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1 Department of Chemical and Biochemical Engineering, Technical University of Denmark 2 CERE – Center for Energy Ressources Engineering, Department of Chemical and Biochemical Engineering, Technical University of Denmark 3 Center for Energy Resources Engineering, Center, Technical University of Denmark 4 Department of Chemistry, Technical University of Denmark 5 unknown 6 Statoil ASA 7 Statoil ASA
Liquid-liquid equilibria data for two binary and two ternary systems are reported in the temperature range of 303.15-323.15. K at atmospheric pressure. The binary systems measured are n-nonane + MEG and ethylbenzene + MEG and the ternary systems are n-nonane + MEG + water and ethylbenzene + MEG + water. These data are satisfactorily correlated (binaries) and predicted (ternaries) using Cubic Plus Association (CPA) equation of state (EoS). CPA is also applied to binary LLE of aromatic hydrocarbon + water and VLE of methane + methanol. Finally the distribution of water and inhibitors (methanol and MEG) in various phases is modeled using CPA. The hydrocarbon phase consists of mixture-1 (methane, ethane, n-butane) or mixture-2 (methane, ethane, propane, n-butane, n-heptane, toluene and n-decane). CPA can satisfactorily predict the water content in the gas phase of the multicomponent systems containing mixture-1 over a range of temperatures and pressures. Similarly the methanol content in the gas phase of mixture-1 + water + methanol systems is predicted satisfactorily with accuracy within experimental uncertainty. For VLLE of mixture-2. +. water, mixture-2 + MEG + water and mixture-2 + methanol + water systems, the organic phase compositions are satisfactorily predicted whereas modeling results are relatively less satisfactory for the vapor phase compositions partially due to uncertainties in the experimental data. © 2012 Elsevier B.V.
Fluid Phase Equilibria, 2013, Vol 337, p. 298-310
Atmospheric pressure; Binary mixtures; Butane; Ethane; Ethylbenzene; Glycol; Methane; Organic compounds; Phase equilibria; Propane; Ternary systems; Toluene; Uncertainty analysis; Vapors; Waterworks; Methanol; CPA; Vapor–liquid equilibrium; Vapor–liquid–liquid equilibrium
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