State Key Laboratory of Coal and CBM Co-mining;
Jincheng 048000;
China;
The Research Center of Chemical Engineering;
School of Chemical Engineering and Technology;
Tianjin University;
Tianjin 300072;
China;
Key Laboratory of Cryogenics;
Technical Institute of Physics and Chemistry;
Chinese Academy of Sciences;
Beijing 100190;
China;
oalbed methane enrichment; VPSA process; Activated carbon Numerical modeling;