Investigation on the improved hydrolysis of aluminum-calcium hydride-salt mixture elaborated by ball milling
Investigation on the improved hydrolysis of aluminum-calcium hydride-salt mixture elaborated by ball milling
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球磨改进铝-氢化钙-盐混合物水解的研究
DOI：
10.1016/j.energy.2015.03.035
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发表时间：
2015-05-01
期刊：
影响因子：
9
通讯作者：
Yan, Mi
中科院分区：
文献类型：
--
作者：
Liu, Yongan;Wang, Xinhua;Yan, Mi
以Al、CaH 2和不同盐类为原料，采用高能球磨法制备了一种新型的铝基制氢材料。对影响Al H2O反应的参数进行了研究和讨论。在添加的盐中，NiCl 2显示出最好的活化能力。CaH_2和NiCl_2的加入量是影响水解过程的重要因素，在水解过程中生成Ca_2Al（OH）（6）Cl（H_2O）（2），有利于副产物层的去除。球磨时间对混合物的产氢性能也有显著影响，球磨时间为3 h时混合物的产氢性能最佳。研磨3 h的Al-10 mol% CaH 2 -10 mol% NiCl 2样品显示出92.1%的氢气产率和1566.3 ml min（-1）g（-1）的mHGR（最大氢气产生速率）。进行了初步研究，以了解优化机制。(C)2015爱思唯尔有限公司版权所有。
A novel Al based hydrogen production material is prepared by high energy ball milling using Al, CaH2 and different salts as the starting materials. The parameters affecting the Al H2O reaction are investigated and discussed. Among the salts added, NiCl2 shows the best activation capability. The addition amount of both CaH2 and NiCl2 is found to be an important factor affecting the hydrolysis process during which a kind of hydrocalumite, Ca2Al(OH)(6)Cl(H2O)(2), is generated and facilitates the removal of the by-product layer. Milling time can also generate significant impacts on the hydrogen generation performances of the mixture and 3 h proves to be the optimum choice in this work. The 3 h milled AI-10 mol% CaH2-10 mol% NiCl2 sample shows a hydrogen yield of 92.1% and mHGR (maximum hydrogen generation rate) of 1566.3 ml min(-1) g(-1). A preliminary study is carried out to understand the optimization mechanisms. (C) 2015 Elsevier Ltd. All rights reserved.