Hydrogen and CO2 storage in sandstone: understanding porous media behavior

Studies on hydrogen and CO 2 storage in the subsurface are vital for advancing clean energy and climate change mitigation. They help optimize underground hydrogen storage for balancing energy supply and demand and improve carbon capture and storage (CCS) techniques to trap CO 2 , reducing atmospheric levels securely. These studies can ensure the geotechnical stability of storage sites, minimizing leakage risks, while enhancing our understanding of the storage capacity in porous media like sandstone, leading to safer and more efficient long-term storage solutions. This study explores hydrogen and CO 2 storage on a laboratory scale to determine how these gases behave in porous sandstone media under varying pressure conditions. Further, this study typically investigates to understand how well the porous media can store and retain gases. The study also examines the mechanisms of trapping (capillary and residual trapping) of hydrogen and CO 2 , which is essential for long-term underground storage.