Analysis of zero-reference-pressure EoS/GE models

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1995 (EN)
Analysis of zero-reference-pressure EoS/GE models (EN)

Kalospiros Nikolaos, S (EN)
Tzouvaras, Nikolaos (EN)
Tassios Dimitrios, P (EN)
Coutsikos, Philippos (EN)

N/A (EN)

An analysis of EoS/G(E) models, which are based on matching the EoS-derived expression for. the excess Gibbs free energy G(E) With that from a G(E) model at zero pressure, is presented with the focus on the most successful and winery used of these models, MHV2 and PSRK. It shows why zero-reference-pressure models do not reproduce exactly the G(E) models at zero pressure and the ensuing implications on the prediction of asymmetric systems. The development of EoS/G(E) models that reproduce exactly the G(E) model is discussed However, such reproducibility at zero pressure is impossible for systems containing components with reduced temperatures higher than about 0.9. Therefore, extrapolation schemes that allow treatment of such systems are examined. (EN)


Extrapolation (EN)
Composition (EN)
Gibbs free energy (EN)
Temperature (EN)
Equations of state (EN)
Reproducibility (EN)
Mixing rule (EN)
Approximation theory (EN)
Mathematical models (EN)
Pressure (EN)
Zero pressure (EN)

Εθνικό Μετσόβιο Πολυτεχνείο (EL)
National Technical University of Athens (EN)

AIChE Journal (EN)


AIChE, New York, NY, United States (EN)

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