Journal
APPLIED ENERGY
Volume 145, Issue -, Pages 27-35Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.apenergy.2015.02.010
Keywords
Hydrogen storage; Metal hydride bed; ZrCo; Depleted uranium; Operation conditions
Categories
Funding
- National Magnetic Confinement Fusion Science Program of China [2011GB111003]
- Open Project of State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials [113zxfk02]
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Metal hydride bed is an important component for the deuterium-tritium fusion energy under development in International Thermonuclear Experimental Reactor (ITER), in which the hydrogen recovery and delivery properties are influenced by the bed configuration, operation conditions and the hydrogen storage materials contained in the bed. In this work, a thin double-layered annulus bed configuration was adopted and full-scale beds loaded with ZrCo and depleted uranium (DU) for fast recovery and delivery of hydrogen isotopes were fabricated. The properties of hydrogen recovery/delivery together with the inner structure variation in the fabricated beds were systematically studied. The effects of operation conditions on the performances of the bed were also investigated. It was found that both of the fabricated ZrCo and DU beds were able to achieve the hydrogen storage target of 17.5 mol with fast recovery rate. In addition, experimental results showed that operation of employing extra buffer vessel and scroll pump could not only promote the hydrogen delivery process but also reduce the possibility about disproportionation of ZrCo. Compared with ZrCo bed, DU bed exhibited superior hydrogen delivery performances in terms of fast delivery rate and high hydrogen delivery amount, which,could deliver over 16.4 mol H-2 (93.7% of recovery amount) within 30 min at the average delivery rate of 20 Pa m(3)/s. Good reversibility as high as 10 cycles without obvious degradation tendency in both of hydrogen delivery amount and delivery rate for DU bed was also achieved in our study. It was suggested that the fabricated thin double-layered annulus DU bed was a good candidate to rapidly deliver and recover massive hydrogen isotopes for fusion energy application. (C) 2015 Elsevier Ltd. All rights reserved.
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