Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4926619 | Renewable Energy | 2017 | 8 Pages |
Abstract
This work illustrates the hydrogen storage performance of Zr(V0.95Ni0.05)2 Laves phase alloy in hydrogen with/without gaseous impurities. It is found that Zr(V0.95Ni0.05)2 can be activated in either pure hydrogen or hydrogen with 1.00Â vol% O2. However, the activation of Zr(V0.95Ni0.05)2 in hydrogen with gaseous impurities requires much more time and higher temperature due to the continually forming passivation layer oxides. Hydrogen storage capacity is found to degrade evidently with increasing oxygen content and the alloy almost loses entire hydrogen absorption capacity in hydrogen with 2.00Â vol% O2. During absorption/desorption cycles, the maximum hydrogen capacity against gaseous impurities decreases in various degree comparing to that in pure hydrogen. At the temperature below 423Â K, the hydrogen desorption capacity decreases gradually with increasing absorption/desorption cycles. The alloys can hardly absorb hydrogen in the third cycle both at 308 and 423Â K. With the further increase of temperature, the hydrogen absorption capacity at the first cycle even shows a little rise at 573Â K comparing with that at 308Â K, indicating a strong temperature dependence of the hydrogen storage degradation against gaseous impurities. Both the kinetics and capacity of Zr(V0.95Ni0.05)2 decrease to a certain extent after 3 absorption/desorption cycles at 723Â K.
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Authors
Tiebang Zhang, Tiandong Wu, Xiangyi Xue, Rui Hu, Hongchao Kou, Jinshan Li,