Experimental Study on Characteristics of Methane Adsorption-Desorption on No.3 Coal Seam in Yangquan
To explore the characteristics of methane adsorptiondesorption on No.3 coal seam in Yangquan, two repeated experiments were done on the same dried coal samples by high-pressure volumetric method. Combining with adsorption theory, the experimental results were analyzed theoretically, by analysis we can draw the following conclusions. It is typical of adsorptiondesorption reversibility and adsorption hysteresis, and hysteresis is mainly due to the truth that pores diameter of about 50 nm are developing in the coal, so it is easy to form a classical capillary condensation. Using adsorption model of monomolecular layer, Langmuir equation to analyze experimental data, it was found that absorption capacity is greater than that of Langmuir adsorption model corresponding when pressure is about 7 MPa, the reasons following an analysis are that a multimolecular layer adsorption is occurring. In the same time, it was found that adsorption-desorption may result in changes in coal pore volume, thereby; the result of adsorption constants can be affected. Through the experiment, we have a better understanding to methane adsorption-desorption characteristics on No.3 coal seam in Yangquan, and it is helpful to improve test accuracy of adsorption constants.
Yangquan mining area methane adsorption desorption Langmuir equation
XIAO Zhiguo WANG Zhaofeng
School of Safety Science & Engineering, Henan Polytechnic University, Jiaozuo 454003, Henan, China School of Safety Science & Engineering, Henan Polytechnic University, Jiaozuo 454003, Henan, China C
国际会议
The 2010 International Symposium on Safety Science and Technology(2010 安全科学与技术国际会议)
杭州
英文
1656-1661
2010-10-26（万方平台首次上网日期，不代表论文的发表时间）