Generation of hydrogen by aluminium oxidation in aquaeous solutions at low temperatures
Generation of hydrogen by aluminium oxidation in aquaeous solutions at low temperatures
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DOI：
10.1016/j.ijhydene.2015.11.122
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发表时间：
2016-01-30
影响因子：
7.2
通讯作者：
Shkolnikov, E. I.
中科院分区：
文献类型：
--
作者：
Dudoladov, A. O.;Buryakovskaya, O. A.;Shkolnikov, E. I.
由于以下原因，铝与液态水或水溶液在低温下氧化制氢变得复杂。首先，在铝表面形成一层氧化物膜，有效地防止进一步氧化。其次，随着系统温度的降低，铝的氧化速率显著降低。然而，在本研究中，给出了使人们能够克服上述困难的方法。进行了粉末状活性铝在不同水溶液中的氧化实验。所获得的数据已被用于绘制一些曲线，这些曲线表征了氢的流速，这取决于溶液组成和工艺温度（粉末的原始重量为0.25 g，溶液体积为300 ml，测量时间为180分钟）。在-40℃时，KOH溶液中氢气的产率为50 ml， CaCl2产率约为5 ml， ZnCl2产率约为2 ml。- 10℃时，NaOH的产率为264 ml， KOH -产率为260 ml；-20℃：NaOH为100 ml， KOH为225 ml。对于温度为-30℃和-40℃的KOH溶液，产率分别为192和49 ml。在CuCl2（每300毫升溶液2.5克）存在的情况下，用盐酸溶液氧化颗粒状非活性铝（每300毫升溶液2.5克铝），在300分钟内产生超过2000毫升的氢气。对于FeCl3溶液，在180 min内得到的氢的总价值为70 ml，也观察到该溶液部分冻结。版权所有，氢能源出版有限责任公司，爱思唯尔有限公司出版。版权所有。
Hydrogen forming by aluminium oxidation with liquid water of water solutions at low temperatures is complicated by the following reasons. Firstly, on an aluminium surface a film of oxide is formed effectively preventing further oxidation. Secondly, the rate of aluminium oxidation considerably decreases as the temperature of the system decreases.However, in this study the methods are given which enable one to overcome the above difficulties.The experiments on the oxidation of powdered activated aluminium in different water solutions have been carried out. The data obtained have been used to plot a number of curves characterizing hydrogen flow rates depending on the solution composition and the temperature of the process (the original weight of the powder was 0.25 g, solution volume 300 ml, measuring time - 180 min). At -40 degrees C for KOH solution the yield of hydrogen was 50 ml, for CaCl2 - about 5 ml, and for ZnCl2 - approximately 2 ml. At - 10 degrees C H-2 yield for NaOH was 264 ml, for KOH - 260 ml; at -20 degrees C: 100 ml for NaOH, and 225 ml for KOH. For KOH solution at temperatures of -30 degrees C and -40 degrees C the yields were equal to 192 and 49 ml respectively.Oxidation of granulated non-activated aluminium (2.5 g of aluminium per 300 ml of solution) with hydrochloric acid solution in the presence of CuCl2 (2.5 g per 300 ml of solution) resulted in generation of more than 2000 ml of hydrogen during 300 min. For FeCl3 solution the total value of hydrogen obtained during 180 min was equal to 70 ml, it also has been observed partial freezing of this solution. Copyright (C) 2015, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.