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Phase equilibria modeling of methanol-containing systems with the CPA and sPC-SAFT equations of state by Peter C.V. Tybjerg; Georgios M. Kontogeorgis; Michael L. Michelsen; Erling H. Stenby is a Engineering article available to read on EtoBox.

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Proper representation at various conditions of phase equilibria of methanol-containing mixtures (with hydrocarbons, water, etc.) is important for oil flow assurance purposes. In this work two association equations of state, CPA and sPC-SAFT, are applied to methanolcontaining mixtures. The purpose of this work is to investigate which association schemes (e.g. two-site, three-site) should be used for methanol which will result in successful representation of methanol-water-hydrocarbon phase equilibria. Parameters from the literature as well as newly estimated parameters based on vapor pressure, liquid density, enthalpy of vaporization and compressibility factor data are used. Methanol-alkane vapor-liquid equilibrium (VLE) and liquid-liquid equilibrium (LLE) data, water-methanol VLE as well as water-methanol-hydrocarbon LLE are considered. It is concluded that the two association equations of state perform overall similarly, with the two-site association scheme being a better choice than the three-site scheme, for phase equilibrium calculations. Use of the additional properties (enthalpy of vaporization and compressibility factor) in the parameter estimation has a larger effect on the

Who reads Phase equilibria modeling of methanol-containing systems with the CPA and sPC-SAFT equations of state?

Author

Peter C.V. Tybjerg; Georgios M. Kontogeorgis; Michael L. Michelsen; Erling H. Stenby

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0378-3812)

Published

2010

Language

EN

Field

Engineering (Physical Sciences)