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Volume 22 Issue 3
Jun 2011
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Article Contents
Kexin Wang, Xuehai Fu, Yong Qin, Santigie K. Sesay. Adsorption Characteristics of Lignite in China. Journal of Earth Science, 2011, 22(3): 371-371. doi: 10.1007/s12583-011-0189-2
Citation: Kexin Wang, Xuehai Fu, Yong Qin, Santigie K. Sesay. Adsorption Characteristics of Lignite in China. Journal of Earth Science, 2011, 22(3): 371-371. doi: 10.1007/s12583-011-0189-2

Adsorption Characteristics of Lignite in China

doi: 10.1007/s12583-011-0189-2
Funds:

the National Natural Science Foundation of China 40872104

the 2008 Project of Postgraduate Scientific Innovation of University in Jiangsu CX08B_023Z

More Information
  • Corresponding author: Kexin Wang, kathy_wang@foxmail.com
  • Received Date: 23 Nov 2009
  • Accepted Date: 10 Mar 2010
  • Publish Date: 01 Jun 2011
  • To help in ascertaining methane content of lignite reservoir in China, the 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 increases, and its reduction increases with pressure under a certain temperature.

     

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