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Study on air revitalization using CO2 electrolysis aiming for high O2 recovery rate

Research Project

Project/Area Number 18K04566
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 24010:Aerospace engineering-related
Research InstitutionJapan Aerospace EXploration Agency

Principal Investigator

Sakurai Masato  国立研究開発法人宇宙航空研究開発機構, 研究開発部門, 研究領域主幹 (80344258)

Co-Investigator(Kenkyū-buntansha) 後藤 琢也  同志社大学, 理工学部, 教授 (60296754)
金久保 光央  国立研究開発法人産業技術総合研究所, 材料・化学領域, 主任研究員 (70286764)
島 明日香  国立研究開発法人宇宙航空研究開発機構, 研究開発部門, 主任研究開発員 (80570035)
Project Period (FY) 2018-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2018: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywords空気再生 / CO2電解 / イオン液体 / 炭素製造 / 生命維持技術 / 二酸化炭素電解 / 宇宙
Outline of Final Research Achievements

In this study, we investigated the possibility of extracting oxygen and electrolyzing CO2 at low temperature by utilizing carbon production by electrolysis of CO2 in ionic liquid. In order to saturate the ionic liquid with CO2 gas, CO2 gas was introduced into the ionic liquid at 1 atm. From the results of cyclic voltammetry in a 25:75 mol% mixture of [DEME] [TFSI] and [BMIM] [BF4], a reduction current was observed at a negative potential of -0.5 V or higher. The current was thought to correspond to the electrochemical reduction of CO2 in the melt. Constant potential electrolysis was performed in the range of -0.8V to -1.0V, and the obtained sample was measured using SEM and EDS. As a result, carbon was detected in the sample obtained by electrolysis at -1.0 V.

Academic Significance and Societal Importance of the Research Achievements

宇宙船では資源が非常に限られており、呼吸に消費される酸素も再生が必要である。サバチエ反応(CO2+ 4H2→CH4 + 2H2O)を用いた空気再生プロセスでは呼吸に含まれるCO2からO2の約50%しか回収することができない。本研究ではイオン液体中のCO2の電気分解による炭素生成を利用して酸素を抽出し低温でCO2を電解する可能性を調査した。イオン液体は揮発性が極めて低いので、固体吸着剤と同様にガス分離と吸収液の再生が可能である。社会的意義としては温暖化ガスであるCO2をメタンという燃料に変換することによりCO2のリユースの方法となり得る。

Report

(5 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (13 results)

All 2021 2020 2019 2018

All Journal Article (1 results) Presentation (12 results) (of which Int'l Joint Research: 4 results,  Invited: 1 results)

  • [Journal Article] 宇宙船における空気清浄化などの技術について2020

    • Author(s)
      桜井誠人
    • Journal Title

      空気清浄

      Volume: 57巻1号 Pages: 4-9

    • Related Report
      2020 Research-status Report
  • [Presentation] A Guideline for a Sustainable Lunar Base Design for Constructed in Lunar Lava Tubes and Their Vertical Skylights2021

    • Author(s)
      Masato Sakurai, Asuka Shima, Isao Kawano, Junichi Haruyama, Hiroyuki Miyajima
    • Organizer
      50th ICES, ICES-2021-186, 12-15 July 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Reactor Design for the Sabatier Reaction with a High-Temperature Tolerant Catalyst2021

    • Author(s)
      Asuka Shima,1 Masato Sakurai, Keiichiro Moriwaki, Miyuki Kobayashi and Takayuki Abe
    • Organizer
      50th ICES, ICES-2021-168 (2021)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Development status of Oxygen Generation System and Sabatier System for future exploration missions2021

    • Author(s)
      Chiaki Yamazaki, Shotaro Futamura, Toshiharu Oka, Satoshi Matsumoto, Asuka Shima, Masato Sakurai and Sogo Nakanoya
    • Organizer
      50th ICES ICES-2021-181, 12-15 July 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] JSASS宇宙ビジョン2050増補版-月面基地-2021

    • Author(s)
      桜井 誠人、後藤 大亮、白坂 成功、河野 功、田中 宏明、上野 誠也
    • Organizer
      3S02,第66回宇宙科学技術連合講演会(2022)
    • Related Report
      2021 Annual Research Report
  • [Presentation] JSASS宇宙ビジョン2050増補版 -有人月面基地-2020

    • Author(s)
      桜井誠人、石濱直樹、水野素子、河野功、上野誠也
    • Organizer
      宇宙科学技術連合講演会
    • Related Report
      2020 Research-status Report
  • [Presentation] 宇宙船内の空気再生技術と地球における物質循環2020

    • Author(s)
      桜井 誠人
    • Organizer
      新化学技術推進協会 環境技術部会 講演会
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] イオン液体中のCO2電解に関する基礎実験2019

    • Author(s)
      桜井 誠人・島 明日香・後藤 琢也・金久保 光央
    • Organizer
      化学工学会
    • Related Report
      2019 Research-status Report
  • [Presentation] 宇宙居住用生命維持技術開発2019

    • Author(s)
      後藤琢也、大平充宣
    • Organizer
      宇宙環境利用シンポジウム
    • Related Report
      2019 Research-status Report
  • [Presentation] ISRU に向けた溶融塩電解基礎研究2019

    • Author(s)
      後藤琢也,鈴木祐太,福中康博
    • Organizer
      マイクログラビティ応用学会
    • Related Report
      2019 Research-status Report
  • [Presentation] 宇宙機のためのイオン液体によるCO2除去に関する基礎研究2019

    • Author(s)
      桜井 誠人・島 明日香・金久保 光央・牧野 貴至・梅木 辰也
    • Organizer
      化学工学会
    • Related Report
      2018 Research-status Report
  • [Presentation] Preliminary study of Absorption / Desorption Process Using Ionic Liquid for CO2 Removal2018

    • Author(s)
      Masato Sakurai, Mitsuhiro Kanakubo, Takashi Makino, Tatsuya Umecky
    • Organizer
      ICES
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] イオン液体中 での CO2電解反応 の検討2018

    • Author(s)
      岩崎和之 ,染谷佳之 ,後藤琢也 ,福中康博,金久保光央 ,桜井誠人
    • Organizer
      マイクログラビティ応用学会
    • Related Report
      2018 Research-status Report

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Published: 2018-04-23   Modified: 2023-01-30  

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