Prediction of CO2 adsorption-induced deformation in shale nanopores

摘要: Abstract Understanding of CO2 adsorption in shale provides significant information about the potential for geological storage formations to mitigate impact carbon emissions on climate. This work focuses behavior with various pore sizes at a wide temperature range including 31.28 °C, 40 °C, 65 °C, and 90 °C pressures up 15 MPa through comprehensive model. Using thermodynamic approach, we combine lattice density functional theory finite element formulation estimate along its induced strain nanopores. We study effect geometric confinement, size geometry, excess swelling under different temperatures. When model was applied sorption Posidonia Shale samples, all reported experimental features phenomenon were reproduced. Although developed specific case adsorption-induced shale, it is also applicable any problem regarding fluid confined porous medium triggered strain. found that highly geometry duct pore, which applies large attractive surface field adsorbed layers, leads faster, higher amount compared slit pore. more larger widths. The results demonstrate sharp rise isotherm near bulk critical point CO2. attributes compressive point, increase and, thus, phase resultant denote total volumetric function temperature, width, shape. shape prominent pores sizes.