TERAHERTZ MEASUREMENT OF INDICATOR GAS EMISSION FROM COAL SPONTANEOUS COMBUSTION AT LOW TEMPERATURE

被引：13

作者：

Wang, Yan-Ming ^{[1
]}

Wang, Wen-Zheng ^{[1
]}

Shao, Zhen-Lu ^{[2
]}

Wang, De-Ming ^{[2
]}

Shi, Guo-Qing ^{[3
]}

机构：

[1] China Univ Min & Technol, Sch Safety Engn, Xu Zhou City, Peoples R China

[2] State Key Lab Coal Resources & Safe Min, Xu Zhou City, Peoples R China

[3] Key Lab Gas & Fire Control Coal Mines, Xu Zhou City, Peoples R China

来源：

ECOLOGICAL CHEMISTRY AND ENGINEERING S-CHEMIA I INZYNIERIA EKOLOGICZNA S | 2013年 / 20卷 / 04期

基金：

中国国家自然科学基金;

关键词：

coal spontaneous combustion; gas monitoring; carbon monoxide; sulphur dioxide; terahertz spectroscopy technique; TIME-DOMAIN SPECTROSCOPY; EASTERN KENTUCKY; WASTE; FIRES;

D O I：

10.2478/eces-2013-0049

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Coal spontaneous combustion is an extremely complicated physical and chemical changing process. In order to improve the indicator gases detection technology and coal spontaneous combustion monitoring, a novel forecast method for toxic gases emission from coal oxidation at low temperature is presented in this paper. The experiment system is setup combined with frequency-domain terahertz technology and coal temperature programming device. The concentration curves of carbon monoxide and sulphur dioxide gases from coal spontaneous combustion are estimated according to molecule terahertz spectra. The influences of coal rank and oxygen supply on coal spontaneous combustion characteristics are discussed. Both carbon monoxide and sulphur dioxide gases absorption spectra show the characteristic equi-spaced absorption peaks. Results demonstrate that under the condition of lean oxygen, there exists a critical oxygen concentration in the process of coal oxidation at low temperature. Comparing with Fourier infrared spectrum testing, the presented method is highly accurate and more sensitive, especially suitable for early-stage monitoring of the indicator gases produced by coal spontaneous combustion.

引用

页码：709 / 718

页数：10

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