Dan Xu; Winston Duo Wu
Abstract
Hydrogen is one of the most promising clean energy because it has a much higher energy density than gasoline and emits no carbon dioxide after burning. For the application of hydrogen, hydrogen storage is considered as a key technology. Design and synthesis of porous material with high hydrogen storage ...
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Hydrogen is one of the most promising clean energy because it has a much higher energy density than gasoline and emits no carbon dioxide after burning. For the application of hydrogen, hydrogen storage is considered as a key technology. Design and synthesis of porous material with high hydrogen storage capacity should be fully developed at first. However, none of the candidate materials developed so far has meet the DOE target yet. This review aimed to describe the presently major accomplishments and the challenges in the area of hydrogen storage.
Ankur Jain; Pragya Jain; Shivani Agarwal; Paola Gislon; Pier Paolo Prosini; I.P. Jain
Abstract
Magnesium hydride is a promising material for hydrogen storage due to its high storage capacity i.e.7.6wt%. But its high stability i.e. high desorption temperature (~350? o C) limits its practical application towards hydrogen economy. Moreover the kinetics is also too slow even at high temperatures. ...
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Magnesium hydride is a promising material for hydrogen storage due to its high storage capacity i.e.7.6wt%. But its high stability i.e. high desorption temperature (~350? o C) limits its practical application towards hydrogen economy. Moreover the kinetics is also too slow even at high temperatures. Composite formation with Zr based laves phase alloys, especially ZrCr2 family, is an effective method to improve the hydriding properties of MgH2. This work presents the synthesis, structural, morphological, and hydrogenation properties of Mg-x wt% ZrCrMn composites. Both phases i.e. Mg & ZrCrMn remain their presence after milling and several hydriding cycles as well. SEM results suggest the homogeneous distribution of alloy particles on Mg matrix. Pressure composition temperature (PCT) analysis shows a reduction in desorption temperature down to 250 o C for these composites. TG experiments suggest a total hydrogen capacity of 5.9% and 4.35% for x =25, 50 in Mg-x wt% ZrCrMn composites respectively. The enthalpy of hydride formation is also calculated using Van’t Hoff plots, which is found similar to the parent material i.e. MgH2. A remarkable enhancement in the kinetics of hydrogen absorption / desorption is reported here by forming these composites.
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