Abstract
Ball-milled hydrogenated graphite-iron materials have attracted interest as possible hydrogen storage media because of theoretically estimated hydrogen capacities of about 10wt%. However, such a value needs to be experimentally verified. In this work, graphite-0.5wt% Fe was milled under 3bar hydrogen in a tungsten carbide milling pot. The effect of iron on the microstructure and hydrogen storage properties of milled graphite was investigated by thermal gravimetric analysis-mass spectrometry, X-ray diffraction, and transmission electron microscopy. When a 10-hour milled graphite with 0.5wt% Fe sample was heated under argon to 990°C, 9.6wt% of hydrogen was released, which is almost double than that for a graphite sample with no iron (5.5wt% hydrogen). The addition of iron also was found to reduce the onset temperature of hydrogen desorption by 50 to 350°C. However, for a longer milling time of 40hours, the amount of hydrogen desorbed for graphite-0.5wt% Fe decreased, and methane also was detected. The results suggest that iron carbide produced during milling plays a catalytic role, increasing the hydrogen storage capacity and lowering the onset temperature of hydrogen desorption.
| Original language | English |
|---|---|
| Pages (from-to) | 720-725 |
| Number of pages | 6 |
| Journal | International Journal of Energy Research |
| Volume | 37 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - 2013 Jun 10 |
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Keywords
- Ball milling
- Graphite
- Graphite-iron
- Hydrogen
- Hydrogen storage
- Iron carbide
- Methane
- Milling time
ASJC Scopus subject areas
- Energy Engineering and Power Technology
- Fuel Technology
- Nuclear Energy and Engineering
- Renewable Energy, Sustainability and the Environment
Cite this
Hydrogen storage properties of ball-milled graphite with 0.5wt% Fe. / Zhang, Yinghe; Book, David.
In: International Journal of Energy Research, Vol. 37, No. 7, 10.06.2013, p. 720-725.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Hydrogen storage properties of ball-milled graphite with 0.5wt% Fe
AU - Zhang, Yinghe
AU - Book, David
PY - 2013/6/10
Y1 - 2013/6/10
N2 - Ball-milled hydrogenated graphite-iron materials have attracted interest as possible hydrogen storage media because of theoretically estimated hydrogen capacities of about 10wt%. However, such a value needs to be experimentally verified. In this work, graphite-0.5wt% Fe was milled under 3bar hydrogen in a tungsten carbide milling pot. The effect of iron on the microstructure and hydrogen storage properties of milled graphite was investigated by thermal gravimetric analysis-mass spectrometry, X-ray diffraction, and transmission electron microscopy. When a 10-hour milled graphite with 0.5wt% Fe sample was heated under argon to 990°C, 9.6wt% of hydrogen was released, which is almost double than that for a graphite sample with no iron (5.5wt% hydrogen). The addition of iron also was found to reduce the onset temperature of hydrogen desorption by 50 to 350°C. However, for a longer milling time of 40hours, the amount of hydrogen desorbed for graphite-0.5wt% Fe decreased, and methane also was detected. The results suggest that iron carbide produced during milling plays a catalytic role, increasing the hydrogen storage capacity and lowering the onset temperature of hydrogen desorption.
AB - Ball-milled hydrogenated graphite-iron materials have attracted interest as possible hydrogen storage media because of theoretically estimated hydrogen capacities of about 10wt%. However, such a value needs to be experimentally verified. In this work, graphite-0.5wt% Fe was milled under 3bar hydrogen in a tungsten carbide milling pot. The effect of iron on the microstructure and hydrogen storage properties of milled graphite was investigated by thermal gravimetric analysis-mass spectrometry, X-ray diffraction, and transmission electron microscopy. When a 10-hour milled graphite with 0.5wt% Fe sample was heated under argon to 990°C, 9.6wt% of hydrogen was released, which is almost double than that for a graphite sample with no iron (5.5wt% hydrogen). The addition of iron also was found to reduce the onset temperature of hydrogen desorption by 50 to 350°C. However, for a longer milling time of 40hours, the amount of hydrogen desorbed for graphite-0.5wt% Fe decreased, and methane also was detected. The results suggest that iron carbide produced during milling plays a catalytic role, increasing the hydrogen storage capacity and lowering the onset temperature of hydrogen desorption.
KW - Ball milling
KW - Graphite
KW - Graphite-iron
KW - Hydrogen
KW - Hydrogen storage
KW - Iron carbide
KW - Methane
KW - Milling time
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UR - http://www.scopus.com/inward/citedby.url?scp=84878197932&partnerID=8YFLogxK
U2 - 10.1002/er.1903
DO - 10.1002/er.1903
M3 - Article
AN - SCOPUS:84878197932
VL - 37
SP - 720
EP - 725
JO - International Journal of Energy Research
JF - International Journal of Energy Research
SN - 0363-907X
IS - 7
ER -