Research on adsorption characteristics and adsorption model of CH4 and CO2 in Leping Formation coal seam of Fengcheng Mining Area
肖富强邹勇军章双龙祁星肖卫东
XIAO Fuqiang;ZOU Yongjun;ZHANG Shuanglong;QI Xing;XIAO Weidong
关键矿产资源勘查与开发江西省重点实验室江西省地质调查勘查院江西省煤田地质勘察研究院
煤体对气体的吸附特征决定了煤层的地质封存能力。对丰城矿区主力B4煤层进行了不同温度条件下的等温吸附实验,研究了煤层对气体的吸附特征,采用9种不同吸附数学模型对CO2吸附实验数据进行拟合,检验不同模型的拟合效果。结果表明:丰城矿区B4煤层CH4、CO2等温吸附实验规律总体表现为压力正效应、温度负效应;煤层对CO2的吸附能力明显高于对CH4的吸附能力,二者最大吸附量的比值约为2.0;9种模型中,L模型、T模型、LF模型、EL模型的拟合效果最好,最适合表征煤层对CO2的吸附特征。
The gas adsorption characteristic of coal body determines the geological storage capacity of coal seam. Isothermal adsorption experiments were conducted in the main B4 coal seam in the mining area under different temperature conditions to study the gas adsorption characteristics of the coal seam. Nine different adsorption mathematical models were used to fit and analyze the CO2 adsorption experimental data, and the fitting effects of different models were tested. The results indicate that: the overall experimental pattern of CH4 and CO2 isothermal adsorption in B4 coal seam of Fengcheng Mining Area shows that the pressure is a positive effect and the temperature is a negative effect; the adsorption capacity of coal seams for CO2 is significantly stronger than that for CH4, and the ratio of the maximum adsorption capacity of the two is about 2.0; the L model, T model, LF model, and EL model have the best fitting effect and are most suitable for characterizing the adsorption characteristics of CO2 in coal seams.
CO2地质封存煤层气等温吸附吸附模型碳中和丰城矿区
geological storage of CO2;coal-bed methane;isothermal adsorption;adsorption model;carbon neutrality;Fengcheng Mining Area
主办单位:煤炭科学研究总院有限公司 中国煤炭学会学术期刊工作委员会