Sequestration of non-pure carbon dioxide streams in iron oxyhydroxide-containing saline repositories

► Goethite (α-FeOOH) was evaluated as a potential mineral to trap geochemically CO2-SO2 gas mixtures. ► Results obtained in a 24 day experiment were consistent with modeling simulations. ► Iron carbonate (FeCO3) precipitated in a goethite-CO2-SO2-brine system at 150 °C and 300 bar.