Influence of Mn or Mn plus Fe on the hydrogen storage properties of the Ti-Cr-V alloy

To increase the hydrogen storage capacity and the plateau pressure of the Ti 0.32Cr 0.43V 0.25 alloy, a fraction of the Cr was replaced with Mn or a combination of Mn and Fe. When Mn was used alone, the effective hydrogen storage capacity increased to about 2.5 wt% though the plateau pressure showed...

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Bibliographic Details
Published in:International journal of hydrogen energy 2009-11, Vol.34 (22), p.9116-9121
Main Authors: Yoo, Jeong-Hyun, Shim, Gunchoo, Park, Choong-Nyeon, Kim, Won-Baek, Cho, Sung-Wook
Format: Article
Language:English
Subjects:
Alloy plating
Alternative fuels. Production and utilization
Applied sciences
BCC alloy
Body centered cubic lattice
Chromium
Energy
Exact sciences and technology
Fuels
Hydrogen
Hydrogen absorption
Hydrogen storage
Hydrogen storage alloy
Iron
Lattice parameters
Manganese
P-C isotherm
Plateau pressure
Titanium base alloys
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Summary:To increase the hydrogen storage capacity and the plateau pressure of the Ti 0.32Cr 0.43V 0.25 alloy, a fraction of the Cr was replaced with Mn or a combination of Mn and Fe. When Mn was used alone, the effective hydrogen storage capacity increased to about 2.5 wt% though the plateau pressure showed no significant change. When Fe was added with Mn, however, both the effective hydrogen storage capacity and the plateau pressure increased. The BCC (body centered cubic) lattice parameter of the alloy decreased linearly with the Fe content, but it was not affected by Mn alone. The effective hydrogen storage capacity of the Ti 0.32Cr 0.32V 0.25Fe 0.03Mn 0.08 alloy was about 2.5 wt%, higher than 2.35 wt% in the original alloy. The estimated usable hydrogen stored in the Ti 0.32Cr 0.32V 0.25Fe 0.03Mn 0.08 alloy was 2.71 wt% in the temperature and pressure range of 293–353 K and 5–0.002 MPa, respectively.
ISSN:0360-3199
1879-3487
DOI:10.1016/j.ijhydene.2009.08.064