| Project/Area Number |
21K21329
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| Research Category |
Grant-in-Aid for Research Activity Start-up
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| Allocation Type | Multi-year Fund |
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| Review Section |
1101:Environmental analyses and evaluation, environmental conservation measure and related fields
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| Research Institution | Tohoku University |
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Principal Investigator |
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| Project Period (FY) |
2021-08-30 – 2024-03-31
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| Project Status |
Completed (Fiscal Year 2023)
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| Budget Amount *help |
¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2022: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2021: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Keywords | Hydrogen production / Direct geothermal use / Alumnium waste / Acidic hot spring / Life cycle assessment / Aluminum waste / REE extraction / Techno-economic analysis / REE recovery / Hydrogen / Hot spring / Geothermal / Life cycle analysis / hydrogen production / aluminum waste / acidic hot spring / geothermal |
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| Outline of Research at the Start |
This research outlines a reaction of aluminum waste materials and hot springs with the following considerations:
(1) Producing hydrogen at the low hydrothermal reaction,
(2) Applying environmentally-friendly oxide removal techniques,
(3) Investigating impurities such as As and H2S from the reaction, and
(4) Conducting a life cycle assessment of the overall processes to impact categories such as carbon emission, energy requirement, cost, and social analysis, etc.
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| Outline of Final Research Achievements |
This study uses a multidisciplinary approach to explore direct geothermal use via acidic thermal springs for local-scale hydrogen energy initiatives. The study demonstrates the effectiveness and cost-efficiency of utilizing the aluminum-water low hydrothermal reaction under specific pH and temperature conditions to disrupt the aluminum oxide layer. Furthermore, the study validates the potential use of waste materials (aluminum dross and cutting chips) with acidic hot springs at the laboratory and onsite experiments. Environmental assessment reveals lower carbon dioxide emissions from aluminum waste than primary aluminum-based hydrogen and gasoline fuels.
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| Academic Significance and Societal Importance of the Research Achievements |
この研究は、温泉とアルミニウム廃棄物を利用してグリーン水素を製造するパイオニアである。複雑な処理やメカニズムを必要としない、グリーン水素製造の新たな選択肢を提供するものである。グリーン水素製造であることに加え、提案された方法は、廃棄物管理戦略、直接的な地熱利用、酸性温泉の中和といった利点がある。
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