Experimental study on thermokinetic characteristics of multiple coal seams in Xinjiang open pit mine using thermogravimetric–Fourier transform infrared spectroscopy and thermogravimetric–mass spectrometry

IF 3.1 2区化学 Q2 CHEMISTRY, ANALYTICAL

Thermochimica Acta Pub Date : 2025-03-01 DOI:10.1016/j.tca.2025.179973

Jianling Zang , Wei Sun , Zhenkai Yang , Zhijie Ding , Meng Dong , Shengjie Jiang , Yongheng Gui , Hailin Jia

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Abstract

This study focuses on the coal spontaneous combustion in the open-pit mining of multiple coal seams in Dananhu No.2 Mine. Experimental research was conducted on the characteristics and thermokinetics of coal spontaneous combustion oxidation. A synchronous thermal analysis thermogravimetric (TG)-differential scanning calorimetry(DSC)- Fourier transform infrared spectroscopy (FTIR), thermogravimetric(TG)-mass spectrometry (MS) combined system was used to analyze the mass variation, gaseous product, functional group and other parameters of coal spontaneous combustion. The results of TG-DTG-DSC analysis indicate that different heating rates affect the characteristic temperature points and thermal weight loss process of coal spontaneous combustion. A significant change in the reaction kinetics mechanism of the coal spontaneous combustion process. The relationship between the apparent activation energy and the pre-exponential factor in coal spontaneous combustion indicates that the pre-exponential factor positively correlates with the apparent activation energy. These findings are crucial for a deeper understanding of the coal spontaneous combustion process.

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来源期刊

Thermochimica Acta 化学-分析化学

CiteScore

6.50

自引率

8.60%

发文量

210

审稿时长

40 days

期刊介绍： Thermochimica Acta publishes original research contributions covering all aspects of thermoanalytical and calorimetric methods and their application to experimental chemistry, physics, biology and engineering. The journal aims to span the whole range from fundamental research to practical application. The journal focuses on the research that advances physical and analytical science of thermal phenomena. Therefore, the manuscripts are expected to provide important insights into the thermal phenomena studied or to propose significant improvements of analytical or computational techniques employed in thermal studies. Manuscripts that report the results of routine thermal measurements are not suitable for publication in Thermochimica Acta. The journal particularly welcomes papers from newly emerging areas as well as from the traditional strength areas: - New and improved instrumentation and methods - Thermal properties and behavior of materials - Kinetics of thermally stimulated processes