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- W2059586960 abstract "Abstract (2LiNH 2 + MgH 2 ) system is one of the most promising hydrogen storage materials due to its suitable operation temperature and high reversible hydrogen storage capacity. In studies and applications, impurities such as CO, CO 2 , O 2 , N 2 and CH 4 are potential factors which may influence its performance. In the present work, hydrogen containing 1 mol% CO is employed as the hydrogenation gas source, and directly participates in the reaction to investigate the effect of CO on the hydrogen sorption properties of (2LiNH 2 + MgH 2 ) system. The results indicate that the hydrogen capacity of the (Mg(NH 2 ) 2 + 2LiH) system declines from 5 wt.% to 3.45 wt.% after 6 cycles of hydrogenation and dehydrogenation, and can not restore to its initial level when use purified hydrogen again. The hydrogen desorption kinetics decreases obviously and the dehydrogenation activation energy increases from 133.35 kJ/mol to 153.35 kJ/mol. The main reason for these is that two new products Li 2 CN 2 and MgO appear after (2LiNH 2 + MgH 2 ) react with CO. They are formed on the surface of materials particles, which may not only cause a permanent loss of NH 2− , but also prevent the substance transmission during the reaction process. After re-mechanically milling, both kinetics and dehydrogenation activation energy can be recovered to the initial level." @default.
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- W2059586960 date "2014-06-01" @default.
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- W2059586960 title "Effect of CO on hydrogen storage performance of 2LiNH2 + MgH2 system" @default.
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- W2059586960 doi "https://doi.org/10.1016/j.ijhydene.2014.04.055" @default.
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