铝锡复合材料水解制氢性能研究

摘要

研究了铝锡复合材料与纯水反应过程中的产氢特性.所提及的铝锡复合材料全部采用机械球磨的方法制备而成.不同成分复合材料的相组成和表面形貌分别用X射线衍射仪(XRD)和扫描电子显微镜(SEM)进行表征.研究结果表明,增加金属Sn的含量、提高起始反应温度、添加助磨剂NaCl和添加低熔点金属(Bi、In等),可以提高铝锡复合材料的活性,增加产氢量以及产氢速率.通过调整添加剂种类和添加量得到成分比例(质量分数)为Al-6%Sn-2%Bi-2%In的合金在25 ℃的水浴中水解30 min的产氢量为785.6 mL/g,最大产氢速率可以达到175 mL/(min·g).%The hydrogen production of aluminum-tin(Al-Sn) composites in pure water was studied in this paper.The aluminum-tin(Al-Sn) composites mentioned in this paper were made by mechanical alloying.X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used for the phase composition and microstructure.The result shows that the hydrogen production and hydrogen generation rate of Al-Sn composites can be improved by increasing the Sn content, improving the initial water temperature, adding grinding aid (NaCl) and low melting point (Bi, In etc.) by improving the activity of Al-Sn composites.The optimized percentage(wt%) Al-6%Sn-2%Bi-2%In composite by adjusting the types and contents of additives shows higher hydrogen production and hydrogen production rate, which reaches 785.6 mL/g and 175 mL/(min·g) in the pure water at 25 ℃.