An Evaluation of Cubic Equations of State for Phase Behavior Calculations Near Miscibility Conditions

1990 ◽  
Author(s):  
A. Danesh ◽  
Dong-Hai Xu ◽  
A.C. Todd
Keyword(s):  
Phase Behavior ◽  
Equations Of State

Application of the Du-Guo and SRK Equations of State To Predict the Phase Behavior of Chinese Reservoir Fluids

1991 ◽  
Vol 6 (03) ◽  
pp. 379-388 ◽  
Author(s):  
Tian-Min Guo ◽  
Lian-Gui Du ◽  
K.S. Pederssen ◽  
Aage Fredenslund
Keyword(s):  
Phase Behavior ◽  
Equations Of State

Mean-field lattice equations of state. III. Modeling the phase behavior of supercritical gas-polymer mixtures

1990 ◽  
Vol 23 (8) ◽  
pp. 2321-2329 ◽  
Author(s):  
Eric J. Beckman ◽  
Ronald Koningsveld ◽  
Roger S. Porter
Keyword(s):  
Phase Behavior ◽  
Equations Of State ◽  
Mean Field ◽  
Polymer Mixtures

scholarly journals Perturbation Theory and Phase Behavior Calculations Using Equation of State Models

2020 ◽  
Author(s):  
Vassilis Gaganis
Keyword(s):  
Perturbation Theory ◽  
Statistical Mechanics ◽  
Phase Behavior ◽  
Chemical Engineering ◽  
Equations Of State ◽  
Feed Composition ◽  
Fluid Properties ◽  
State Models ◽  
Equilibrium Phases

Equations of State (EoS) live at the heart of all thermodynamic calculations in chemical engineering applications as they allow for the determination of all related fluid properties such as vapor pressure, density, enthalpy, specific heat, and speed of sound, in an accurate and consistent way. Both macroscopic EoS models such as the classic cubic EoS models as well as models based on statistical mechanics and developed by means of perturbation theory are available. Under suitable pressure and temperature conditions, fluids of known composition may split in more than one phases, usually vapor and liquid while solids may also be present, each one exhibiting its own composition. Therefore, computational methods are utilized to calculate the number and the composition of the equilibrium phases at which a feed composition will potentially split so as to estimate their thermodynamic properties by means of the EoS. This chapter focuses on two of the most pronounced EoS models, the cubic ones and those based on statistical mechanics incorporating perturbation analysis. Subsequently, it describes the existing algorithms to solve phase behavior problems that rely on the classic rigorous thermodynamics context as well as modern trends that aim at accelerating computations.

Near-Critical Phase Behavior of Reservoir Fluids Using Equations of State

1995 ◽  
Vol 3 (01) ◽  
pp. 139-145 ◽  
Author(s):  
Sepehr Arbabi ◽  
Abbas Firoozabadi
Keyword(s):  
Phase Behavior ◽  
Equations Of State ◽  
Critical Phase

Phase Behavior Modeling of Hydrocarbon-Methanol-Water Mixtures by Peng-Robinson and SAFT Equations of State

2002 ◽  
Author(s):  
Padmakar Ayyalasomayajula ◽  
Ravi Sharma ◽  
Jacob G. Walker ◽  
Mukul M. Sharma ◽  
Gary A. Pope
Keyword(s):  
Phase Behavior ◽  
Equations Of State ◽  
Behavior Modeling

scholarly journals Solubilities in supercritical fluids

2005 ◽  
Vol 77 (3) ◽  
pp. 513-530 ◽  
Author(s):  
Dana E. Knox
Keyword(s):  
Phase Behavior ◽  
Supercritical Fluid ◽  
Supercritical Fluids ◽  
Food Processing ◽  
Significant Variation ◽  
Powder Processing ◽  
Equations Of State ◽  
Pollution Prevention ◽  
Controlled Drug Delivery

Solubilities in supercritical fluids are of great importance in a wide variety of applications. These applications include: production of controlled drug delivery systems, powder processing, pollution prevention and remediation, methods for spraying paints and coatings, precipitation/crystallization processes, bioseparations, and food processing. Examples of some of these applications will be given.Supercritical fluid processes make use of the significant variation of solubility with pressure when the solvent is a supercritical fluid. This permits the accomplishment of many processes that would be otherwise very difficult to achieve. To fully understand the benefits of such processes, one must understand the phase behavior of such systems. The types of phase behavior that can be observed will be discussed, along with the ways that this behavior can be used to modify solubilities in such fluids.There have been many methods proposed for the experimental determination of solubilities in supercritical fluids. These will be reviewed in general, and recommendations for preferred methods given.Solubilities in supercritical fluids can be correlated and predicted by making use of thermodynamic calculations involving equations of state, as well as by other methods. The various methods will be reviewed, and recommendations given for various applications.

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