Study on absorption behavior of coalbed gas under 17 variable temperature and pressure conditions
MIAO Ze-kai
LI Dong
WANG Zhen
Abstract：LI adsorption-flow equation could calculate the how adsorption conditions(temperature,pressure,and performance of coal seam)synthetically affected the coal bed gas adsorption at coal surface and the flow in hole quantificationally,meanwhile,it could be used in handling the adsorption data of many coal samples under 30 ℃~100 ℃ and 0.1 MPa~32 MPa.According to the size of relative average errors,it was suggested that the buried depth of coal seam and the corresponding temperature and pressure should be divided into three zones(shallow zone,transition zone and deep zone).With the increase of temperature,pressure and depth,that is,from the shallow zone to deep zone,Δ values have higher point,the B values (adsorption coefficient) have lower point,but β(constants of Freundlich adsorption isotherm equation) is reduced.
Keywords：coalbed gasadsorption behaviorLI adsorption-flow equationrelative mean errorcoal seam depthtemperature pressureadsorption amount coefficient
Publication Date：2017-01-01
Pages：4( 25-28 )