Effect of surface acidity of activated carbon on hydrogen storage

Hydrogen adsorption studies at 78 K and pressures up to 40 atmosphere were conducted on nine commercial activated carbon samples. The amount of hydrogen adsorbed increased with increasing surface area. Surface modification consisting of controlled high-temperature reduction and oxidation revealed th...

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Bibliographic Details
Published in:Carbon (New York) 1987, Vol.25 (2), p.219-226
Main Authors: Agarwal, R.K., Noh, J.S., Schwarz, J.A., Davini, P.
Format: Article
Language:English
Subjects:
Activated carbon
Alternative fuels. Production and utilization
Applied sciences
BET surface area
Energy
Exact sciences and technology
Fuel processing. Carbochemistry and petrochemistry
Fuels
hydrogen storage
surface acidity
surface modification
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Summary:Hydrogen adsorption studies at 78 K and pressures up to 40 atmosphere were conducted on nine commercial activated carbon samples. The amount of hydrogen adsorbed increased with increasing surface area. Surface modification consisting of controlled high-temperature reduction and oxidation revealed that BET surface area was not affected by these treatments. The surface acidity, however, increased with increasing oxygen treatment. The amount of hydrogen adsorbed also increased as the surface acidity of the activated carbons increased.
ISSN:0008-6223
1873-3891
DOI:10.1016/0008-6223(87)90119-9