کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1278701 | 1497572 | 2011 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Improvement in the hydrogen storage properties of Mg by mechanical grinding with Ni, Fe and V under H2 atmosphere Improvement in the hydrogen storage properties of Mg by mechanical grinding with Ni, Fe and V under H2 atmosphere](/preview/png/1278701.png)
Mg-5wt%Ni-2.5wt%Fe-2.5wt%V (named Mg-5Ni-2.5Fe-2.5V) powder was prepared by reactive mechanical grinding using a planetary ball mill. The activation process, the changes in phase and microstructure with hydriding-dehydriding cycling, and the variations in the hydriding and dehydriding rates with temperature were investigated. The rate-controlling step for the dehydriding reaction of Mg-5Ni-2.5Fe-2.5V was analyzed by using a spherical moving boundary model. As the temperature increased from 473 K through 623 K, the initial hydrogen absorption rate under 12 bar H2 decreased, while the hydrogen desorption rate under 1.0 bar H2 increased.
► 10 wt% of Ni, Fe, and V addition to improve the reaction rates of Mg with H2.
► Investigation of variations in hydriding and dehydriding rates with temperature.
► With increase in temperature, decrease in the initial hydrogen absorption rate.
► Analysis of rate-controlling step for the dehydriding reaction.
Journal: International Journal of Hydrogen Energy - Volume 36, Issue 21, October 2011, Pages 13587–13594