Law of gas production during coal heating oxidation

被引：29
作者：
Dong, Xianwei [1 ,2 ]
Wen, Zhichao [1 ,2 ]
Wang, Fusheng [1 ,2 ]
Meng, Yaning [1 ,2 ]
机构：
[1] North China Univ Sci & Technol, Sch Min Engn, Tangshan 063210, Peoples R China
[2] Key Lab Min Dev & Safety Technol Hebei Prov, Tangshan 063210, Peoples R China
来源：
INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY | 2019年 / 29卷 / 04期
基金：
中国国家自然科学基金;
关键词：
Heating and oxidation; Metamorphic degree of coal; Oxidizing ability; Gas chromatography;
D O I：
10.1016/j.ijmst.2019.06.011
中图分类号：
TD [矿业工程];
学科分类号：
0819 ;
摘要：
Coal spontaneous combustion is a great threat to mine safety, and gas is the key index to describe coal spontaneous combustion. Taking the coal samples of different kinds of coal as research object, the temperature programmed oxidation experiment was carried out, and the gases produced by coal samples at different temperatures were collected and analyzed by gas chromatography. This research studied the variation characteristics of gas species and gas concentrations in different coal samples during heating oxidation. The experimental results show that different coal samples produce different kinds of gases in the process of heating and oxidation. The order of gas production is CO, C2H6, C2H4, C3H8, and the relationship between gas production and temperature is approximately exponential. With the increase of coal metamorphic degree, the turning point temperature of sharp rise in coal sample gas production rate become higher, the oxidation ability of coal sample decreases, and the quantity of gas production decreases during the same time period. (C) 2019 Published by Elsevier B.V. on behalf of China University of Mining & Technology.
引用
收藏
页码：617 / 620
页数：4
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