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The Evaluation of Hydrogenation Properties on $MgH_x-Fe_2O_3$ Composite by Mechanical Alloying  

Seok, Song (Department of Materials Science and Engineering/Research Center for Sustainable ECo-Devices and Materials(ReSEM), Chungju National University)
Cho, Kyoung-Won (Department of Materials Science and Engineering/Research Center for Sustainable ECo-Devices and Materials(ReSEM), Chungju National University)
Hong, Hae-Whan (Department of Materials Science and Engineering/Research Center for Sustainable ECo-Devices and Materials(ReSEM), Chungju National University)
Publication Information
Transactions of the Korean hydrogen and new energy society / v.18, no.1, 2007 , pp. 26-31 More about this Journal
Abstract
Hydrogen has a high potential to be a renewable substitute for fossil fuels, because of its high gravimetric energy density and environment friendliness. In particular, Magnesium have attracted much interest since their hydrogen capacity exceeds that of known metal hydrides. One of the approaches to improve the kinetic is addition of metal oxide. In this paper, the effect of $Fe_2O_3$ concentration on the kinetics of Mg hydrogen absorption reaction was investigated. $MgH_x-Fe_2O_3$ composites have been synthesized by hydrogen induced mechanical alloying. The powder synthesized was characterized by XRD, SEM and simultaneous TG, DSC analysis. The hydrogenation behaviors were evaluated by using a sievert's type automatic PCT apparatus. Absorption and desorption kinetics of Mg catalyzed with 5,10 mass% $Fe_2O_3$ are determined at 423, 473, 523, 573, 623K.
Keywords
hydrogen storage materials; metal hydride; iron oxide; mechanical alloying; kinetic;
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