Comparison of the SRK and CPA equations of state for physical properties of water and methanol

Comparison of SRK and CPA equations of state for phase equilibrium of binary and ternary systems containing aromatics

“…Among the different proposed equations of state (EoS) cubic-plus-association (CPA) model is one of the most new EoS models is able to well correlates the phase equilibria of aqueous systems comprises of aliphatic, olefinic and aromatic hydrocarbons [2][3][4][5][6][7][8][9][10][11][12]. This equation of state first proposed by Kontogeorgis et al [13] is an extension of the SRK EoS [14] that consists of two separate terms.…”

“…The second term is an association term derived from Wertheim's first order perturbation theory (statistical mechanics) from the period 1984-1987.Folas et al [5] have shown that water-aromatic/olefinic LLE can be successfully described with CPA EoS. In addition, Lundstrøm et al [3] are compared Soave-Redlich-Kwongd (SRK) and CPA models for modelling of physical properties of two associating compounds, water and methanol over extended temperature and pressure ranges. Their results demonstrated that the CPA model is well able to correlate the physical properties of associating compounds more accurately compared with SRK model.…”

Solvation model for estimating the properties of (vapour+liquid) equilibrium

“…For the phase equilibrium of associating systems, an analysis of the predicted capabilities of these approaches in terms of the proposed mixing rules was performed by many researchers [9,10,17]. In spite of the difference in the physical interaction terms of the EOS, it was found that reasonable results were produced in the description of association equilibrium, being in agreement with experimental data.…”

“…Recently, various versions of EOS including the family of the socalled ''chemical interaction" equations are widely used for calculating phase equilibrium of systems with multiple associating sites, i.e., the associated perturbed anisotropic chain theory (APACT), the statistical associating fluid theory (SAFT), the lattice quasi-chemical hole model (HM), Cubic-Plus-Association Equation of State (CPA-EOS), and COSMO-RS method [9][10][11][12][13][14][15][16][17][18][19]. For the phase equilibrium of associating systems, an analysis of the predicted capabilities of these approaches in terms of the proposed mixing rules was performed by many researchers [9,10,17].…”

Homogeneous water nucleation and droplet growth in methane and carbon dioxide mixtures at 235 K and 10 bar

“…6,7 The liquid fractions of methane, carbon dioxide and water were computed with the CPA EOS. The density of the liquid could not be taken directly from the CPA model because it is unable to reproduce the temperature dependence and the maximum of the density of water, as noted by Lundstrøm et al 40 The CPA can, however, be used to approximate the relative density change caused by the solution of methane and carbon dioxide into water. This value was combined with the IAPWS ͑Ref.…”