煤矿安全2025，Vol.56Issue(6)：27-32,6.DOI:10.13347/j.cnki.mkaq.20240950
超临界CO2对构造煤孔隙结构及解吸特性的影响
Effect of supercritical CO2 on pore structure and desorption characteristics of tectonic coal
摘要
Abstract
In order to analyze the influence of supercritical CO2 on pore structure and desorption characteristics of tectonic coal,a high-temperature and high-pressure geological environment simulation system was used to treat primary coal and tectonic coal with supercritical CO2,and then mercury injection method and coal sample desorption experimental system were used to quantitatively characterize the pore structure and desorption characteristics of coal.The results show that the total pore volume of coal samples in-creases after supercritical CO2 treatment,and the pore expansion effect of supercritical CO2 on tectonic coal is more obvious.Due to the extraction and dissolution effect of supercritical CO2,the pore size of structural coal increases to a certain extent,and the changes of small hole and large hole are the most obvious.The increment of hysteresis loop of treated tectonic coal is significantly higher than that of primary coal,indicating that the pore network of treated structural coal is more developed and the connectivity is better.At equilibrium pressures of 0.74 MPa and 3.00 MPa,the increase in the desorption capacity of tectonic coal after supercritical CO2 treatment is significantly higher than that of primary coal,which is caused by the increase in the total pore volume of tectonic coal after supercritical CO2 treatment.关键词
超临界CO2/碳封存/孔隙结构/解吸特性/构造煤/煤层气开采Key words
supercritical CO2/carbon sequestration/pore structure/desorption characteristics/tectonic coal/coalbed methane recovery分类
矿业与冶金引用本文复制引用
牛凡凡,苏二磊,魏佳琪,朱新宇..超临界CO2对构造煤孔隙结构及解吸特性的影响[J].煤矿安全,2025,56(6):27-32,6.基金项目
国家自然科学基金资助项目(52204209) （52204209）
河南省科技攻关资助项目(242102321106) （242102321106）
河南省青年托举人才工程资助项目(2025HYTP049) （2025HYTP049）
