Karimata, Hironori Nakajima, Kohei Ito
    • Organizer
      The 69th Annual Meeting of the International Society of Electrochemistry
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] ピンホールに起因する混合気形成・触媒燃焼の解析 (PEFC燃焼損傷の合理的な対策に向けて)2018

    • Author(s)
      釜井 雄一朗、竹内 大二郎、稲田 顕子、中島 裕典、狩俣 貴大、伊藤 衡平
    • Organizer
      第 55 回日本伝熱シンポジウム講演論文集
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 固体高分子形燃料電池内部の燃焼過程の赤外線画像法による解析2018

    • Author(s)
      釜井雄一朗、竹内大二郎稲田顕子、狩俣貴大、中島裕典、伊藤衡平
    • Organizer
      日本機会学会九州支部大会
    • Related Report
      2017 Annual Research Report
  • [Presentation] 固体高分子形燃料電池内部のクロスオーバーを想定した燃焼2017

    • Author(s)
      竹内大二郎、松本篤磨、 伊藤衡平、中島裕典、稲田顕子
    • Organizer
      日本伝熱シンポジウム
    • Related Report
      2017 Annual Research Report
  • [Presentation] 固体高分子形燃料電池内部の燃焼メカニズムの考察 ―DSCによる燃焼速度の計測―2017

    • Author(s)
      竹内大二郎、松本篤磨、中島裕典、伊藤衡平
    • Organizer
      電池討論会
    • Related Report
      2017 Annual Research Report
  • [Presentation] 固体高分子形燃料電池内部クロスオーバーに 起因する燃焼の速度のDSCによる計測2017

    • Author(s)
      竹内大二郎,伊藤衡平,松本篤磨,中島裕典
    • Organizer
      日本機械学会九州支部 第70期総会・講演会
    • Place of Presentation
      佐賀市
    • Related Report
      2016 Annual Research Report
  • [Presentation] 固体高分子形燃料電池内部のクロスオーバーを想定した燃焼2017

    • Author(s)
      竹内 大二郎, 松本 篤磨, 稲田 顕子, 狩俣 貴大, 中島 裕典, 伊藤 衡平
    • Organizer
      第 54 回日本伝熱シンポジウム
    • Place of Presentation
      さいたま市
    • Related Report
      2016 Annual Research Report
  • [Presentation] 固体高分子形燃料電池内部の燃焼2016

    • Author(s)
      松本篤磨, 水谷千晶, 伊藤 衡平
    • Organizer
      日本機械学会2016年度年次大会
    • Place of Presentation
      福岡市
    • Related Report
      2016 Annual Research Report

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Published: 2016-04-21   Modified: 2021-01-27  

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