A study in adsorption characteristics of lignite in China
To help in ascertaining methane content of lignite reservoir in China, isothermal adsorption measurements of methane have been performed on moisture-equilibrated coals of some typical lignite bearing basins, which comprise maximum reflectance of vitrinite (Ro, max) ranging from 0.24% to 0.50%. Related to other coal properties, our analysis shows that methane adsorption of lignite is mainly affected by coalification, as well as by maceral composition, moisture content, and seam temperature. MaximuM methane capacities of moisture-equilibrated lignite coals show a continuously increasing (and reasonably exponential) trend with increasing Ro, max. Methane adsorption capacity decreases with maceral composition besides the range 40%～60%, respectively. Moisture content shows discretely correspondence with methane capacity. Methane capacity also decreases as seam temperature increased, and its develement increases with pressure under a certain temperature.
lignite methane adsorption characteristics influencing factors
K. X. Wang X. H. Fu A. H. Liu
School of Resource & Geoscience, China University of Mining & Technology, Xu Zhou, 221008. Jiangsu, China Key Laboratory of CBM Resources and Dynamic Accumulation Process (China University of Mining and Technology), Ministry of Education)
国际会议
徐州
英文
195-200
2009-09-24（万方平台首次上网日期，不代表论文的发表时间）