(中南大學(xué) 冶金科學(xué)與工程學(xué)院，長(zhǎng)沙 410083)
摘 要: 通過機(jī)械球磨制備一種能快速水解制氫的Al-Ca合金。為了提高該合金的制氫效果，在機(jī)械球磨制備合金的過程中添加NaCl作為Al-Ca合金的活化改性劑，并考察NaCl添加量、機(jī)械球磨時(shí)間和Ca含量等不同因素對(duì)Al-Ca合金的制備及其制氫效果的影響。結(jié)果表明：NaCl的添加能明顯抑制顆粒的團(tuán)聚，提高合金的制氫產(chǎn)率；Al-Ca合金的制氫速率和制氫產(chǎn)率隨合金中NaCl添加量、球磨時(shí)間和Ca含量的提高而逐漸提高。當(dāng)NaCl的添加量為7%時(shí)制備得到Al-20%Ca-7%NaCl合金，將其與水反應(yīng)1 200 s左右時(shí)制氫產(chǎn)率可達(dá)100%。
關(guān)鍵字: Al-Ca合金；制氫；制氫產(chǎn)率；機(jī)械球磨
（School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China）
Abstract:A novel material for fast generating hydrogen by splitting water, Al-Ca alloy, was prepared by mechanical ball-milling. In order to improve the hydrogen generation of alloy, NaCl was added as the activation modifier during the process of ball-milling. The research results show that the addition of NaCl can resist the agglomeration of alloy powder and improve hydrogen yield. The hydrogen generation rate and hydrogen yield increases with increasing NaCl addition, ball-milling time and Ca content. When the addition amount of NaCl is 7%, Al-20%Ca-7%NaCl alloy is prepared, and the hydrogen yield can reach 100% after reacting with water for 1 200 s.
Key words: aluminum-calcium alloy; hydrogen generation; hydrogen yield; ball milling
