National Institute for Research and Development for Cryogenic and Isotopic Technologies, P.O Râureni, P.O. Box 7, 240050 Rm. Valcea, Romania.
J Hazard Mater. 2012 Mar 30;209-210:501-9. doi: 10.1016/j.jhazmat.2012.01.064. Epub 2012 Jan 25.
A simple method with high efficiency for generating high pure hydrogen by hydrolysis in tap water of highly activated aluminum dross is established. Aluminum dross is activated by mechanically milling to particles of about 45 μm. This leads to removal of surface layer of the aluminum particles and creation of a fresh chemically active metal surface. In contact with water the hydrolysis reaction takes place and hydrogen is released. In this process a Zero Waste concept is achieved because the other product of reaction is aluminum oxide hydroxide (AlOOH), which is nature-friendly and can be used to make high quality refractory or calcium aluminate cement. For comparison we also used pure aluminum powder and alkaline tap water solution (NaOH, KOH) at a ratio similar to that of aluminum dross content. The rates of hydrogen generated in hydrolysis reaction of pure aluminum and aluminum dross have been found to be similar. As a result of the experimental setup, a hydrogen generator was designed and assembled. Hydrogen volume generated by hydrolysis reaction was measured. The experimental results obtained reveal that aluminum dross could be economically recycled by hydrolysis process with achieving zero hazardous aluminum dross waste and hydrogen generation.
建立了一种通过水解高活性铝渣在自来水中高效生产高纯度氢气的简单方法。铝渣通过机械研磨成约 45μm 的颗粒来激活。这导致去除了铝颗粒的表面层并产生了新的化学活性金属表面。与水接触时，水解反应发生并释放氢气。在这个过程中，实现了零废物的概念，因为反应的另一个产物是氢氧化铝（AlOOH），它是环保的，可以用来制造高质量的耐火材料或铝酸钙水泥。为了进行比较，我们还使用了与铝渣含量相似的纯铝粉和碱性自来水溶液（NaOH、KOH）。发现纯铝和铝渣水解反应中产生的氢气速率相似。根据实验装置，设计并组装了一台氢气发生器。测量了水解反应产生的氢气体积。实验结果表明，通过水解过程可以经济地回收铝渣，实现零危险铝渣废物和氢气生成。
