Oxidation kinetics regularity in spontaneous combustion of gas coal

被引：22

作者：

WANG L. ^{[1
,2
]}

JIANG S. ^{[1
,2
]}

WU Z. ^{[2
]}

SHAO H. ^{[1
,2
]}

ZHANG W. ^{[1
,2
]}

CHEN Y. ^{[1
,2
]}

ZOU L. ^{[1
,2
]}

机构：

[1] State Key Laboratory of Coal Resources and Mine Safety, China University of Mining and Technology, Xuzhou

[2] School of Safety Engineering, China University of Mining and Technology, Xuzhou

来源：

Mining Science and Technology | 2010年 / 20卷 / 01期

关键词：

active energy; isokinetic temperature; kinetic compensation effect; reaction order; static oxygen consumption test system;

D O I：

10.1016/S1674-5264(09)60161-7

中图分类号：

学科分类号：

摘要：

In order to investigate the oxidation kinetics of gas coal at low temperatures, we derived a rate equation of oxygen consumption during low-temperature oxidation of gas coal and deduced an E-c equation, expressing the relation between active energy E and oxygen concentration c. The reaction order n and active energy E were calculated with this equation based on experiments of static oxygen consumption tests. In addition, we proved the rationality of the E-c equation using a kinetic compensation effect and obtained the isokinetic temperature Tc. The results show that: 1) the gas coal oxidizes easily with increasing temperature and the oxidation tends to be spontaneous at higher temperatures; 2) the oxygen concentration c affects oxygen consumption very much at lower temperatures but has only a small effect at higher temperatures; 3) the isokinetic temperature Tc was 127 °C which has been experimentally validated as the key turning point during low-temperature spontaneous combustion of gas coal. © 2010 China University of Mining and Technology.

引用

页码：59 / 63

页数：4

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