Experimental study on reaction kinetics of stacked aluminum powder with water

doi:10.16265/j.cnki.issn1003-3033.2026.01.1221

Abstract

Abstract:

In order to promote the optimization and upgrading of metal dust explosion-proof technology and establishment of a safety protection and control system, this study systematically investigated the reaction kinetics of aluminum powder with excess water under varying particle sizes and stacking masses, based on the self-developed visualization experimental platform for the reaction between stacked metal dust and water. Through quantitative characterization of the effects of particle size and stacking mass on key reaction parameters-including the maximum temperature, total gas production, maximum hydrogen concentration, maximum pressure, and total reaction time-the kinetic mechanism of the aluminum-water reaction was revealed. The results demonstrate that at a fixed particle size, all characteristic parameters exhibit positive correlations with increasing stacking mass. At a fixed stacking mass, the maximum temperature follows a V-shaped trend (decreasing then increasing) with increasing particle size, while gas production, hydrogen concentration, and pressure show inverted U-shaped trends (increasing then decreasing). Total reaction time increases monotonically with increasing particle sizes. The primary reaction products are Al(OH)₃ and H₂, and the reaction process comprises three distinct stages: slow hydrogen evolution, violent reaction, and attenuation and termination.

Key words: stacked aluminum powder, aluminum-water reaction, reaction kinetics, particle size, stacking mass

CLC Number:

LIU Jiqing, PANG Lei, JIN Longzhe, ZHONG Shengjun, YUAN Chunmiao, WANG Yafei. Experimental study on reaction kinetics of stacked aluminum powder with water[J]. China Safety Science Journal, 2026, 36(1): 138-145.

Figures/Tables 16

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试验编号	铝粉粒径/μm	堆积质量/g	添加水量/g	环境温度/℃
A1	5.24	5	128	40
A2		10
A3		15
B1	15.36	5	128	40
B2		10
B3		15
C1	25.76	5	128	40
C2		10
C3		15

气体	H₂	N₂	O₂	H₂O
采样气体	30.5	55.95	11.2	2.36
标定空气	0.17	82.25	16.1	1.49