Investigation of hydrogen storage capacity of various carbon materials

Hydrogen storage capacity of various carbon materials, including activated carbon (AC), single-walled carbon nanohorn, single-walled carbon nanotubes, and graphitic carbon nanofibers, was investigated at 303 and 77 K, respectively. The results showed that hydrogen storage capacity of carbon material...

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Bibliographic Details
Published in:International journal of hydrogen energy 2007-09, Vol.32 (13), p.2504-2512
Main Authors: Xu, W.-C., Takahashi, K., Matsuo, Y., Hattori, Y., Kumagai, M., Ishiyama, S., Kaneko, K., Iijima, S.
Format: Article
Language:English
Subjects:
Activated carbon
Alternative fuels. Production and utilization
Applied sciences
Carbon nanohorn
Carbon nanotubes
Energy
Exact sciences and technology
Fuels
Graphitic carbon nanofiber
Hydrogen
Hydrogen storage
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Summary:Hydrogen storage capacity of various carbon materials, including activated carbon (AC), single-walled carbon nanohorn, single-walled carbon nanotubes, and graphitic carbon nanofibers, was investigated at 303 and 77 K, respectively. The results showed that hydrogen storage capacity of carbon materials was less than 1 wt% at 303 K, and a super activated carbon, Maxsorb, had the highest capacity (0.67 wt%). By lowering adsorption temperature to 77 K, hydrogen storage capacity of carbon materials increased significantly and Maxsorb could store a large amount of hydrogen (5.7 wt%) at a relatively low pressure of 3 MPa. Hydrogen storage capacity of carbon materials was proportional to their specific surface area and the volume of micropores, and the narrow micropores was preferred to adsorption of hydrogen, indicating that all carbon materials adsorbed hydrogen gas through physical adsorption on the surface.
ISSN:0360-3199
1879-3487
DOI:10.1016/j.ijhydene.2006.11.012