STUDY ON ADSORPTION AND DESORPTION CHARACTERISTICS OF NORMAL COAL AND DEFORMED COAL WITH DIFFERENT STRATIFICATION AT THE SAME LOCATION

Abstract: A series isothermal adsorption data of normal coal and deformed coal from China have been transformed into the temperature-pressure-absorbing equation. At 42.0 °C temperatures and 9.0 MPa pressure, the adsorption amount of normal coal is 44.708 cm3/g with -0.6719 KJ·mol-1·cm-3·g unit isosteric adsorption enthalpy, and the adsorption amount of deformed coal is 43.41 cm3/g with -0.5202 KJ·mol-1·cm-3·g unit isosteric adsorption enthalpy. The normal coal should be absorbed first, then the deformed coal. The deformed coal should be desorbed first, then the normal coal.

Keywords: temperature-pressure-absorbing equation, unit isosteric adsorption enthalpy, unit isosteric desorption enthalpy.