کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1280813 | 1497694 | 2006 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Hydrogen absorption and desorption characteristics in the La0.5Ni1.5Mg17 prepared by hydriding combustion synthesis
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Hydrogen absorption and desorption characteristics in the La0.5Ni1.5Mg17 prepared by hydriding combustion synthesis Hydrogen absorption and desorption characteristics in the La0.5Ni1.5Mg17 prepared by hydriding combustion synthesis](/preview/png/1280813.png)
چکیده انگلیسی
The La0.5Ni1.5Mg17 alloy prepared by hydriding combustion synthesis (HCS) was investigated by an isovolumetric method and X-ray diffraction and this alloy has a large hydrogen storage capacity with good hydriding/dehydriding (H/D) kinetics. The kinetics of hydrogen absorption/desorption (A/D) in the two-phase (α-β) region has been studied between 523 and 573 K under approximately isobaric conditions and the experimental data were analyzed to find the kinetics mechanisms for both the H/D processes. It is shown that the rate-controlling step of the H/D processes is the diffusion of hydrogen, due to the good agreement between the experimental results and calculated curves using a simple new kinetic model. The activation energies are calculated to be 86.8 kJ/mol H2 for absorption and 84.9 kJ/mol H2 for desorption, which were much smaller than that of MgH2, and can be attributed to the La and Ni additions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 31, Issue 4, March 2006, Pages 497-503
Journal: International Journal of Hydrogen Energy - Volume 31, Issue 4, March 2006, Pages 497-503
نویسندگان
Qian Li, Kuo-chih Chou, Kuang-di Xu, Li-jun Jiang, Qin Lin, Gen-wen Lin, Xiong-gang Lu, Jie-yu Zhang,