Thermodynamic and Dynamic Investigation for CO₂ Storage in Deep Saline Aquifers

Abstract

Thermodynamic and dynamic investigations are needed to study the sequestration capacity, CO 2 leakage, and environmental impacts. The results of the phase equilibrium and densities for CO 2 -sequestration related subsystems obtained from the proposed thermodynamic model on the basis of statistical associating fluid theory equation of state were summarized. Based on the equilibrium thermodynamics, preliminary kinetics results were also illustrated with chemical potential gradient as the driving force. The proposed thermodynamic model is promising to represent phase equilibrium and thermodynamic properties for CO 2 -sequestration related systems, i.e. CO 2 -(H 2 S)-H 2 O-ions (such as Na, Cl -, CO 3 2-), and the implementation of thermodynamic model into kinetics model to adjust the non-ideality of species is vital because of the high pressure for the investigation of the sequestration process.