Effects of Various Solvents on Adsorption of Organics for Porous and Nonporous Quartz/CO₂/Brine Systems: Implications for CO₂ Geo-Storage

The underground geo-storage of carbon dioxide (CO2) is an essential component the capture and sequestration value chain. success CO2 containment depends on wetting state rock, which controls mechanism fluid flow distribution. presence organic acids in storage formation introduces a considerable effect wettability rock/CO2/brine system under various temperature pressure conditions. Despite previous studies this topic, impact substrate pores, rock surface roughness, solvents used to prepare acid solution temperatures pressures has not yet been elucidated. In present study, contact angles non-porous quartz porous Fontainebleau are measured CO2/brine systems at 0.1–20 MPa 298 323 K. addition, stearic order assess their influence adsorption organics for quartz/CO2/brine systems. results clearly indicate that n-decane most effective solvent solubilizing attain full by due its polar compatibility with acid. Generally, aged exhibits higher than pressures, unaged surfaces demonstrate water wettability, wide range advancing receding less 90°. However, when increased 15 20 system, those pure quartz. These suggest roughness merely amplifies inherent chemistry original if conditions hydrophobic.