TY - JOUR
T1 - Hydrate - fluid phase equilibria modeling using PC-SAFT and Peng-Robinson equations of state
AU - El Meragawi, Sally
AU - Diamantonis, Nikolaos I.
AU - Tsimpanogiannis, Ioannis N.
AU - Economou, Ioannis G.
PY - 2016/4/15
Y1 - 2016/4/15
N2 - In this work, the Perturbed-Chain Statistical Associating Fluid Theory (PC-SAFT) and the Peng-Robinson (PR) cubic equation of state are coupled with the van der Waals-Platteeuw theory in order to calculate the hydrate phase equilibria for different pure gases, including CH4, C2H6, C3H8, iC4H10, CO2, N2, Ar, O2 and H2S, as well as representative binary, ternary and quaternary mixtures of these gases. Calculations for three-phase (Hydrate - Liquid water - Vapor; HLwV) equilibria are performed. The optimization of the Kihara ε parameter, through a fit to experimental data further improves the accuracy in correlating the hydrate equilibrium pressure for both models. Overall, it is shown that PR is more accurate than PC-SAFT for the prediction of clathrate hydrate equilibrium conditions for the systems considered.
AB - In this work, the Perturbed-Chain Statistical Associating Fluid Theory (PC-SAFT) and the Peng-Robinson (PR) cubic equation of state are coupled with the van der Waals-Platteeuw theory in order to calculate the hydrate phase equilibria for different pure gases, including CH4, C2H6, C3H8, iC4H10, CO2, N2, Ar, O2 and H2S, as well as representative binary, ternary and quaternary mixtures of these gases. Calculations for three-phase (Hydrate - Liquid water - Vapor; HLwV) equilibria are performed. The optimization of the Kihara ε parameter, through a fit to experimental data further improves the accuracy in correlating the hydrate equilibrium pressure for both models. Overall, it is shown that PR is more accurate than PC-SAFT for the prediction of clathrate hydrate equilibrium conditions for the systems considered.
KW - PC-SAFT
KW - Peng-Robinson EoS
KW - Three-phase equilibria (HLV) modeling
KW - Van der Waals-Platteeuw theory
UR - http://www.scopus.com/inward/record.url?scp=84957844633&partnerID=8YFLogxK
U2 - 10.1016/j.fluid.2015.12.003
DO - 10.1016/j.fluid.2015.12.003
M3 - Article
AN - SCOPUS:84957844633
SN - 0378-3812
VL - 413
SP - 209
EP - 219
JO - Fluid Phase Equilibria
JF - Fluid Phase Equilibria
ER -