TY - JOUR
T1 - Effects of microwave irradiation on metal hydrides and complex hydrides
AU - Nakamori, Y.
AU - Matsuo, M.
AU - Yamada, K.
AU - Tsutaoka, T.
AU - Orimo, S.
N1 - Funding Information:
This work is the Collaborative Research in Center for Interdisciplinary Research, the Inter-University Cooperative Research Program of the Institute for Materials Research, Tohoku University. This study was partially supported by the Ministry of Education, Science, Sports and Culture, Grant-in-Aid “#18070001”, “Scientific Research (A), #18206073” and by Japan Science and Technology Agency, promotion of seed program.
PY - 2007/10/31
Y1 - 2007/10/31
N2 - Effects of single-mode microwave irradiation on metal hydrides, MHn (LiH, MgH2, CaH2, TiH2, VH0.81, ZrH2, and LaH2.48) and complex hydrides MBH4 (LiBH4, NaBH4, and KBH4) were systematically investigated. Among the metal hydrides, TiH2, VH0.81, ZrH2, and LaH2.48 exhibit a rapid heating by microwave irradiation, where small amount of hydrogen (less than 0.5 mass%) are desorbed. On the other hand, LiBH4 is heated above 380 K by microwave irradiation, where 13.7 mass% of hydrogen is desorbed. The rapid heating of metal hydrides such as TiH2, VH0.81, ZrH2, and LaH2.48 are mainly due to the conductive loss. Meanwhile the microwave heating in LiBH4 is attributed to the conductive loss which is caused by a structural transition. The difference in the amount of desorbed hydrogen between metal hydrides and complex hydrides might be caused by the different microwave penetration depth and/or the temperature saturation in the microwave irradiation process. Microwave heating might be applied to hydrogen storage system, though further development of hydrides themselves and engineering techniques are required.
AB - Effects of single-mode microwave irradiation on metal hydrides, MHn (LiH, MgH2, CaH2, TiH2, VH0.81, ZrH2, and LaH2.48) and complex hydrides MBH4 (LiBH4, NaBH4, and KBH4) were systematically investigated. Among the metal hydrides, TiH2, VH0.81, ZrH2, and LaH2.48 exhibit a rapid heating by microwave irradiation, where small amount of hydrogen (less than 0.5 mass%) are desorbed. On the other hand, LiBH4 is heated above 380 K by microwave irradiation, where 13.7 mass% of hydrogen is desorbed. The rapid heating of metal hydrides such as TiH2, VH0.81, ZrH2, and LaH2.48 are mainly due to the conductive loss. Meanwhile the microwave heating in LiBH4 is attributed to the conductive loss which is caused by a structural transition. The difference in the amount of desorbed hydrogen between metal hydrides and complex hydrides might be caused by the different microwave penetration depth and/or the temperature saturation in the microwave irradiation process. Microwave heating might be applied to hydrogen storage system, though further development of hydrides themselves and engineering techniques are required.
KW - Dielectric response
KW - Gas-solid reaction
KW - Hydrogen absorbing materials
KW - X-ray diffraction
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U2 - 10.1016/j.jallcom.2007.03.096
DO - 10.1016/j.jallcom.2007.03.096
M3 - Article
AN - SCOPUS:35148819351
SN - 0925-8388
VL - 446-447
SP - 698
EP - 702
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
ER -