Effect of alkali metal amides on the improvement of dehydrogenation for the LiH–NH₃system

Bao-Xia Dong• Lin-Ting Chen•Yun-Lei Teng• Jing-Jing Gao• Hui Tian

School of Chemistry and Chemical Engineering, Yangzhou University

Abstract: 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^oC were systematically investigated to design a LiH–NH₃hydrogen 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–NH₃system, among which, LiNH₂shows 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–NH₃system. According to the kinetic analysis, it is proposed that the effect of LiNH₂on the hydrogen desorption kinetics would be mainly due to physical effect.

Journal of Material Science, 2016, 51, 911–916

文章链接：http://link.springer.com/article/10.1007%2Fs10853-015-9419-9