Sep, 2026
Journal
Exsolution, Evolution, and Hysteresis of CO2 Nanobubbles in Water-Saturated Sandstone
Understanding CO2 nanobubble formation in water-saturated sandstone is critical for understanding fluid behavior in CO2 storage systems. Here, CO2 exsolution from an aqueous phase in a sandstone was investigated using small-angle neutron scattering at 50°C during cyclic depressurization from 12 to 0.7 MPa. Nanoscale heterogeneities consistent with CO2 clusters and nanobubb…