TY - JOUR
T1 - Effect of Oxygen on the Mg-H Reaction
AU - Vigeholm, B.
AU - Kjøller, John
AU - Larsen, Bent
AU - Pedersen, Allan Schrøder
PY - 1984
Y1 - 1984
N2 - Two identical samples of magnesium powder (purity, 99.58%) were hydrogenated at approximately 30 bar and 380 °C and dehydrogenated under vacuum at the same temperature about 500 times. The first sample was exposed to pure hydrogen (purity, 99.9999%) and the second was exposed to hydrogen containing 85 ppm O and 8 ppm H2O vapour. In both experiments a moderate overall reduction in the amount of hydrogen absorbed and desorbed was observed. This can be ascribed to a reduced absorption rate with increased number of cycles. The effect of oxygen was negligible, and this was confirmed by a precision absorption measurement performed after the cycling experiment. Despite the decreased absorption rate, which was mainly observed at higher degrees of reaction, little change in the desorption kinetics was observed.
AB - Two identical samples of magnesium powder (purity, 99.58%) were hydrogenated at approximately 30 bar and 380 °C and dehydrogenated under vacuum at the same temperature about 500 times. The first sample was exposed to pure hydrogen (purity, 99.9999%) and the second was exposed to hydrogen containing 85 ppm O and 8 ppm H2O vapour. In both experiments a moderate overall reduction in the amount of hydrogen absorbed and desorbed was observed. This can be ascribed to a reduced absorption rate with increased number of cycles. The effect of oxygen was negligible, and this was confirmed by a precision absorption measurement performed after the cycling experiment. Despite the decreased absorption rate, which was mainly observed at higher degrees of reaction, little change in the desorption kinetics was observed.
U2 - 10.1016/0022-5088(84)90450-8
DO - 10.1016/0022-5088(84)90450-8
M3 - Journal article
SN - 0925-8388
VL - 104
SP - 141
EP - 148
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
IS - 1
ER -