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Novak N, Kontogeorgis GM, Castier M, Economou IG. Water–Hydrocarbon Phase Equilibria with SAFT-VR Mie Equation of State. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.1c00480] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Nefeli Novak
- Molecular Thermodynamics and Modelling of Materials Laboratory, National Center for Scientific Research “Demokritos”, Institute of Nanoscience and Nanotechnology, GR-153 10 Aghia Paraskevi Attikis, Greece
- Center for Energy Resources Engineering, Department of Chemical and Biochemical Engineering, Technical University of Denmark, 2800 Kgs Lyngby, Denmark
| | - Georgios M. Kontogeorgis
- Center for Energy Resources Engineering, Department of Chemical and Biochemical Engineering, Technical University of Denmark, 2800 Kgs Lyngby, Denmark
| | - Marcelo Castier
- German-Paraguayan University, 2160 San Lorenzo, Paraguay
- Chemical Engineering Program, Texas A&M University at Qatar, Education City, P.O. Box 23874, Doha, Qatar
| | - Ioannis G. Economou
- Molecular Thermodynamics and Modelling of Materials Laboratory, National Center for Scientific Research “Demokritos”, Institute of Nanoscience and Nanotechnology, GR-153 10 Aghia Paraskevi Attikis, Greece
- Chemical Engineering Program, Texas A&M University at Qatar, Education City, P.O. Box 23874, Doha, Qatar
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2
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Urbic T. Modelling water with simple Mercedes-Benz models. MOLECULAR SIMULATION 2018; 45:279-294. [PMID: 31156291 PMCID: PMC6542362 DOI: 10.1080/08927022.2018.1502430] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Accepted: 07/14/2018] [Indexed: 10/28/2022]
Abstract
The structures and properties of biomolecules like proteins, nucleic acids, and membranes depend on water. Water is also very important in industry. Overall, water is unusual substance with more than 70 anomalous properties. The understanding of water is advancing significantly due to theoretical and computational modeling. There are different kind of models, models with fine-scale properties and increasing structural detail with increasing computational expense and simple models which focus on global properties of water like thermodynamics, phase diagram and are less computational expensive. Simplified models give a better understanding of water in ways that complement more complex models. Here, we review a simple model, the two dimensional Mercedes-Benz (MB) model of water. We present results by Monte Carlo simulations for anomalies and phase diagram and application of various theoretical methods.
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Affiliation(s)
- Tomaz Urbic
- University of Ljubljana, Faculty of Chemistry and Chemical Technology,
Večna pot 113, SI-1000 Ljubljana, Slovenia
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3
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Mirzaeinia A, Feyzi F, Hashemianzadeh SM. Equations of state for the fully flexible WCA chains in the fluid and solid phases based on Wertheims-TPT2. J Chem Phys 2018; 148:104502. [PMID: 29544293 DOI: 10.1063/1.5018789] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Based on Wertheim's second order thermodynamic perturbation theory (TPT2), equations of state (EOSs) are presented for the fluid and solid phases of tangent, freely jointed spheres. It is considered that the spheres interact with each other through the Weeks-Chandler-Anderson (WCA) potential. The developed TPT2 EOS is the sum of a monomeric reference term and a perturbation contribution due to bonding. MC NVT simulations are performed to determine the structural properties of the reference system in the reduced temperature range of 0.6 ≤ T* ≤ 4.0 and the packing fraction range of 0.1 ≤ η ≤ 0.72. Mathematical functions are fitted to the simulation results of the reference system and employed in the framework of Wertheim's theory to develop TPT2 EOSs for the fluid and solid phases. The extended EOSs are compared to the MC NPT simulation results of the compressibility factor and internal energy of the fully flexible chain systems. Simulations are performed for the WCA chain system for chain lengths of up to 15 at T* = 1.0, 1.5, 2.0, 3.0. Across all the reduced temperatures, the agreement between the results of the TPT2 EOS and MC simulations is remarkable. Overall Average Absolute Relative Percent Deviation at T* = 1.0 for the compressibility factor in the entire chain lengths we covered is 0.51 and 0.77 for the solid and fluid phases, respectively. Similar features are observed in the case of residual internal energy.
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Affiliation(s)
- Ali Mirzaeinia
- Thermodynamics Research Laboratory, School of Chemical Engineering, Iran University of Science and Technology, Tehran 16846-13114, Iran
| | - Farzaneh Feyzi
- Thermodynamics Research Laboratory, School of Chemical Engineering, Iran University of Science and Technology, Tehran 16846-13114, Iran
| | - Seyed Majid Hashemianzadeh
- Molecular Simulation Research Laboratory, Department of Chemistry, Iran University of Science and Technology, Tehran 16846-13114, Iran
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Reščič J, Kalyuzhnyi YV, Cummings PT. Shielded attractive shell model again: resummed thermodynamic perturbation theory for central force potential. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2016; 28:414011. [PMID: 27545613 DOI: 10.1088/0953-8984/28/41/414011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The approach developed earlier to describe the dimerizing shielded attractive shell (SAS) primitive model of chemical association due to Cummings and Stell is generalized and extended to include a description of a polymerizing SAS model. Our extension is based on the combination of the resummed thermodynamic perturbation theory for central force (RTPT-CF) associating potential and self consistent scheme, which takes into account the changes in the system free volume due to association. Theoretical results for thermodynamical properties of the model at different bonding length, density and temperature are compared against newly generated computer simulation results. The theory gives very accurate predictions for the model with bonding length L (*) from the range 0 < L (*) < 0.6 at all values of the density and temperature studied, including the limit of infinitely large temperature.
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Affiliation(s)
- J Reščič
- Faculty of Chemistry and Chemical Technology, University of Ljubljana, 1000 Ljubljana, Slovenia
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Janeček J, Paricaud P. Size distribution of associated clusters in liquid alcohols: Interpretation of simulation results in the frame of SAFT approach. J Chem Phys 2013; 139:174502. [DOI: 10.1063/1.4827107] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
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Lafitte T, Apostolakou A, Avendaño C, Galindo A, Adjiman CS, Müller EA, Jackson G. Accurate statistical associating fluid theory for chain molecules formed from Mie segments. J Chem Phys 2013; 139:154504. [DOI: 10.1063/1.4819786] [Citation(s) in RCA: 304] [Impact Index Per Article: 27.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
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8
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Chapela GA, de Río F, Alejandre J. Molecular association of heteronuclear vibrating square-well dumbbells in liquid-vapor phase equilibrium. J Chem Phys 2011; 134:224105. [DOI: 10.1063/1.3598480] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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9
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Forte E, Llovell F, Vega LF, Trusler JPM, Galindo A. Application of a renormalization-group treatment to the statistical associating fluid theory for potentials of variable range (SAFT-VR). J Chem Phys 2011; 134:154102. [DOI: 10.1063/1.3570614] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
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10
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CUMMINGS PETERT, JACKSON GEORGE, ROWLINSON JOHNS. Keith E. Gubbins: A celebration of statistical mechanics. Mol Phys 2009. [DOI: 10.1080/00268970210142666] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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11
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Browarzik D. Calculation of excess functions and phase equilibria in binary and ternary mixtures with one associating component. J Mol Liq 2009. [DOI: 10.1016/j.molliq.2009.02.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Zhao H, Ding Y, McCabe C. Phase behavior of dipolar associating fluids from the SAFT-VR+D equation of state. J Chem Phys 2007; 127:084514. [PMID: 17764276 DOI: 10.1063/1.2756038] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
The statistical associating fluid theory for potentials of variable range plus dipole (SAFT-VR+D) is extended to study associating dipolar fluids. In the SAFT-VR+D approach dipolar interactions are taken into account through the use of the generalized mean spherical approximation to describe a reference fluid of dipolar square-well segments. This enables the effect of the dipolar interactions on the thermodynamics and structure of fluids to be explicitly described. Predictions for the thermodynamic properties and phase behavior of dipolar associating square-well monomers with one, two, and four association sites are considered and compared with new isothermal-isobaric and Gibbs ensemble Monte Carlo simulation data. The results show that the SAFT-VR+D equation provides a good description of the phase behavior of dipolar associating fluids. Additionally we have applied the new theoretical approach to study the vapor pressure and saturated liquid density of water.
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Affiliation(s)
- Honggang Zhao
- Department of Chemical Engineering, Vanderbilt University, Nashville, Tennessee 37235, USA
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Martinez A, Castro M, McCabe C, Gil-Villegas A. Predicting adsorption isotherms using a two-dimensional statistical associating fluid theory. J Chem Phys 2007; 126:074707. [PMID: 17328627 DOI: 10.1063/1.2483505] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
A molecular thermodynamics approach is developed in order to describe the adsorption of fluids on solid surfaces. The new theory is based on the statistical associating fluid theory for potentials of variable range [A. Gil-Villegas et al., J. Chem. Phys. 106, 4168 (1997)] and uses a quasi-two-dimensional approximation to describe the properties of adsorbed fluids. The theory is tested against Gibbs ensemble Monte Carlo simulations and excellent agreement with the theoretical predictions is achieved. Additionally the authors use the new approach to describe the adsorption isotherms for nitrogen and methane on dry activated carbon.
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Affiliation(s)
- Alejandro Martinez
- Instituto de Fisica, Universidad de Guanajuato, Lomas del Bosque 103, Colonia Lomas del Campestre, Leon 37150, Mexico
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Peng Y, McCabe C. Molecular simulation and theoretical modeling of polyhedral oligomeric silsesquioxanes. Mol Phys 2007. [DOI: 10.1080/00268970701189244] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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15
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Peng Y, Zhao H, Mccabe C. On the thermodynamics of diblock chain fluids from simulation and heteronuclear statistical associating fluid theory for potentials of variable range. Mol Phys 2006. [DOI: 10.1080/00268970500475901] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Lafitte T, Bessieres D, Piñeiro MM, Daridon JL. Simultaneous estimation of phase behavior and second-derivative properties using the statistical associating fluid theory with variable range approach. J Chem Phys 2006; 124:024509. [PMID: 16422613 DOI: 10.1063/1.2140276] [Citation(s) in RCA: 87] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
A modified statistical associating fluid theory (SAFT) with variable range version is presented using the family of m-n Mie potentials. The use of this intermolecular potential for modeling repulsion-dispersion interactions between the monomer segments, together with a new method for optimizing the molecular parameters of the equation of state, is found to give a very accurate description of both vapor-liquid equilibria and compressed liquid bulk properties (volumetric and derivative properties) for long-chain n-alkanes. This new equation improves other SAFT-like equations of state which fail to describe derivative properties such as the isothermal compressibility and the speed of sound in the condensed liquid phase. Emphasis is placed on pointing out that the key for modeling the latter properties is the use of a variable repulsive term in the intermolecular potential. In the case of the n-alkanes series, a clear dependence of the characteristic molecular parameters on increasing chain length is obtained, demonstrating their sound physical meaning and the consistency of the new fitting procedure proposed. This systematic method for optimizing the model parameters includes data on the saturation line as well as densities and speed of sound data in the condensed liquid phase, and the results show undoubtedly that the model performance is enhanced and its range of applicability is now widened, keeping in any case a good balance between the accuracy of the different estimated properties.
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Affiliation(s)
- Thomas Lafitte
- Laboratoire des Fluides Complexes, Groupe Haute Pression, Université de Pau et des Pays de l'Adour, B.P. 1155, 64013 Pau Cedex, France.
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BLAS FELIPEJ, DEL RÍO ELVIRAMARTÍN, DE MIGUEL ENRIQUE, JACKSON GEORGE. An examination of the vapour-liquid interface of associating fluids using a SAFT-DFT approach. Mol Phys 2001. [DOI: 10.1080/00268970110075176] [Citation(s) in RCA: 73] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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