煤自燃机制的TG-FTIR研究

doi:10.16265/j.cnki.issn1003-3033.2019.12.008

中国安全科学学报 ›› 2019, Vol. 29 ›› Issue (12): 46-52.doi: 10.16265/j.cnki.issn1003-3033.2019.12.008

煤自燃机制的TG-FTIR研究

朱建芳^1,2 教授, 申嘉辉^1,2, 宋富美^1,2, 邓会东³

1 河北省矿井灾害防治重点实验室,河北廊坊 065201;
2 华北科技学院安全工程学院,河北廊坊 065201;
3 山西潞安集团左权阜生煤业有限公司,山西晋中 032600

收稿日期:2019-09-07 修回日期:2019-11-12 出版日期:2019-12-28 发布日期:2020-11-24
作者简介:朱建芳 (1971—),男,河北永年人,博士,教授,主要从事矿井火灾、瓦斯防治研究。E-mail:bj_zjf@126.com。
基金资助:
河北省自然科学基金资助(E2018508089);中央高校基本科研业务费资助(3142015021,3142014124)。

TG-FTIR study on coal spontaneous combustion mechanism

ZHU Jianfang ^1,2, SHEN Jiahui ^1,2, SONG Fumei^1,2, DENG Huidong³

1 Hebei Provincial Key Lab of Mine Disaster Prevention and Control, Langfang Hebei 065201, China;
2 School of Safety Engineering, North China Institute of Science and Technology, Langfang Hebei 065201, China;
3 Shanxi Lu'an Mining Zuoquan Fusheng Mining Industry Co. Ltd., Jinzhong Shanxi 032600, China

Received:2019-09-07 Revised:2019-11-12 Online:2019-12-28 Published:2020-11-24

摘要/Abstract

摘要： 为研究煤自燃发生发展过程中煤分子结构变化特征,以阜生矿15号煤为例,分析中硫含量煤样的自燃机制。采用热重-傅里叶红外光谱(TG-FTIR)试验,得到不同热失重阶段特征温度以及相应阶段内发生反应的煤分子结构和分解温度;分析原始煤样官能团分布特征和不同温度煤样官能团含量随温度的变化特征,得出5种煤分子结构官能团组成及含量。研究表明:低温氧化过程中,阜生煤样关键反应温度范围为130～170 ℃;自燃原因为煤样中硫份的存在以及C-H键和C-O/C-O-C键氧化,提高了煤分子结构的化学活性,促进了煤自燃发生。

关键词: 煤自燃, 煤氧复合反应, 低温氧化, 热重-傅里叶红外光谱(TG-FTIR), 煤分子结构, 官能团

Abstract: In order to study change features of coal molecular structure at occurrence and during development of its spontaneous combustion, with No. 15 coal in Fusheng Mine as an example, the spontaneous combustion mechanism of coal samples with medium sulfur content was analyzed. Firstly, TG-FTIR experiment was conducted to obtain characteristic temperature at different thermal weight loss stages and molecular structure and decomposition temperature of coals that reacted during corresponding stages. Then, analysis was made on distribution characteristics of functional groups of raw coal samples and variation in content of functional groups along with temperature change, and composition and content of functional groups of five coal molecular structures were obtained. The results show that critical reaction temperature range of Fusheng coal samples is 130-170 ℃ during low-temperature oxidation, and presence of sulfur in coal samples and oxidation of C-H and C-O / C-O-C bonds improve chemical activity of coal molecular structure, thus causing spontaneous combustion.

Key words: coal spontaneous combustion, coal oxygen reaction, low-temperature oxidation, thermogravimetric-Fourier transform infrared spectroscopy (TG-FTIR), coal molecular structure, functional group

中图分类号:

X932

朱建芳, 申嘉辉, 宋富美, 邓会东. 煤自燃机制的TG-FTIR研究[J]. 中国安全科学学报, 2019, 29(12): 46-52.

ZHU Jianfang , SHEN Jiahui , SONG Fumei, DENG Huidong. TG-FTIR study on coal spontaneous combustion mechanism[J]. China Safety Science Journal, 2019, 29(12): 46-52.

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煤自燃机制的TG-FTIR研究

TG-FTIR study on coal spontaneous combustion mechanism

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