Influence of multiple oxide (Cr2O3/Nb2O5) addition on the sorption kinetics of MgH2

Aep Patah, Akito Takasaki, Janusz S. Szmyd

研究成果: Article査読

87 被引用数 (Scopus)

抄録

The influence of multiple additions of two oxides, Cr2O3 and Nb2O5, as additives on the hydrogen sorption kinetics of MgH2 after milling was investigated. We found that the desorption kinetics of MgH2 were improved more by multiple oxide addition than by single addition. Even for the milled MgH2 micrometric size powders, the high hydrogen capacity with fast kinetics were achieved for the powders after addition of 0.2 mol% Cr2O3 + 1 mol% Nb2O5. For this composition, the hydride desorbed about 5 wt.% hydrogen within 20 min and absorbed about 6 wt.% in 5 min at 300 °C. Furthermore, the desorption temperature was decreased by 100 °C, compared to MgH2 without any oxide addition, and the activation energy for the hydrogen desorption was estimated to be about 185 kJ mol-1, while that for MgH2 without oxide was about 206 kJ mol-1.

本文言語English
ページ(範囲)3032-3037
ページ数6
ジャーナルInternational Journal of Hydrogen Energy
34
7
DOI
出版ステータスPublished - 2009 4月

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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