Exergetic life cycle assessment of new waste aluminium treatment system with co-production of pressurized hydrogen and aluminium hydroxide

Takehito Hiraki, Tomohiro Akiyama

研究成果: Article査読

33 被引用数 (Scopus)

抄録

A new system is proposed for the treatment of waste aluminium. The total exergy loss (EXL) in the system for the co-production of 1 kg of hydrogen at 30 MPa and 26 kg of aluminium hydroxide is evaluated from the viewpoint of life cycle assessment (LCA) by comparison with the EXLs in conventional systems. The exergy flow diagram reveals that the exergy of waste aluminium, which contains only 15 mass% metal, is still large, while that of pure aluminium hydroxide is relatively small. Therefore, the EXL in the proposed system (150.9 MJ) is 55% less than that in the conventional system (337.7 MJ) in which the gas compressor and production of aluminium hydroxide consume significantly more exergy. The results also indicate that exergy analysis should be applied to the LCA as a critical measure for practical use, in addition to the conventional LCA of carbon dioxide emission.

本文言語English
ページ(範囲)153-161
ページ数9
ジャーナルInternational Journal of Hydrogen Energy
34
1
DOI
出版ステータスPublished - 2009 1
外部発表はい

ASJC Scopus subject areas

  • 再生可能エネルギー、持続可能性、環境
  • 燃料技術
  • 凝縮系物理学
  • エネルギー工学および電力技術

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