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Hydrogen storage in carbon nanotubes: Residual metal content and pretreatment temperature
Author(s) -
Lueking Angela,
Yang Ralph T.
Publication year - 2003
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690490619
Subject(s) - catalysis , hydrogen , hydrogen spillover , adsorption , desorption , hydrogen storage , metal , inorganic chemistry , carbon fibers , carbon nanotube , chemistry , chemical engineering , activated carbon , materials science , organic chemistry , nanotechnology , composite material , composite number , engineering
Hydrogen storage in MWNT was enhanced via the catalytic activity of NiMgO. The magnitude of the hydrogen to metal ratio for the MWNT/NiMgO system, combined with temperature programmed adsorption and desorption studies, showed hydrogen spillover from the catalyst to the carbon surface. Metal doping combined with temperature activation studies showed that both nickel and magnesium are active in the catalytic process. The yield, quality, and carbon‐metal contact were shown to affect hydrogen uptake. Higher pretreatment temperatures enhanced uptake, for both low‐ and high‐pressure measurements, due to increased carbon‐metal contact and activation of the catalyst. At 69 bar (or 1,000 psia), the hydrogen adsorption and desorption of the MWNT/NiMgO system were 3.7% and 3.6%, respectively.