Experimental study on the oxidation characteristics of coal under the action of water and MgCl2

IF 3.1 2区化学 Q2 CHEMISTRY, ANALYTICAL

Thermochimica Acta Pub Date : 2025-03-07 DOI:10.1016/j.tca.2025.179978

Zongxiang Li , Cheng Wang , Cong Ding , Lin Li , Shuoran Huang , Ji Wu

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Abstract

To explore the impact of MgCl₂ solution on the autoignition properties of coal, anthracite from Ordos, Inner Mongolia was selected for study. Using a custom-designed closed oxygen consumption experiment, the research compared the oxygen concentration, uptake rate, CO emission, and exothermic intensity among raw coal, water-soaked coal, and coal treated with MgCl₂ solution. The results revealed an exponential increase in oxygen uptake, CO production, and heat release across all coal types, with the MgCl₂-treated coal exhibiting the highest rates. At 25 °C and 40 °C, the oxidation heat release intensity of water-soaked coal increased by 76.1 and 87.4 times, while that of MgCl₂-treated coal increased by 560 and 311 time. The enhancing effect of MgCl₂ on coal's oxidative heat release intensity was found to diminish with rising temperatures. The study concluded that MgCl₂ solution, by promoting coal moisture absorption and thereby increasing oxygen diffusion, significantly raises the risk of spontaneous combustion.

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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