Desorption hysteresis characteristics of CBM
Abstract：The CBM desorption hysteresis characteristics were analyzed based on adsorption-desorption experiments of different metamorphic sequence coal under variable-temperature and isothermal condition. Comprehensive analysis shows that the desorption hysteresis characteristics are notable for improving coal ranks and reducing pressure, desorp- tion hysteresis characteristics are not significant under increasing temperature. Differences of molecules and pore struc- ture between high and low-rank coals lead to the difference of their properties which is the primary cause of desorption hysteresis difference. In practice, promoting desorption of residual coal-bed methane under deficient pressure is a re- search direction to improve CBM recovery.
Keywords：CBM ( coalbed methane)desorption hysteresisdepressurization desorptionwarming-up desorption
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 1885-1889 )