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http://dx.doi.org/10.7316/KHNES.2019.30.1.8

The Study of the Hydrogen Absorption and Desorption Reactions of Mg under Near Constant Pressure Using the Sievert's Type Automatic Apparatus  

HAN, JEONG-SEB (Department of Material Science & Engineering, Dong-A University)
KIM, SUNJUNG (MIRAE SI)
Publication Information
Transactions of the Korean hydrogen and new energy society / v.30, no.1, 2019 , pp. 8-13 More about this Journal
Abstract
In order to apply the Sievert's type automatic apparatus to thermal analysis of hydrogen absorbing materials, the Sievert's type automatic apparatus was modified in my laboratory. In this study, an experiment was conducted to see if hydrogen absorption and desorption reactions are possible under near constant pressure (${\pm}0.05atm$) using this device. The hydrogenation and dehydrogenation of the Mg-H system was investigated. And the program was also modified for the kinetics. It was found that it is possible to measure the hydrogen absorption rate under near constant pressure of Mg by using the modified Sievert's type automatic apparatus at 573 K and 598 K. And using this system, the hydrogen desorption rate of Mg hydride under near constant pressure at 623 K was also measurable. However, since the hydrogen desorption rate of Mg hydride is fast at 648 K, the hydrogen desorption reaction did not proceed within a constant pressure range of $0.15{\pm}0.05atm$.
Keywords
Mg; Volumetric method; Absorption; Desorption; Constant pressure;
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Times Cited By KSCI : 2  (Citation Analysis)
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