煤矿安全2024，Vol.55Issue(1)：34-41,8.DOI:10.13347/j.cnki.mkaq.20221609
不同变质程度煤的吸附瓦斯动力学特性实验研究
Experimental study on kinetic characteristics of gas adsorption of coal with different degrees of metamorphism
摘要
Abstract
In order to further reveal the dynamic characteristics of coal with different degrees of metamorphism under different ad-sorption pressures,the self-developed TQY-2 precision adsorption instrument and infrared thermal imaging device were used to con-duct macroscopic adsorption tests on lignite,coking coal and anthracite coal samples with a diameter of 8.5 mm at different pres-sures(0.2,0.4,0.6,0.8,1.0 MPa)and the adsorption test of the mesoscopic structure of the coal body with adsorption pressures of(0.3,0.6,0.9,1.2,1.5 MPa),using quasi-primary and quasi-secondary adsorption kinetic models such as intra-particle diffusion,Elovich and double constant analyze the law and mechanism of adsorption gas.The results show that compared with five adsorption kinetics models,the quasi-secondary adsorption kinetics model is suitable for characterizing the adsorption gas process of lignite and coking coal,while the optimal model for anthracite is the intra-particle diffusion model;with the increase of adsorption pressure,the quasi-secondary adsorption rate constant k2 of lignite and coking coal gradually increased,and the intra-particle diffusion rate con-stant kp of anthracite coal also gradually increased,all of which were positively correlated;adsorption pressure has little effect on the dynamic model suitable for coal samples;under the macroscopic adsorption experiment and the mesoscopic structure adsorption ex-periment of coal body based on infrared thermography,the dynamic models suitable for different degrees of metamorphism are con-sistent.关键词
不同变质程度/不同压力/瓦斯吸附/动力学/吸附速率Key words
different metamorphism degrees/different pressures/gas adsorption/kinetics/adsorption rate分类
矿业与冶金引用本文复制引用
王梦露,沈永星,周动,王辰,王金鑫,冯雪健..不同变质程度煤的吸附瓦斯动力学特性实验研究[J].煤矿安全,2024,55(1):34-41,8.基金项目
国家自然科学基金资助项目(12102293) （12102293）
国家自然科学基金面上资助项目(52274200) （52274200）
