Geochemical evaluation of Washita-Fredericksburg formation as a carbon storage reservoir.

Geological carbon sequestration is a promising technique to reduce atmospheric greenhouse gas emissions. The Washita-Fredericksburg formation in the southeastern United States is being considered as a prospective storage formation. This requires understanding the geochemical impact of CO injection on the formation, which is the focus of this work.

Assessment of Geochemical Limitations to Utilizing CO as a Cushion Gas in Compressed Energy Storage Systems.

Compressed energy storage (CES) of air, CO, or H in porous formations is a promising means of energy storage to abate the intermittency of renewable energy production. During operation, gas is injected during times of excess energy production and extracted during excess demands to drive turbines. Storage in saline aquifers using CO as a cushion or working gas has numerous advantages over typical air storage in caverns.

The Nanoscale Basis of CO2 Trapping for Geologic Storage.

Carbon capture and storage (CCS) is likely to be a critical technology to achieve large reductions in global carbon emissions over the next century. Research on the subsurface storage of CO2 is aimed at reducing uncertainties in the efficacy of CO2 storage in sedimentary rock formations. Three key parameters that have a nanoscale basis and that contribute uncertainty to predictions of CO2 trapping are the vertical permeability kv of seals, the residual CO2 saturation Sg,r in reservoir rocks, and the reactive surface area ar of silicate minerals.