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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Effect of LaNi_5H_6 hydride particles size on desorption kinetics
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Effect of LaNi_5H_6 hydride particles size on desorption kinetics

机译：LaNi_5H_6氢化物粒径对解吸动力学的影响

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摘要

The H_2 desorption rate of laNi_5H_6 hydride was measured as a function of the size distribution of LaNi_5 particles and the number (N) of cyclic hydriding and dehydriding reactions by a volumetric method at 298 K. The measured data showed that the rate of H_2 desorption depends on N, i.e. the particle size. The H_2 desorption rate increased as N increased from N = 10, to 30 to 100, and as the particle size decreased. The measured desorption curves were found to be diffusion controlled. By fitting a diffusion equation to the measured curves, apparent diffusion coefficients of 1.8 X 10~(-9) cm~2/s at 298 K were obtained for LaNi_5H_6 hydride with a median particle sizes of between N = 10 (18 #mu# m).
机译：在298 K下，通过体积法测量了laNi_5H_6氢化物的H_2解吸速率与LaNi_5颗粒尺寸分布以及循环氢化和脱水反应的数量（N）的函数。测量数据表明，H_2解吸速率取决于在N上，即粒径。 H 2的解吸速率随着N从N = 10增大到30到100以及粒径减小而增加。发现测得的解吸曲线是受扩散控制的。通过将扩散方程拟合到测量曲线，对于LaNi_5H_6氢化物的中值粒径为N = 10（18＃mu＃），在298 K下的表观扩散系数为1.8 X 10〜（-9）cm〜2 / s。 m）。

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