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

机译：通过超声制备的Al（OH）3悬浮液促进的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：研究了通过超声制备的Al（OH）_（3）悬浮液促进的Al水反应的动力学。结果发现，随着悬浮浓度，体积和温度的增加，Al水反应开始的诱导时间降低，反应速率随着悬浮浓度，体积和温度而增加，所以Al水反应是放热的。当Al水的重量比增加到1？15时，几乎没有诱导时间，Al（OH）_（3）悬浮液中超过80％的Al在40分钟内消耗，可比较对NaOH解决方案的行为。提出了一种基于褐色运动的碰撞模型来分析反应过程，表明Al和Al（OH）_（3）颗粒之间的接触是控制反应进展的两个关键因素。

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