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Kinetics study of the Al-water reaction promoted by an ultrasonically prepared Al(OH)(3) suspension

机译：超声制备的Al（OH）（3）悬浮液促进Al-水反应的动力学研究

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摘要

The kinetics of the Al-water reaction promoted by an ultrasonically prepared Al(OH)(3) suspension is investigated. It is found that the induction time for the beginning of the Al-water reaction decreases and the reaction rate increases with increasing suspension concentration, volume, and temperature, because the Al-water reaction is exothermic. When the weight ratio of Al to water increases to 1 : 15, there is almost no induction time, and more than 80% of Al in the Al(OH)(3) suspension is consumed within 40 min, which is comparable to the behavior of Al in NaOH solution. A collision model based on Brownian motion is proposed to analyze the reaction process, which shows that the contact between Al and Al(OH)(3) particles and the reaction heat are two key factors that control the reaction progress.
机译：研究了超声制备的Al（OH）（3）悬浮液促进的Al-水反应动力学。已经发现，由于Al-水反应是放热的，因此随着悬浮液浓度，体积和温度的增加，Al-水反应开始的诱导时间减少并且反应速率增加。当铝与水的重量比增加到1:15时，几乎没有诱导时间，并且在40分钟内消耗了Al（OH）（3）悬浮液中超过80％的Al，这与行为可比在NaOH溶液中的铝。提出了一种基于布朗运动的碰撞模型来分析反应过程，该模型表明Al与Al（OH）（3）颗粒的接触以及反应热是控制反应进程的两个关键因素。

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