Phase Behavior Modeling of Alkyl−Amine + Water Mixtures and Prediction of Alkane Solubilities in Alkanolamine Aqueous Solutions with Group Contribution with Association Equation of State

2010 ◽  
Vol 49 (15) ◽  
pp. 7085-7092 ◽  
Author(s):  
Francisco A. Sánchez ◽  
Ticiana M. Soria ◽  
Selva Pereda ◽  
Amir H. Mohammadi ◽  
Dominique Richon ◽  
...  
Keyword(s):  
Equation Of State ◽  
Aqueous Solutions ◽  
Phase Behavior ◽  
Group Contribution ◽  
Behavior Modeling ◽  
Alkyl Amine

Phase Behavior Modeling of Alkyl Amine + Hydrocarbon and Alkyl Amine + Alcohol Systems Using a Group Contribution Associating Equation of State

2009 ◽  
Vol 48 (16) ◽  
pp. 7705-7712 ◽  
Author(s):  
Francisco A. Sánchez ◽  
Amir H. Mohammadi ◽  
Alfonsina Andreatta ◽  
Selva Pereda ◽  
Esteban Brignole ◽  
...  
Keyword(s):  
Equation Of State ◽  
Phase Behavior ◽  
Group Contribution ◽  
Behavior Modeling ◽  
Alkyl Amine

scholarly journals Curvature-Based Equation of State for Microemulsion-Phase Behavior

SPE Journal ◽  
2018 ◽  
Vol 24 (02) ◽  
pp. 647-659 ◽  
Author(s):  
V. A. Torrealba ◽  
R. T. Johns ◽  
H.. Hoteit
Keyword(s):  
Equation Of State ◽  
Phase Behavior ◽  
Oil Recovery ◽  
Industrial Applications ◽  
Data Availability ◽  
Behavior Modeling ◽  
Average Curvature ◽  
Wide Range ◽  
Definition Of ◽  
Spheroidal Geometry

Summary An accurate description of the microemulsion-phase behavior is critical for many industrial applications, including surfactant flooding in enhanced oil recovery (EOR). Recent phase-behavior models have assumed constant-shaped micelles, typically spherical, using net-average curvature (NAC), which is not consistent with scattering and microscopy experiments that suggest changes in shapes of the continuous and discontinuous domains. On the basis of the strong evidence of varying micellar shape, principal micellar curves were used recently to model interfacial tensions (IFTs). Huh's scaling equation (Huh 1979) also was coupled to this IFT model to generate phase-behavior estimates, but without accounting for the micellar shape. In this paper, we present a novel microemulsion-phase-behavior equation of state (EoS) that accounts for changing micellar curvatures under the assumption of a general-prolate spheroidal geometry, instead of through Huh's equation. This new EoS improves phase-behavior-modeling capabilities and eliminates the use of NAC in favor of a more-physical definition of characteristic length. Our new EoS can be used to fit and predict microemulsion-phase behavior irrespective of IFT-data availability. For the cases considered, the new EoS agrees well with experimental data for scans in both salinity and composition. The model also predicts phase-behavior data for a wide range of temperature and pressure, and it is validated against dynamic scattering experiments to show the physical significance of the approach.

Expanding the Applications of the SAFT-γ Mie Group-Contribution Equation of State: Prediction of Thermodynamic Properties and Phase Behavior of Mixtures

2020 ◽  
Vol 65 (12) ◽  
pp. 5862-5890
Author(s):  
Andrew J. Haslam ◽  
Alfonso González-Pérez ◽  
Silvia Di Lecce ◽  
Siti H. Khalit ◽  
Felipe A. Perdomo ◽  
...  
Keyword(s):  
Equation Of State ◽  
Thermodynamic Properties ◽  
Phase Behavior ◽  
Group Contribution ◽  
State Prediction

Prediction of Thermodynamic Properties and Phase Behavior of Fluids and Mixtures with the SAFT-γ Mie Group-Contribution Equation of State

2014 ◽  
Vol 59 (10) ◽  
pp. 3272-3288 ◽  
Author(s):  
Simon Dufal ◽  
Vasileios Papaioannou ◽  
Majid Sadeqzadeh ◽  
Thomas Pogiatzis ◽  
Alexandros Chremos ◽  
...  
Keyword(s):  
Equation Of State ◽  
Thermodynamic Properties ◽  
Phase Behavior ◽  
Group Contribution

Modeling the phase behavior of ternary systems ionic liquid + organic + CO2with a Group Contribution Equation of State

AIChE Journal ◽  
2009 ◽  
Vol 55 (5) ◽  
pp. 1265-1273 ◽  
Author(s):  
Eliane Kühne ◽  
Angel Martin ◽  
Geert-Jan Witkamp ◽  
Cor J. Peters
Keyword(s):  
Ionic Liquid ◽  
Equation Of State ◽  
Phase Behavior ◽  
Ternary Systems ◽  
Group Contribution

Partition-Coefficient Relations for Improved Equation-of-State Description of Microemulsion-Phase Behavior

SPE Journal ◽  
2018 ◽  
Vol 23 (05) ◽  
pp. 1899-1908 ◽  
Author(s):  
V. A. Torrealba ◽  
R. T. Johns
Keyword(s):  
Equation Of State ◽  
Phase Behavior ◽  
Oil Recovery ◽  
Partition Coefficients ◽  
Behavior Modeling ◽  
Surfactant Partition Coefficients ◽  
Partitioning Coefficients ◽  
Excess Phases ◽  
Affinity Quantification ◽  
Behavior Models

Summary Surfactant-mediated enhanced-oil-recovery (EOR) techniques, such as surfactant/polymer (SP) flooding, have received increased attention because of their ability to reduce capillary forces at the pore-scale to ultralow values and mobilize trapped oil. Recently, there have been increased efforts in microemulsion-phase-behavior modeling capabilities by relying on the hydrophilic/lipophilic-difference (HLD) measure for surfactant-affinity quantification. One common assumption of most microemulsion-phase-behavior models is the assumption of pure excess phases, which states that the surfactant component is only present in the microemulsion phase. This assumption can lead to significant errors for some surfactant systems, especially when applied to chemical simulations in which discontinuities may arise. The main novelty of this paper is to allow for surfactant partitioning into both the water and oil excess phases by use of a simple approach, and then relate relevant surfactant-partitioning coefficients (i.e., K-values) to HLD. Surfactant screening that is based on surfactant-structure parameters is also considered based on estimated K-values. Key dimensionless groups are identified as a function of activity coefficients, which allow for a simplified description of the surfactant-partition coefficients. These surfactant-partition coefficients are combined with the chemical-potentials (CP) equation-of-state (EoS) model to describe and predict the phase behavior when the excess phases are not pure. Further, the developed surfactant-partitioning model can be used in other microemulsion-phase-behavior models to allow for impure excess phases.

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