制备工艺参数与合金元素对铝(合金)—水(0℃)反应产氢性能的影响

Effects of Preparation Parameters and Alloy Elements on the Hydrogen Generation Performance of Aluminum Alloy- 0 °C Pure Water Reaction

摘要:

通过机械合金化技术制备了含镓和铟的铝合金,研究该合金与纯水之间的水解反应来考察氢产率的变化。X射线衍射、扫描电镜与能谱分析结果表明镓和铟元素分别主要以溶解与沉积相的形式存在于合金之中。溶解的镓和铟通过增强水解反应活性来提高铝合金的产氢率。此外,由球磨时间决定的沉积相的数量及分布也会直接影响合金的产氢率,具有均匀分布及合适数量沉积相的铝合金能与0℃水反应产生1132.8ml/g的氢气。

Abstract:

Aluminum (Al) alloys with gallium (Ga) and indium (In) were prepared via mechanical alloying technology. The hydrolysis reaction between the Al alloys and pure water was studied to observe the hydrogen yield evolution. The results obtained by X-ray diffraction, scanning electron microscopy and energy dispersive spectroscopy show that Ga and In elements mainly exist in the alloy in the forms of dissolution and precipitated phases, respectively. The dissolution of Ga and In can improve the hydrogen yield of Al alloy by enhancing the activity of hydrolysis reaction. Moreover, the quantity and distribution of precipitated phase determined by ball milling time directly influence the hydrogen yields, and the Al alloy with appropriate number and uniform-distributed precipitated phase can react with 0 _oC pure water to produce 1132.8ml/g hydrogen.