资源描述
,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,Hydrogen Storage Alloy,Hydrogen is a very important secondary source of energy. The key is how the use of hydrogen storage and transport, mainly through a gas of hydrogen, liquid hydrogen and metal hydride. One key type of metal hydride hydrogen storage density of liquid hydrogen with the same or higher, safe, reliable, cheap, is currently a rapid development of hydrogen storage methods. Usually metal hydride hydrogen storage alloy materials, ionic hydrides than that, the high polymeric covalent hydrides, molecular hydride hydrogen storage material more suitable.,Definition of Hydrogen Storage Alloy,Hydrogen Storage Alloy is a kind of alloy which can store hydrogen .,Hydrogen Storage Alloy can,react with hydrogen and generate metal hydride.,It has a high degree of reversibility of absorbing and releasing hydrogen.,Classification of Hydrogen Storage Alloy,Mg based hydrogen storage alloy,Mg based hydrogen storage alloy,is mainly composed of Mg-Ni-Cu system, Mg-Re system, Mg-Ni-Cu-M system (M = Cu, Mn, Ti).,Rare-earth hydrogen storage alloy,LaNi5 three component system,It is mainly composed of LaNi5-xMx and R0.2La0.8Ni5.,MmNi5 system,Scientists replace La from LaNi5 with mixed rare earth elements (Ce , Sm , La) to create MmNi5.,MINi5 system,Scientists use MI(La and Nd-rich mixed rare earth, La + Nd 70% ) to replace La.,Ti based hydrogen storage alloy,It includes two types :Ti-Fe alloys ,Ti-Mn alloys,It can form solid solution containing hydrogen to let hydrogen dissolve in many metal or alloys. The solubility of interstitial its balance is proportional to the square root of hydrogen pressure.,In a certain temperature and pressure condition,solid solution phase has reaction with hydrogen and generates metal hydride .The reactive for,2MHx/(Y-X)+H22MHy/(Y-X)+H,In the reactive, MHy is metal hydride, H is heat of formation. It is by hydrogen storage alloy reacts with hydrogen to store hydrogen in metal hydride. This is a reversible process. Changes in temperature, pressure can respond positively, reverse repeated to achieve material hydrogen and hydrogen functions.,Practical hydrogen storage metals shall meet the following conditions,Large hydrogen absorption capacity,Metal hydride heat of formation should be appropriate,to prevent,metal hydride from too stable,.,The balance of hydrogen pressure,should be appropriate to ease,hydrogen storage and release of hydrogen.,The release of hydrogen and hydrogen storage speed, good heat transfer.,Chemical stability, be reliable, safe and sound,in the storage and transportation.,Cheap.,Application of hydrogen storage materials,1、Heat carrier system,2、Load power system,3、Design and manufacture“Hydrogen Library to store hydrogen,* Instead of cars, trains, aircraft fuel tanks as power source,* As a depot at any time for hydrogen,4、Separation of hydrogen purification,*We can get high purity hydrogen by repeated absorption.,5、Hydrogenation catalyst, to remove dissolved oxygen, hydrogen battery manufacturing,Thank you,
展开阅读全文