研究課題/領域番号 |
21K21329
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研究種目 |
研究活動スタート支援
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配分区分 | 基金 |
審査区分 |
1101:環境解析評価、環境保全対策およびその関連分野
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研究機関 | 東北大学 |
研究代表者 |
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研究期間 (年度) |
2021-08-30 – 2023-03-31
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研究課題ステータス |
交付 (2021年度)
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配分額 *注記 |
3,120千円 (直接経費: 2,400千円、間接経費: 720千円)
2022年度: 1,560千円 (直接経費: 1,200千円、間接経費: 360千円)
2021年度: 1,560千円 (直接経費: 1,200千円、間接経費: 360千円)
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キーワード | hydrogen production / aluminum waste / acidic hot spring / geothermal / Hydrogen / Hot spring / Geothermal / Life cycle assessment / Aluminum waste |
研究開始時の研究の概要 |
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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研究実績の概要 |
In terms of research activities, we have undertaken a fundamental study of aluminum waste and acidic geothermal hot spring water reactions for producing hydrogen in both lab-scale and onsite designs. The study revealed that strong acidity, elevated temperature, and higher chloride-containing hot springs effectively disrupted the aluminum surface's oxide layer. Therefore, aluminum's surface morphology became rougher and pitted, which allowed water to penetrate deeply and drastically enhanced aluminum reactivity with water to release hydrogen. We have also conducted a life cycle assessment to evaluate the environmental impact of the system studied. As a result, hydrogen fuel use from aluminum waste materials-acidic hot spring reactions reduced environmental impacts (i.e., carbon emission and energy consumption) compared to gasoline and primary aluminum use. The negative CO2 emission results reflected emission reduction due to hot spring neutralization (replacing limestone input). As for research output, we have published the journal article, performed collaborative work relevant to the future research direction, and made presentations at academic meetings. We are currently exploring treatments on aluminum (and some potential metals) to generate more hydrogen effectively, clarifying the possible impurities, working on a techno-economic assessment of the system, and preparing for presentations and relevant publications.
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現在までの達成度 (区分) |
現在までの達成度 (区分)
2: おおむね順調に進展している
理由
The timeline is currently on track as planned. We are exploring the best-suited methods for effectively treating the aluminum (or some potential metals) to generate hydrogen more effectively that are environmentally friendly and practical. Also, we are planning to clarify the possible impurities in the system. Subsequently, we aim for a comprehensive study on environmental and technological aspects (i.e., life cycle and techno-economic assessments).
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今後の研究の推進方策 |
Our strategy is similar to that planned. In realizing the research plan, we expect to find effective methods for activating aluminum (and some potential metals, if possible), investigate the associated impurities from the system, and present a comprehensive study of life cycle assessment and techno-economic assessment. We plan to perform the research as timely as possible and have some ongoing collaborative research to direct the development of hydrogen energy.
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