Jiangsu Branch Kongzhuang Coal Mine, Shanghai Datun Energy Co.,Ltd
School of Safety Engineering, North China Institute of Science and Technology

为研究CO2/O2混合气体在不同含水率烟煤中的竞争吸附特征,分别建立了含水率为1.42%、3.48%和5.45%的烟煤分子模型,在不同温度和压力条件下进行煤对CO2/O2混合气体的吸附模拟研究。结果表明:不同含水率煤中CO2的吸附能力优于O2,煤中水分含量增加对CO2和O2气体的吸附起到抑制作用,并且对CO2的抑制作用更强。整个体系的相互作用能与CO2的比例成正比,与煤的含水率成反比。说明向煤层注入CO2时,含水率越高越不利于煤对气体的吸附,低压低温状态有利于增强防治煤自燃的效果。

In order to study the competitive adsorption characteristics of CO2/O2 gas mixture in bituminous coals with different water contents, molecular models of bituminous coals with water contents of 1.42%, 3.48%, and 5.45% were established, and the adsorption simulation study of coal on CO2/O2 gas mixture was carried out under different temperature and pressure conditions. The results showed that the adsorption capacity of CO2 in coals with different water contents was better than that of O2, and the increase in water content in coal inhibited the adsorption of CO2 and O2 gases, and the inhibition of CO2 was stronger. The interaction energy of the whole system is proportional to the proportion of CO2 and inversely proportional to the moisture content of coal. It indicates that when CO2 is injected into the coal seam, the higher the water content, the more unfavorable the adsorption of the gas by the coal, and the low-pressure and low-temperature state are conducive to the enhancement of the effect of preventing spontaneous combustion of coal.

国家自然科学基金资助项目(52074122)

周生啟,张雅宙,汤晓辰,等.CO2/O2在不同含水率烟煤中的竞争吸附模拟研究[J].华北科技学院学报,2024,21(3):10-15

ZHOU Shengqi,ZHANG Yazhou,TANG Xiaochen,et al. Simulation of competitive adsorption of CO2/O2 in bituminous coals with different water contents[J].Journal of North China Institute of Science and Technology,2024,21(3):10-15