Study on Isothermal Adsorption/Desorption Experiment Method of Raw Coal Under the Condition of Surrounding Pressure
Abstract：In order to deep study the surrounding rock affected to the adsorption features of coal and rock, a experiment method to meas- ure the isothermal adsorption/desorption features of raw coal under the surrounding rock pressure was provided and the experiment device could be researched and developed. The method and the device could be applied to twice isothermal adsorption/desorption repeated exper- iments with CH4 under the surrounding pressure of 15 MPa for a same dry raw coal sample. The error of the repeatability would be less than 5% , could show a good repeatability of the method and device. The analysis of experiment results with the adsorption theory showed that under the high surrounding pressures, the raw coal sample would have a reversibility of a typical adsorption and desorption and the hysteresis of the desorption process to CH4. The pore volume variation in coal occurred in the adsorption/desorption process may influence the repeatability tests.
Keywords：surrounding pressureraw coaladsorption/desorptionrepeatabilityisothermal adsorption/desorption curves
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：4( 52-55 )