Simultaneous determination of ammonia emission and hydrogen capacity variation during the cyclic testing for LiNH2-LiH hydrogen storage system
Simultaneous determination of ammonia emission and hydrogen capacity variation during the cyclic testing for LiNH2-LiH hydrogen storage system
复制标题
LiNH2-LiH储氢系统循环试验过程中氨排放量和氢容量变化的同时测定
DOI：
10.1016/j.ijhydene.2008.08.003
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发表时间：
2008
影响因子：
7.2
通讯作者：
T. Kiyobayashi
中科院分区：
文献类型：
--
作者：
Shingo Ikeda;N. Kuriyama;T. Kiyobayashi
研究了 LiNH2-LiH 系统的氢解吸和吸收循环。我们设计了一种方法，可以同时测量氢气容量和氢气解吸过程中作为副产品从系统中排放的氨量。约的初始氢容量。 5mass% 呈指数下降至约。 573K 200次循环后为2mass%，其中一次循环包括真空脱氢3h和3MPa纯氢吸氢2h。解吸氢气中的氨浓度随着重复循环而逐渐增加，并在 100 次循环后通过重新混合样品而突然下降。通过将观察到的氢容量衰减率与平均氨浓度0.24±0.05mol%(NH3/H2)进行比较，我们发现大约一半的氢容量衰减可以用氨排放造成的氮成分损失来解释。
The hydrogen desorption and absorption cycles of the LiNH2–LiH system were investigated. We have devised a method to simultaneously measure the hydrogen capacity and the amount of ammonia emitted from the system as a by-product during the hydrogen desorption. The initial hydrogen capacity of ca. 5mass% exponentially decreased to ca. 2mass% after 200 cycles at 573K in which one cycle comprises the hydrogen desorption in vacuo for 3h and the hydrogen absorption under 3MPa of pure hydrogen for 2h. The ammonia concentration in the desorbed hydrogen gradually increased with repeated cycling and abruptly dropped by re-mixing the sample after 100 cycles. By comparing the observed decay rate in hydrogen capacity with the mean ammonia concentration of 0.24±0.05mol%(NH3/H2), we found that about half the decay in hydrogen capacity can be explained by the loss of the constituent nitrogen due to the ammonia emission.
影响因子：
15
作者：
David, William I. F.;Jones, Martin O.;Edwards, Peter P.
通讯作者：
Edwards, Peter P.