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Water Splitting by low-temperature waste heat

Research Project

Project/Area Number 20K20548
Research Category

Grant-in-Aid for Challenging Research (Pioneering)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 27:Chemical engineering and related fields
Research InstitutionTohoku University

Principal Investigator

Adschiri Tadafumi  東北大学, 材料科学高等研究所, 教授 (60182995)

Co-Investigator(Kenkyū-buntansha) 成 基明  東北大学, 未来科学技術共同研究センター, 特任助教 (30747259)
笘居 高明  東北大学, 多元物質科学研究所, 教授 (80583351)
横 哲  東北大学, 材料科学高等研究所, 講師 (80807339)
Project Period (FY) 2020-07-30 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥26,000,000 (Direct Cost: ¥20,000,000、Indirect Cost: ¥6,000,000)
Fiscal Year 2022: ¥9,750,000 (Direct Cost: ¥7,500,000、Indirect Cost: ¥2,250,000)
Fiscal Year 2021: ¥9,490,000 (Direct Cost: ¥7,300,000、Indirect Cost: ¥2,190,000)
Fiscal Year 2020: ¥6,760,000 (Direct Cost: ¥5,200,000、Indirect Cost: ¥1,560,000)
Keywords水の熱化学分解 / 水素生成 / 低温熱利用 / 産業排熱 / 地熱 / ケミカルループ / 反応場分離 / 超臨界ナノ工学 / CeO2 / 酸素キャリア / 低温排熱利用 / 酸素貯蔵放出 / 超臨界水熱法 / 水素製造 / 低温廃熱 / Water-Splitting / 界面 / 未利用熱
Outline of Research at the Start

本研究は、地熱エネルギーや産業からの低温未利用熱を利用したケミカルルーピングプロセスによる、水の熱分解水素および酸素生成を主目的とする。すでに見出された低温で4桁近くも大きな酸素移動現象は、高温超電導にも匹敵するインパクトの大きな発見である。この低温酸素移動発現の原理解明を行いつつ、超臨界法による巨大酸素貯蔵能キャリア開発を行う。最終的には、ケミカルルーピングによる低温Water Splittingを実験的に実証し、本プロセスの可能性を評価する。

Outline of Final Research Achievements

In this project, thermochemical water splitting was studied using chemical loop method with metal oxide materials as oxygen carriers. By using supercritical method, highly active oxygen carrier nanomaterials were developed. Particulartly, CeO2 based nanomaterials were highly active for both reduction and oxidation by water. This method is promising for the utilization of low-temperature heat and hydrogen production.

Academic Significance and Societal Importance of the Research Achievements

本研究では、地熱や産業排熱などの効率的な利用による水分解により、水素と酸素を分離して回収するプロセスの開発を検討した。そのプロセスを実現するための酸素キャリアとして金属酸化物のナノ材料の合成を行い、200~500 °Cで高活性な酸素キャリアを複数見出した。これはナノサイエンスの分野で大きな成果である。反応場分離による水の熱化学分解についてその概念実証に取り組み、現状800~1000 °Cの領域ではあるがその可能性が見出された。今後は、さらなる低温化や水素および酸素の生成量の増加を目指して、プロセス開発を進めていくことが期待される。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (16 results)

All 2024 2023 2022 2021 2020 Other

All Int'l Joint Research (1 results) Journal Article (4 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 4 results,  Open Access: 2 results) Presentation (10 results) (of which Int'l Joint Research: 6 results,  Invited: 2 results) Remarks (1 results)

  • [Int'l Joint Research] University of Suwon(韓国)

    • Related Report
      2023 Annual Research Report
  • [Journal Article] Effect of Exposed Facets and Oxidation State of CeO2 Nanoparticles on CO2 Adsorption and Desorption2024

    • Author(s)
      Seong, G., Yoko, A., Tomai, T., Naka, T., Wang H., Frenkel, A.I., Adschiri, T.
    • Journal Title

      ACS Sustainable Chemistry & Engineering

      Volume: ACCEPTED, IN PRESS

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Supercritical Hydrothermal Reactions for Material Synthesis2023

    • Author(s)
      Adschiri Tadafumi、Takami Seiichi、Umetsu Mitsuo、Ohara Satoshi、Naka Takashi、Minami Kimitaka、Hojo Daisuke、Togashi Takanari、Arita Toshihiko、Taguchi Minori、Itoh Masahiro、Aoki Nobuaki、Seong Gimyeong、Tomai Takaaki、Yoko Akira
    • Journal Title

      Bulletin of the Chemical Society of Japan

      Volume: 96 Issue: 2 Pages: 133-147

    • DOI

      10.1246/bcsj.20220295

    • Related Report
      2023 Annual Research Report 2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Supercritical Hydrothermal Synthesis of Organic‐Modified Ce1‐xZrxO2-δ (0<x<1) Nanoparticles as a Low‐Temperature Oxygen Carrier2022

    • Author(s)
      Yoko Akira、Kamonvarapitak Thunyapong、Seong Gimyeong、Tomai Takaaki、Adschiri Tadafumi
    • Journal Title

      ChemNanoMat

      Volume: 8 Issue: 4 Pages: 1-8

    • DOI

      10.1002/cnma.202100495

    • Related Report
      2022 Research-status Report 2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Uniform Organically Modified CeO2 Nanoparticles Synthesized from a Carboxylate Complex under Supercritical Hydrothermal Conditions: Impact of Ce Valence2022

    • Author(s)
      Omura Yuki、Yoko Akira、Seong Gimyeong、Nishibori Maiko、Ninomiya Kakeru、Tomai Takaaki、Adschiri Tadafumi
    • Journal Title

      The Journal of Physical Chemistry C

      Volume: 126 Issue: 13 Pages: 6008-6015

    • DOI

      10.1021/acs.jpcc.2c00088

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Presentation] Synthesis of single nm size CeO2 by supercritical hydrothermal synthesis and their unusual properties2023

    • Author(s)
      Adschiri, T.
    • Organizer
      The 19th European Meeting on Supercritical Fluids (EMSF2023) Budapest, Hungary
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Chemical reactions in supercritical water and their applications2022

    • Author(s)
      Adschiri, T.
    • Organizer
      The 12th International Conference on Supercritical Fluids (Supergreen2022)
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Waste and biomass valorization by supercritical hydrothermal processing2022

    • Author(s)
      Adschiri, T.
    • Organizer
      The 9th International Conference on Engineering for Waste and BiomassValorisation (WasteEng2022)
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Low-temperature chemical looping process for methane conversion using oxygen carriers synthesized by supercritical hydrothermal methods2022

    • Author(s)
      Seong, G., Yoko, A., Tomai, T., Adschiri, T.
    • Organizer
      The 12th International Conference on Supercritical Fluids (Supergreen2022)
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Preparation of Pt-CeO2 nanoparticles using supercritical hydrothermal method for low-temperature chemical looping steam methane reforming process2022

    • Author(s)
      Seong, G., Furuya, K., Yoko, A., Tomai, T., Adschiri, T.
    • Organizer
      The 13th International Symposium on Supercritical Fluids (ISSF2022)
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] The kinetic analysis of surface redox reaction for CeO2 nanoparticle with (100) facet2022

    • Author(s)
      Takahashi, D., Tomai, T., Yoko, A., Seong, G., Adschiri, T.
    • Organizer
      The 12th International Conference on Supercritical Fluids (Supergreen2022)
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] 金属酸化物ナノ粒子による水の低温熱分解プロセスの開発2021

    • Author(s)
      Kamonvarapitak Thunyapong, 笘居 高明, 横 哲, 成 基明, 阿尻 雅文
    • Organizer
      化学工学会第52回秋季大会
    • Related Report
      2021 Research-status Report
  • [Presentation] 金属酸化物ナノ粒子の複合化による低温酸素吸蔵放出材料の開発2021

    • Author(s)
      Kamonvarapitak Thunyapong, 笘居 高明, 横 哲, 成 基明, 阿尻 雅文
    • Organizer
      化学工学会第86年会
    • Related Report
      2020 Research-status Report
  • [Presentation] 超臨界有機修飾による酸化鉄ナノ粒子のサイズ・露出面制御とその酸素貯蔵能2020

    • Author(s)
      渡邉 裕太, 横 哲, 成 基明, 笘居 高明, 阿尻 雅文
    • Organizer
      化学工学会第51回秋季大会
    • Related Report
      2020 Research-status Report
  • [Presentation] 表面修飾複合酸化物ナノ酸素キャリアの超臨界水熱合成2020

    • Author(s)
      Kamonvarapitak Thunyapong, 笘居 高明, 横 哲, 成 基明, 阿尻 雅文
    • Organizer
      化学工学会第51回秋季大会
    • Related Report
      2020 Research-status Report
  • [Remarks] 阿尻研究室ホームページ

    • URL

      https://www.wpi-aimr.tohoku.ac.jp/ajiri_labo/index.html

    • Related Report
      2023 Annual Research Report 2022 Research-status Report

URL: 

Published: 2020-08-03   Modified: 2025-01-30  

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