Effect of alkali metal amides on the improvement of dehydrogenation for the LiH–NH3 system

In this study, the hydrogen desorption properties for the reactions between 1 mol% MNH₂-added (M = Li, Na, and K) lithium hydride and NH₃ (0.5 MPa, NH₃/LiH = 1 mol/mol) at 100 °C were systematically investigated to design a LiH–NH₃ hydrogen storage system with better kinetic properties. It is found...

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Bibliographic Details
Published in:Journal of materials science 2016, Vol.51 (2), p.911-916
Main Authors: Dong, Bao-Xia, Chen, Lin-Ting, Teng, Yun-Lei, Gao, Jing-Jing, Tian, Hui
Format: Article
Language:English
Subjects:
Additives
Alkali metals
Amides
Ammonia
Characterization and Evaluation of Materials
Chemistry and Materials Science
Classical Mechanics
Composition effects
Crystallography and Scattering Methods
Dehydrogenation
Desorption
hydrides
Hydrogen
Hydrogen storage
Kinetics
lithium
Lithium hydrides
Materials Science
Original Paper
Polymer Sciences
potassium
Reaction kinetics
sodium
Solid Mechanics
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Summary:In this study, the hydrogen desorption properties for the reactions between 1 mol% MNH₂-added (M = Li, Na, and K) lithium hydride and NH₃ (0.5 MPa, NH₃/LiH = 1 mol/mol) at 100 °C were systematically investigated to design a LiH–NH₃ hydrogen storage system with better kinetic properties. It is found that all of the alkali metal amide additives can improve the hydrogen desorption kinetics of the LiH–NH₃ system, among which, LiNH₂ shows the best effect. As compared to the other LiNH₂-added composition, the 1 mol% LiNH₂-added composition shows the best effect on improving the desorption kinetics of the LiH–NH₃ system. According to the kinetic analysis, it is proposed that the effect of LiNH₂ on the hydrogen desorption kinetics would be mainly due to physical effect.
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-015-9419-9