期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 649, 期 -, 页码 801-808出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2015.07.196
关键词
Ti-Cr-V; Composite; Hydrogen absorption; Kinetics; Hydrogen desorption
资金
- Hydrogen Energy Project, Bhabha Atomic Research Centre, Mumbai
In the present work, hydrogen storage properties of Ti0.32Cr0.43V0.25 alloy and its composite with TiMn2 have been studied. The alloy and the composites have been evaluated for their structures, pressure composition isotherms, hydrogen storage capacity, kinetics of hydrogen absorption and hydrogen desorption temperatures. Ti0.32Cr0.43V0.25 alloy shows maximum 3.33, 1.82 and 1.30 wt. % hydrogen storage capacities at 303, 348 and 423 K, respectively. (Ti0.32Cr0.43V0.25) 0.95(TiMn2)(0.05) composite absorbs maximum 2.90, 1.80 and 1.40 wt. % of hydrogen at 303, 348 and 423 K, respectively. Kinetic study shows that the hydrogen absorption rate is faster for the composites at the initial chemical reaction stage, and later in hydrogen diffusion stage the hydrogen absorption rate decreases. The saturated composite hydrides show additional hydrogen desorption peak at lower temperature, which is important for practical application. (C) 2015 Elsevier B.V. All rights reserved.
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