Cyclic stability test of AB2 type (Ti, Zr)(Ni, Mn, V, Fe) sub(2.18) for stationary hydrogen storage in water contaminated hydrogen

Totalized Hydrogen Energy Utilization System (THEUS), which consists of fuel cells, water electrolyzers, hydrogen storage and their auxiliary components, is proposed for the stationary application. In the previous researches, mischmetal-based MmNi sub(5) compound was used for the stationary hydrogen...

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Bibliographic Details
Published in:Journal of alloys and compounds 2013-12, Vol.580, p.S255-S258
Main Authors: Maeda, Tetsuhiko, Fuura, Tatsuya, Matsumoto, Itoko, Kawakami, Yoshiaki, Masuda, Masao
Format: Article
Language:English
Subjects:
Alloys
Contamination
Hydrogen storage
Hydrogen-based energy
Manganese
Mischmetal
Stability
Stability tests
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Summary:Totalized Hydrogen Energy Utilization System (THEUS), which consists of fuel cells, water electrolyzers, hydrogen storage and their auxiliary components, is proposed for the stationary application. In the previous researches, mischmetal-based MmNi sub(5) compound was used for the stationary hydrogen storage in THEUS. However, the cost of mischmetal is so expensive that can be an obstacle to the practical use of THEUS. In addition, since THEUS utilizes hydrogen produced by water electrolysis, it is necessary to confirm the influence of the water contamination on the metal hydride reactivity. The samples were Ti sub(0.24)-Zr sub(0.76)Ni sub(1.2)Mn sub(0.64)V sub(0.14)Fe sub(0.18) (Sample A) and the sample with 1 at.%-La addition (Sample B). Using hydrogen including 40 ppm-water, hydrogen absorption and desorption was carried out 30 times. The degradation of hydrogen storage capacity was observed for Sample A while not observed for La-added Sample B. The results revealed that the addition of La improved cyclic stability against the water contamination.
ISSN:0925-8388
DOI:10.1016/j.jallcom.2013.03.230