We are missing a deep understanding of the coupling of multiphase flows and fluid-solid reactions, including rock dissolution and mineral precipitation. To achieve this objective, we designed a geo-material microfluidic cell using limestone from SACROC unit (Texas, US) as substrate. For the single flow experiment, supercritical (sc) CO$_2$ dissolved in brine was flowed through a controlled etched geometry. In the same geometry, CO$_2$-saturated brine and scCO$_2$ were simultaneously injected for the multiphase flow experiment. Dissolution and precipitation rates for single and multiphase flows were deduced from high-precision 3D measurements, and changes in permeability from pressure measurements. We also simulated the flow through the pore space to quantify changes in flow dynamics due changes in geometry. We showed the coupling of single and multiphase flow and fluid-solid reactions, demonstrating the impact of multiphase flows on the latter.
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