Modeling of gas solubility in brine

Thermodynamic model of aqueous CO2–H2O–NaCl solutions from −22 to 100°C and from 0.1 to 100MPa

“…The models include those based on the cubic EoS formalism with various modifications to account for the influence of ionic interactions (e.g. [49,[52][53][54][55]. Other models are based on mean spherical approximations (e.g.…”

CO2-H2O mixtures in the geological sequestration of CO2. II. Partitioning in chloride brines at 12–100°C and up to 600 bar

“…In the last decade or so, however, other solubility models have been developed that make use of one single EOS (e.g., Peng-Robinson) to compute the properties of both the aqueous and compressed-gas phases at equilibrium. These models, reported primarily in the chemical engineering literature, have been applied to pure CO 2 -H 2 O systems (e.g., Shyu et al, 1997) and to systems including electrolyte solutions (e.g., Harvey and Prausnitz, 1989;Zuo and Guo, 1991;Søreide and Whitson, 1992;Sørensen et al, 2002;Masoudi et al, 2004). The main drawback of these models is that an iterative procedure must be used to solve the EOS twice, once for the gas-phase composition and a second time for the liquid-phase composition.…”

Underground hydrogen storage in the UK

“…As identified, the ideal gas law is applicable to low pressure hydrogen storage; however, at increased pressures and/or for multi-gas mixtures a more complicated EOS is needed. For such systems cubic equations of state are commonly applied; the two most common are Peng-Robinson (PR) and Soave-Redlich-Kwong (SRK) (Sorensen et al 2002).…”