Issue 42, 2016
From the journal:

RSC Advances

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

Gao-Heng Liang,a   Wei-Zhuo Gai,a   Zhen-Yan Deng,*ab   Pingguang Xuc  and  Zhenxiang Chengbd  

* Corresponding authors

a Energy Materials & Physics Group, Department of Physics, Shanghai University, Shanghai 200444, China
E-mail: zydeng@shu.edu.cn
Fax: +86-21-66134208
Tel: +86-21-66134334

b Shanghai Key Laboratory of High Temperature Superconductors, Shanghai University, Shanghai 200444, China

c Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan

d Institute for Superconducting and Electronic Materials, University of Wollongong, North Wollongong, Wollongong, NSW 2500, Australia

Abstract

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.

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

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Article information

DOI
https://doi.org/10.1039/C6RA01627H
Article type
Paper
Submitted
19 Jan 2016
Accepted
03 Apr 2016
First published
06 Apr 2016
This article is Open Access
Creative Commons BY license

RSC Adv., 2016,6, 35305-35314

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

G. Liang, W. Gai, Z. Deng, P. Xu and Z. Cheng, RSC Adv., 2016, 6, 35305 DOI: 10.1039/C6RA01627H

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