Supercritical CO2 flow through a layered silica sand/calcite sand system: Experiment and modified maximal inscribed spheres analysis

► X-ray CT observations of scCO2 flow through silica and calcite sample. ► Observations compared to modified maximal inscribed spheres modeling. ► Maximal inscribed spheres modeling used pore structure from micro computed tomography. ► scCO2 flow in the upstream silica sand was different than in the downstream silica. ► Downstream silica sand may be affected by calcite dissolution/precipitation.