Influence of Particle Size and Heating Rate on Decomposition of BC Dry Chemical Fire Extinguishing Powders

被引：30
作者：
Huang, Dongmei [1 ]
Wang, Xinqun [1 ]
Yang, Jian [1 ]
机构：
[1] China Jiliang Univ, Coll Qual & Safety Engn, Hangzhou 310018, Zhejiang, Peoples R China
来源：
PARTICULATE SCIENCE AND TECHNOLOGY | 2015年 / 33卷 / 05期
基金：
对外科技合作项目（国际科技项目）;
关键词：
BC dry chemical fire extinguishing powders; distribution activation energy model; kinetic study; particle size; thermogravimetric analysis; ACTIVATION-ENERGY MODEL; SOLID-STATE REACTIVITY; SODIUM-BICARBONATE; THERMAL-DECOMPOSITION; PYROLYSIS; KINETICS; K(0)(E); F(E); TG;
D O I：
10.1080/02726351.2015.1013591
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
Pyrolysis of BC dry chemical fire extinguishing powders which are useful for Class B and Class C fires was conducted on a thermogravimetric analyzer with sample loading of 10-25mg under dynamic air atmosphere. The effect of particle sizes (medium value 48.99, 27.24, 4.93 mu m) and heating rates (10, 15, and 20 degrees C min(-1)) were examined. The pyrolysis kinetics of the samples was analyzed using a distribution activation energy model. It was found that the decomposition temperature decreased and the pyrolysis rate increased after the samples were milled. The agglomeration of particles during production did not have an appreciable influence on the pyrolysis process of the samples in our experimental conditions. The activation energy value was 77.13-219.78kJmol(-1), 58.18-288.67kJmol(-1), and 44.59-209.17kJmol(-1) for the powder of particle size 48.99, 27.24, 4.93 mu m. We should use micro powder in fire extinguishing.
引用
收藏
页码：488 / 493
页数：6
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