Methane and carbon dioxide sorption/desorption on bituminous coal—Experiments on cubicoid sample cut from the primal coal lump

摘要: Abstract There was performed a research into the sorption of methane and mixture carbon dioxide on low-rank coal (type 32.2, according to PN-82/G-97002). Experiments were carried out by means volumetric method cubicoid solid sample, sized 20 × 20 × 40 mm, cut primal body. At same time, changes occurring in sample's overall dimensions, which accompanied processes, monitored. The kinetic curves deposition evacuation (two measurement cycles) curve for structure containing previously sorbed determined, as well adequate kinetics strains resulting from sorption/desorption processes. results show that experimental conditions process induced noticed coal–methane system are proportional. When slightly approximated, correlation between quantity gases being e = f (V) becomes linear. However, course sample strain time experiment coal-gaseous indicates occurrence shrinkage after dynamic increase sizes, although gas still collected structure. Their relation with under linear only initial stage experiment. It found case investigation preferable is dioxide, not methane, CH4 displaced phases CO2. seems feasible recover through capture storage CO2 bed whose structure, parameters petrographic composition complies material research.