Hydrogen-storage properties of Mg–oxide alloys prepared by reactive mechanical grinding

The samples Mg–10 wt.% M (M = Fe 2O 3 purchased, Fe 2O 3 by spray conversion, MnO purchased, and SiO 2 by spray conversion) were prepared by mechanical grinding under H 2 (reactive mechanical grinding) under the optimum conditions for the preparation of the sample Mg–10 wt.% Fe 2O 3 using purchased...

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Bibliographic Details
Published in:Journal of alloys and compounds 2006-05, Vol.415 (1), p.266-270
Main Authors: Song, Myoung Youp, Kwon, IkHyun, Kwon, SungNam, Park, ChanGi, Hong, Seong-Hyeon, Bae, Jong-Soo, Mumm, Daniel R.
Format: Article
Language:English
Subjects:
Addition of Fe 2O 3
Alternative fuels. Production and utilization
Applied sciences
Energy
Exact sciences and technology
Fuels
H 2-sorption properties of Mg
Hydriding and dehydriding rates
Hydrogen
MnO and SiO 2
Reactive mechanical grinding
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Summary:The samples Mg–10 wt.% M (M = Fe 2O 3 purchased, Fe 2O 3 by spray conversion, MnO purchased, and SiO 2 by spray conversion) were prepared by mechanical grinding under H 2 (reactive mechanical grinding) under the optimum conditions for the preparation of the sample Mg–10 wt.% Fe 2O 3 using purchased Fe 2O 3. The activated Mg–10 wt.% Fe 2O 3 by spray conversion has the highest hydriding rate ( H a = 5.55 wt.% at 593 K, 12 bar H 2 for 60 min) of all the samples. The activated Mg–10 wt.% MnO has the highest dehydriding rate ( H d = 1.94 wt.% at 593 K, 1.0 bar H 2 for 60 min). The equilibrium plateau pressure is about 1.5 bar H 2. The effects of reactive mechanical grinding and hydriding–dehydriding cycling on the hydrogen properties of Mg were discussed.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2005.08.002