Local initiative hydrogen production by utilization of aluminum waste materials and natural acidic hot-spring water
Local initiative hydrogen production by utilization of aluminum waste materials and natural acidic hot-spring water
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DOI：
10.1016/j.apenergy.2021.116909
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发表时间：
2021-04-17
期刊：
影响因子：
11.2
通讯作者：
Tsuchiya, Noriyoshi
中科院分区：
文献类型：
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作者：
Alviani, Vani Novita;Hirano, Nobuo;Tsuchiya, Noriyoshi
氢作为一种能源正在受到关注，但通过化石燃料生产氢并不环保。更可持续的来源可能是涉及铝和水反应的水热反应，其具有铝钝化的技术问题和用于大规模应用的材料来源。本研究分析了实验室和现场规模的铝-水热反应，并包括对涉及极低pH值（-1）和沸点温度（-373 K）的温泉水的H2燃料生产的环境评估。酸性温泉可替代水源，其独特的特性是通过侵蚀铝表面的氧化层来活化铝表面，从而产生氢气。铝废料的来源包括浮渣和切削屑，它们可以取代原铝金属。最高的H2产率可以获得约~ 55 mmol H2 gAl- 1（几乎达到理论产率）的碎片和较少量的~ 20 mmol H2 gAl- 1的浮渣。环境评估包括整个H2燃料系统的二氧化碳排放和能耗，从而降低了环境影响。拟议的制氢方法鼓励当地规模的氢能开发。此外，铝废料的使用是一种新的和有用的废物管理策略，而不是直接处置，温泉的使用促进了其直接利用。
Hydrogen is gaining attention as an energy source, but its production through fossil-fuel use is not environmentally friendly. A more sustainable source could be the hydrothermal reaction involving aluminum and water reaction, which owns technical issues on aluminum passivation and material sources for the upscale application. This study analyzes the aluminum-water hydrothermal reaction at laboratory and field scales and includes an environmental assessment of H2 fuel production involving hot-spring water with extremely low pH (-1) and boiling temperature (-373 K). Acidic hot-spring alternates water sources, and its unique feature activates aluminum surface by attacking oxide layer, hence enables H2 generation. Aluminum waste sources include dross and cutting chips, which could replace primary aluminum metal. The highest H2 yield could be obtained of about -55 mmol H2 gAl- 1 for the chip (almost reached theoretical yield) and a smaller amount of -20 mmol H2 gAl- 1 for dross. The environmental assessment comprises carbon dioxide emissions and energy consumption from the overall H2 fuel system resulting in a reduced environmental impact. The proposed hydrogen production method encourages hydrogen energy development from the local scale. In addition, the use of aluminum waste materials is a new and useful waste management strategy than direct disposal, and hot-springs use advances its direct utilization.