Abstract
Hydrogen absorption experiments were carried out using zirconium (Zr) and titanium (Ti) in the form of a metal sponge, strip and rod to investigate the metal hydride characteristics. The Zr and Ti sponges showed a high hydrogen absorption capacity despite a low reaction temperature. The H/M, which indicates the capacity of hydrogen absorption, was measured at 2.0 for the Zr/Ti sponge at 25 ‡C. In the case of the Zr/Ti strip and rod, however, the hydrogen absorption capacity was very low at 25 ‡C. The capacity of hydrogen absorption increased with an increase in the reaction temperature. When the Ti strip was not activated, the H/M ratio was measured at 0.58. When the Ti strip was once and twice activated at 800 ‡C for 1 hour, the H/M ratio increased to 1.6 and 1.83, respectively. The hydrogen absorption capacity decreased with the increment of concentration of helium in hydrogen due to a blanketing effect of metal surface by the helium. A pulverizing phenomenon during the metal hydriding was observed in both the Zr/Ti strip and the Zr/Ti rod. However, this pulverizing phenomenon was not observed in the Zr/Ti sponges because of their high surface area.
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Lee, S.H., Yoo, J.H. & Chung, H. Metal hydride characteristics by Zr and Ti. Korean J. Chem. Eng. 18, 303–307 (2001). https://doi.org/10.1007/BF02699169
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DOI: https://doi.org/10.1007/BF02699169