Experimental research on adsorption characteristics of N ₂ , CH ₄ , and CO ₂ in coal under different temperatures and gas pressures

The coal deformation was induced by the gas adsorption of N2, CH4, and CO2. However, differences between different performances mechanism need to be further studied. In this study, experiments were conducted using self-developed equipment reveal characteristics gases. results showed that capacity followed sequence CO2 > CH4 N2. negatively correlated with temperature. maximum decrease in (23.70%) positively pressure. increase (232.79%) Correspondingly, largest, N2 smallest. (31.09%) during temperature increase. initial rates 0.060, 0.091, 0.042 mm·h−1, respectively. (234.65%) pressure 0.024, 0.045, 0.016 This work guided clarifying gases' deformation.