1
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Naseri Boroujeni S, Maribo-Mogensen B, Liang X, Kontogeorgis GM. Theoretical and practical investigation of ion-ion association in electrolyte solutions. J Chem Phys 2024; 160:154509. [PMID: 38639315 DOI: 10.1063/5.0198308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2024] [Accepted: 03/26/2024] [Indexed: 04/20/2024] Open
Abstract
In this study, we present a new equation of state for electrolyte solutions, integrating the statistical associating fluid theory for variable range interactions utilizing the generic Mie form and binding Debye-Hückel theories. This equation of state underscores the pivotal role of ion-ion association in determining the properties of electrolyte solutions. We propose a unified framework that simultaneously examines the thermodynamic properties of electrolyte solutions and their electrical conductivity, given the profound impact of ion pairing on this transport property. Using this equation of state, we predict the liquid density, mean ionic activity coefficient, and osmotic coefficient for binary NaCl, Na2SO4, and MgSO4 aqueous solutions at 298.15 K. Additionally, we evaluate the molar conductivity of these systems by considering the fraction of free ions derived from our equation of state in conjunction with two advanced electrical conductivity models. Our results reveal that, while ion-ion association has a minimal influence on the modification of the predicted properties of sodium chloride solutions, their impact on sodium and magnesium sulfate solutions is considerably more noticeable.
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Affiliation(s)
- Saman Naseri Boroujeni
- Center for Energy Resources Engineering, Department of Chemical and Biochemical Engineering, Technical University of Denmark (DTU), Søltofts Plads, Building 229, 2800 Kgs. Lyngby, Denmark
| | - B Maribo-Mogensen
- Hafnium Labs ApS., Vestergade 16, 3rd floor, 1456 Copenhagen, Denmark
| | - X Liang
- Center for Energy Resources Engineering, Department of Chemical and Biochemical Engineering, Technical University of Denmark (DTU), Søltofts Plads, Building 229, 2800 Kgs. Lyngby, Denmark
| | - G M Kontogeorgis
- Center for Energy Resources Engineering, Department of Chemical and Biochemical Engineering, Technical University of Denmark (DTU), Søltofts Plads, Building 229, 2800 Kgs. Lyngby, Denmark
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2
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Kalhor P, Sun Z, Yu Z. Spectroscopic and Computational Study of ZnCl 2-Methanol Low-Melting-Temperature Mixtures. J Phys Chem B 2024. [PMID: 38424008 DOI: 10.1021/acs.jpcb.4c00469] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2024]
Abstract
Alcoholic electrolyte mixtures have wide applications in industries. In this study, a series of mixtures composed of ZnCl2 and methanol (MeOH) with ZnCl2 mol % from 6.7 to 25 were prepared, and their spectral, structural, and thermodynamic properties were studied using infrared (IR) spectroscopy, differential scanning calorimetry (DSC), and density functional theory (DFT) calculations. The DFT-assisted analysis of excess spectra, supported by 2D-correlation spectroscopy, led to the identification of the major constituents of ZnCl2-MeOH mixtures, namely, MeOH monomer, MeOH dimer, and ZnCl2-3MeOH complex, produced after dissociation of MeOH trimer which represents the bulk methanol. The Hirshfeld charge analysis showed that in the competition between the O-H···Cl hydrogen bond (H-bond) and Zn ← O coordination bond to transfer charge in ZnCl2-MeOH complexes, the latter always dominates, making MeOH positively charged. The phase diagram of the binary system showed the presence of V-shaped glass transition temperatures (Tg), characteristic of low-melting mixture solvents (LoMMSs). The present study provides insights into the microscopic properties of the system and sheds light on the understanding of the general principles to prepare deep-eutectic solvents (DESs) or LoMMSs using inorganic salts and alcoholic compounds.
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Affiliation(s)
- Payam Kalhor
- MOE Key Laboratory of Bioorganic Phosphorous Chemistry and Chemical Biology, Department of Chemistry, Tsinghua University, Beijing 100084, China
- Institute of Nanotechnology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
- Institute of Theoretical Informatics, Karlsruhe Institute of Technology, Am Fasanengarten 5, 76131 Karlsruhe, Germany
| | - Zhaoxi Sun
- Changping Laboratory, Beijing 102206, China
| | - Zhiwu Yu
- MOE Key Laboratory of Bioorganic Phosphorous Chemistry and Chemical Biology, Department of Chemistry, Tsinghua University, Beijing 100084, China
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3
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Novak N, Kontogeorgis GM, Castier M, Economou IG. Mixed Solvent Electrolyte Solutions: A Review and Calculations with the eSAFT-VR Mie Equation of State. Ind Eng Chem Res 2023; 62:13646-13665. [PMID: 37663168 PMCID: PMC10472441 DOI: 10.1021/acs.iecr.3c00717] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Revised: 06/04/2023] [Accepted: 06/09/2023] [Indexed: 09/05/2023]
Abstract
In this work, mixed-solvent mean ionic activity coefficients (MIAC), vapor-liquid equilibrium (VLE), and liquid-liquid equilibrium (LLE) of electrolyte solutions have been addressed. An extended literature review of existing electrolyte activity coefficient models (eGE) and electrolyte equations of state (eEoS) for modeling mixed solvent electrolyte systems is first presented, focusing on the details of the models in terms of physical and electrolyte terms, relative static permittivity, and parameterization. The analysis of this literature reveals that the property predictions can be ranked, from the easiest to the most difficult, in the following order: VLE, MIAC, and LLE. We have then used our previously developed eSAFT-VR Mie model to predict MIAC, VLE, and LLE in mixed solvents without fitting any new adjustable parameters. The model was parameterized on MIAC of aqueous electrolyte solutions and successfully extended to nonaqueous, single solvent electrolyte solutions without any new adjustable parameters by using a salt-dependent expression for the relative static permittivity. Our approach yields excellent results for MIAC and VLE of mixed solvent electrolyte solutions, while being fully predictive. LLE is significantly more challenging, and an accurate model for the salt-free solution is crucial for accurate calculations. When the compositions of the two phases in the binary salt-free system are accurately captured, then the electrolyte extension of our model shows a lot of potential and is currently among the best eEoS for LLE prediction in the literature.
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Affiliation(s)
- Nefeli Novak
- National
Center for Scientific Research “Demokritos”, Institute of Nanoscience and Nanotechnology, Molecular
Thermodynamics and Modelling of Materials Laboratory, 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
- Chemical
Engineering Program, Texas A&M University
at Qatar, Education City, PO Box 23874, Doha, Qatar
- Polytechnic
Faculty, National University of Asunción, 2111 San Lorenzo, Paraguay
| | - Ioannis G. Economou
- National
Center for Scientific Research “Demokritos”, Institute of Nanoscience and Nanotechnology, Molecular
Thermodynamics and Modelling of Materials Laboratory, GR-153 10 Aghia
Paraskevi Attikis, Greece
- Chemical
Engineering Program, Texas A&M University
at Qatar, Education City, PO Box 23874, Doha, Qatar
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4
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Simonin JP. Further reflections about the “Born” term used in thermodynamic models for electrolytes. J Mol Liq 2023. [DOI: 10.1016/j.molliq.2023.121713] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/30/2023]
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5
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Tong J, Peng B, Kontogeorgis GM, Liang X. Behavior of the aqueous sodium chloride solutions from molecular simulations and theories. J Mol Liq 2023. [DOI: 10.1016/j.molliq.2022.121086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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6
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Kournopoulos S, Santos MS, Ravipati S, Haslam AJ, Jackson G, Economou IG, Galindo A. The Contribution of the Ion-Ion and Ion-Solvent Interactions in a Molecular Thermodynamic Treatment of Electrolyte Solutions. J Phys Chem B 2022; 126:9821-9839. [PMID: 36395498 PMCID: PMC9720728 DOI: 10.1021/acs.jpcb.2c03915] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Developing molecular equations of state to treat electrolyte solutions is challenging due to the long-range nature of the Coulombic interactions. Seminal approaches commonly used are the mean spherical approximation (MSA) and the Debye-Hückel (DH) theory to account for ion-ion interactions and, often, the Born theory of solvation for ion-solvent interactions. We investigate the accuracy of the MSA and DH approaches using each to calculate the contribution of the ion-ion interactions to the chemical potential of NaCl in water, comparing these with newly computer-generated simulation data; the ion-ion contribution is isolated by selecting an appropriate primitive model with a Lennard-Jones force field to describe the solvent. A study of mixtures with different concentrations and ionic strengths reveals that the calculations from both MSA and DH theories are of similar accuracy, with the MSA approach resulting in marginally better agreement with the simulation data. We also demonstrate that the Born theory provides a good qualitative description of the contribution of the ion-solvent interactions; we employ an explicitly polar water model in these simulations. Quantitative agreement up to moderate salt concentrations and across the relevant range of temperature is achieved by adjusting the Born radius using simulation data of the free energy of solvation. We compute the radial and orientational distribution functions of the systems, thereby providing further insight on the differences observed between the theory and simulation. We thus provide rigorous benchmarks for use of the MSA, DH, and Born theories as perturbation approaches, which will be of value for improving existing models of electrolyte solutions, especially in the context of equations of state.
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Affiliation(s)
- Spiros Kournopoulos
- Department
of Chemical Engineering, Sargent Centre for Process Systems Engineering,
and Institute for Molecular Science and Engineering, Imperial College, London, London SW7 2AZ, United Kingdom
| | - Mirella Simões Santos
- Laboratoire
de Chimie, École Normale Supérieure
de Lyon, 46 Allée d’Italie, 69364 Lyon, France,Australian
Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Srikanth Ravipati
- Department
of Chemical Engineering, Sargent Centre for Process Systems Engineering,
and Institute for Molecular Science and Engineering, Imperial College, London, London SW7 2AZ, United Kingdom
| | - Andrew J. Haslam
- Department
of Chemical Engineering, Sargent Centre for Process Systems Engineering,
and Institute for Molecular Science and Engineering, Imperial College, London, London SW7 2AZ, United Kingdom
| | - George Jackson
- Department
of Chemical Engineering, Sargent Centre for Process Systems Engineering,
and Institute for Molecular Science and Engineering, Imperial College, London, London SW7 2AZ, United Kingdom
| | - Ioannis G. Economou
- Chemical
Engineering Program, Texas A&M University
at Qatar, Doha 23874, Qatar
| | - Amparo Galindo
- Department
of Chemical Engineering, Sargent Centre for Process Systems Engineering,
and Institute for Molecular Science and Engineering, Imperial College, London, London SW7 2AZ, United Kingdom,
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7
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Modelling of Mean Ionic Activity and Osmotic Coefficients in Aqueous Solutions of Symmetrical Tetra alkyl Ammonium Halides. J SOLUTION CHEM 2022. [DOI: 10.1007/s10953-022-01211-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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8
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Yang F, Ngo TD, Kontogeorgis GM, de Hemptinne JC. A Benchmark Database for Mixed-Solvent Electrolyte Solutions: Consistency Analysis Using E-NRTL. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c00059] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Fufang Yang
- IFP Energies Nouvelles, 1 et 4 Avenue de Bois-Préau, CEDEX 92852 Rueil-Malmaison, France
- Center for Energy Resources Engineering (CERE), Department of Chemical and Biochemical Engineering, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
| | - Tri Dat Ngo
- IFP Energies Nouvelles, 1 et 4 Avenue de Bois-Préau, CEDEX 92852 Rueil-Malmaison, France
| | - Georgios M. Kontogeorgis
- Center for Energy Resources Engineering (CERE), Department of Chemical and Biochemical Engineering, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
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9
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Costa Reis M. Current Trends in Predictive Methods and Electrolyte Equations of State. ACS OMEGA 2022; 7:16847-16855. [PMID: 35647467 PMCID: PMC9134406 DOI: 10.1021/acsomega.2c00168] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/09/2022] [Accepted: 04/28/2022] [Indexed: 06/15/2023]
Abstract
Over the past 20-30 years, the development of thermodynamic models for electrolyte solutions has experienced remarkable progress. While in the first half of the 20th century, the thermodynamic models were essentially based on the continuum electrostatic approach, nowadays equations of state and predictive methods have been adapted to deal with electrolyte solutions. Given this panorama, in this mini-review, the recent advances in predictive methods and electrolyte equations of state are examined, as well as their performance in predicting activity coefficients and solid-liquid phase equilibrium data. Although this mini-review aims to shed light on the current progress in predictive methods and electrolyte equations of state, it also provides valuable references and information to the several models and theories that form the backbone of the thermodynamics of electrolyte solutions.
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10
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Kournopoulos S, Haslam AJ, Jackson G, Galindo A, Schoen M. Molecular theory of the static dielectric constant of dipolar fluids. J Chem Phys 2022; 156:154111. [PMID: 35459323 DOI: 10.1063/5.0079511] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The link between the static dielectric constant and the microscopic intermolecular interactions is the Kirkwood g1 factor, which depends on the orientational structure of the fluid. Over the years, there have been several attempts to provide an accurate description of the orientational structure of dipolar fluids using molecular theories. However, these approaches were either limited to mean-field approximations for the pair correlation function or, more recently, limited to adjusting the orientational dependence to simulation data. Here, we derive a theory for the dielectric constant of dipolar hard-sphere fluids using the augmented modified mean-field approximation. Qualitative agreement is achieved throughout all relevant thermodynamic states, as demonstrated by a comparison with simulation data from the literature. Excellent quantitative agreement can be obtained using a single empirical scaling factor, the physical origin of which is analyzed and accounted for. In order to predict the dielectric constant of the Stockmayer fluid (Lennard-Jones plus dipole potential), we use an adjusted version of the expression for the dipolar hard-sphere fluid. Comparing theoretical predictions with newly generated simulation data, we show that it is possible to obtain excellent agreement with simulation by performing the calculations at a corresponding state using the same scaling factor. Finally, we compare the theoretical orientational structure of the Stockmayer fluid with that obtained from simulations. The simulated structure is calculated following a post-processing methodology that we introduce by deriving an original expression that relates the proposed theory to the histogram of relative dipole angles.
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Affiliation(s)
- S Kournopoulos
- Department of Chemical Engineering, Centre for Process Systems Engineering and Institute for Molecular Science and Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, United Kingdom
| | - A J Haslam
- Department of Chemical Engineering, Centre for Process Systems Engineering and Institute for Molecular Science and Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, United Kingdom
| | - G Jackson
- Department of Chemical Engineering, Centre for Process Systems Engineering and Institute for Molecular Science and Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, United Kingdom
| | - A Galindo
- Department of Chemical Engineering, Centre for Process Systems Engineering and Institute for Molecular Science and Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, United Kingdom
| | - M Schoen
- Department of Chemical Engineering, Centre for Process Systems Engineering and Institute for Molecular Science and Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, United Kingdom
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11
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Novak N, Kontogeorgis GM, Castier M, Economou IG. Modeling of Gas Solubility in Aqueous Electrolyte Solutions with the eSAFT-VR Mie Equation of State. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.1c02923] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Nefeli Novak
- National Center for Scientific Research “Demokritos”, Institute of Nanoscience and Nanotechnology, Molecular Thermodynamics and Modelling of Materials Laboratory, Aghia Paraskevi Attikis GR−153 10, Greece
- Center for Energy Resources Engineering, Department of Chemical and Biochemical Engineering, Technical University of Denmark, Kgs Lyngby 2800, Denmark
| | - Georgios M. Kontogeorgis
- Center for Energy Resources Engineering, Department of Chemical and Biochemical Engineering, Technical University of Denmark, Kgs Lyngby 2800, Denmark
| | - Marcelo Castier
- Universidad Paraguayo Alemana, 1279 Lope de Vega, San Lorenzo 1279, Paraguay
- Chemical Engineering Program, Education City, Texas A&M University at Qatar, P.O. Box 23874, Doha 23874, Qatar
| | - Ioannis G. Economou
- National Center for Scientific Research “Demokritos”, Institute of Nanoscience and Nanotechnology, Molecular Thermodynamics and Modelling of Materials Laboratory, Aghia Paraskevi Attikis GR−153 10, Greece
- Chemical Engineering Program, Education City, Texas A&M University at Qatar, P.O. Box 23874, Doha 23874, Qatar
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12
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Sun L, Liang J. Thermodynamic modeling of gas solubility in aqueous sodium chloride solution. Chin J Chem Eng 2021. [DOI: 10.1016/j.cjche.2020.09.056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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13
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Sun L, Liang X, von Solms N, Kontogeorgis GM. Solubility Modeling of Air in Aqueous Electrolyte Solutions with the e-CPA Equation of State. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c03164] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Li Sun
- Center for Energy Resources Engineering, Department of Chemical and Biochemical Engineering, Technical University of Denmark, Søltofts Plads, Building 229, 2800 Kgs. Lyngby, Denmark
| | - Xiaodong Liang
- Center for Energy Resources Engineering, Department of Chemical and Biochemical Engineering, Technical University of Denmark, Søltofts Plads, Building 229, 2800 Kgs. Lyngby, Denmark
| | - Nicolas von Solms
- Center for Energy Resources Engineering, Department of Chemical and Biochemical Engineering, Technical University of Denmark, Søltofts Plads, Building 229, 2800 Kgs. Lyngby, Denmark
| | - Georgios M. Kontogeorgis
- Center for Energy Resources Engineering, Department of Chemical and Biochemical Engineering, Technical University of Denmark, Søltofts Plads, Building 229, 2800 Kgs. Lyngby, Denmark
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14
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Lei Q, Peng B, Sun L, Luo J, Chen Y, Kontogeorgis GM, Liang X. Predicting activity coefficients with the
Debye–Hückel
theory using concentration dependent static permittivity. AIChE J 2020. [DOI: 10.1002/aic.16651] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Qun Lei
- Research Institute of Petroleum Exploration & Development (RIPED), PetroChina Beijing China
| | - Baoliang Peng
- Research Institute of Petroleum Exploration & Development (RIPED), PetroChina Beijing China
- Key Laboratory of Nano Chemistry (KLNC) CNPC Beijing China
| | - Li Sun
- Center for Energy Resources Engineering, Department of Chemical and Biochemical Engineering Technical University of Denmark Kgs. Lyngby Denmark
| | - Jianhui Luo
- Research Institute of Petroleum Exploration & Development (RIPED), PetroChina Beijing China
- Key Laboratory of Nano Chemistry (KLNC) CNPC Beijing China
| | - Yuan Chen
- Center for Energy Resources Engineering, Department of Chemical and Biochemical Engineering Technical University of Denmark Kgs. Lyngby Denmark
| | - Georgios M. Kontogeorgis
- Center for Energy Resources Engineering, Department of Chemical and Biochemical Engineering Technical University of Denmark Kgs. Lyngby Denmark
| | - Xiaodong Liang
- Center for Energy Resources Engineering, Department of Chemical and Biochemical Engineering Technical University of Denmark Kgs. Lyngby Denmark
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15
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Kohns M, Lazarou G, Kournopoulos S, Forte E, Perdomo FA, Jackson G, Adjiman CS, Galindo A. Predictive models for the phase behaviour and solution properties of weak electrolytes: nitric, sulphuric, and carbonic acids. Phys Chem Chem Phys 2020; 22:15248-15269. [PMID: 32609107 DOI: 10.1039/c9cp06795g] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The distribution of ionic species in electrolyte systems is important in many fields of science and engineering, ranging from the study of degradation mechanisms to the design of systems for electrochemical energy storage. Often, other phenomena closely related to ionic speciation, such as ion pairing, clustering and hydrogen bonding, which are difficult to investigate experimentally, are also of interest. Here, we develop an accurate molecular approach, accounting for reactions as well as association and ion pairing, to deliver a predictive framework that helps validate experiment and guides future modelling of speciation phenomena of weak electrolytes. We extend the SAFT-VRE Mie equation of state [D. K. Eriksen et al., Mol. Phys., 2016, 114, 2724-2749] to study aqueous solutions of nitric, sulphuric, and carbonic acids, considering complete and partially dissociated models. In order to incorporate the dissociation equilibria, correlations to experimental data for the relevant thermodynamic equilibrium constants of the dissociation reactions are taken from the literature and are imposed as a boundary condition in the calculations. The models for water, the hydronium ion, and carbon dioxide are treated as transferable and are taken from our previous work. We present new molecular models for nitric acid, and the nitrate, bisulfate, sulfate, and bicarbonate anions. The resulting framework is used to predict a range of phase behaviour and solution properties of the aqueous acids over wide ranges of concentration and temperature, including the degree of dissociation, as well as the activity coefficients of the ionic species, and the activity of water and osmotic coefficient, density, and vapour pressure of the solutions. The SAFT-VRE Mie models obtained in this manner provide a means of elucidating the mechanisms of association and ion pairing in the systems studied, complementing the experimental observations reported in the literature.
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Affiliation(s)
- Maximilian Kohns
- Department of Chemical Engineering, Centre for Process Systems Engineering and Institute for Molecular Science and Engineering, South Kensington Campus, Imperial College London, London SW7 2AZ, UK.
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16
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Sun L, Kontogeorgis GM, von Solms N, Liang X. Modeling of Gas Solubility Using the Electrolyte Cubic Plus Association Equation of State. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b03335] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Li Sun
- Center for Energy Resources Engineering, Department of Chemical and Biochemical Engineering, Technical University of Denmark, 2800-Kongens Lyngby, Denmark
| | - Georgios M. Kontogeorgis
- Center for Energy Resources Engineering, Department of Chemical and Biochemical Engineering, Technical University of Denmark, 2800-Kongens Lyngby, Denmark
| | - Nicolas von Solms
- Center for Energy Resources Engineering, Department of Chemical and Biochemical Engineering, Technical University of Denmark, 2800-Kongens Lyngby, Denmark
| | - Xiaodong Liang
- Center for Energy Resources Engineering, Department of Chemical and Biochemical Engineering, Technical University of Denmark, 2800-Kongens Lyngby, Denmark
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17
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Simonin JP. On the "Born" term used in thermodynamic models for electrolytes. J Chem Phys 2019; 150:244503. [PMID: 31255078 DOI: 10.1063/1.5096598] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
In the literature, many expressions for the Helmholtz or Gibbs energy of electrolyte solutions have included a term that takes into account the variation of the solution permittivity with the composition of solution (e.g., within the statistical-associated fluid theory formalism). This contribution is often called the "Born" term because it was inspired by the classic expression established by Born to describe the solvation energy of an ion. The present work is an attempt to get more physical insight into this semiempirical "Born" term. The way in which it has been used in the literature is briefly examined, and its typical magnitude is evaluated. Next, it is proposed to use the nonprimitive mean spherical approximation model to calculate the chemical potential of an ion in a solution composed of charged hard spheres (HSs) (the ions) and dipolar HSs (the solvent). The cation and the anion are monovalent monoatomic ions of equal diameter. The dipoles have a different size and mimic water molecules. The theoretical expressions for this model were found to fulfill the Gibbs-Duhem relation, which suggests that they are correct. A rescaled ion-dipole contribution is introduced, in a form that is suitable for inclusion in electrolyte models. It is compared with a "Born" term expressed in the same framework. It is found that the former is in general not well estimated by the latter. The two might even be of opposite signs in the case of ions of sufficiently small size.
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Affiliation(s)
- Jean-Pierre Simonin
- Laboratoire PHENIX, CNRS, Sorbonne Université (Campus P.M. Curie), 4 Place Jussieu, Case 51, F-75005 Paris, France
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18
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Ebrahimi A, Pazuki G, Naderifar A. Assessment of the Ion-SAFT-VR EOS for estimation of metal sulfates solubility at high temperature acid leaching process. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.02.031] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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19
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Chen H, Masters AJ, Taylor R, Jobson M, Woodhead D. Application of SAFT-VRE in the Flowsheet Simulation of an Advanced PUREX Process. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.8b05606] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hongyan Chen
- School of Chemical Engineering and Analytical Science, University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| | - Andrew J. Masters
- School of Chemical Engineering and Analytical Science, University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| | - Robin Taylor
- National Nuclear Laboratory, Central Laboratory, Sellafield, Seascale, Cumbria CA20 1PG, U.K
| | - Megan Jobson
- School of Chemical Engineering and Analytical Science, University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| | - David Woodhead
- National Nuclear Laboratory, Central Laboratory, Sellafield, Seascale, Cumbria CA20 1PG, U.K
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20
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Gerlach T, Müller S, Smirnova I. Development of a COSMO-RS based model for the calculation of phase equilibria in electrolyte systems. AIChE J 2017. [DOI: 10.1002/aic.15875] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Thomas Gerlach
- Institute of Thermal Separation Processes; Hamburg University of Technology; Eißendorfer Straße 38, Hamburg D-21073 Germany
| | - Simon Müller
- Institute of Thermal Separation Processes; Hamburg University of Technology; Eißendorfer Straße 38, Hamburg D-21073 Germany
| | - Irina Smirnova
- Institute of Thermal Separation Processes; Hamburg University of Technology; Eißendorfer Straße 38, Hamburg D-21073 Germany
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Eriksen DK, Lazarou G, Galindo A, Jackson G, Adjiman CS, Haslam AJ. Development of intermolecular potential models for electrolyte solutions using an electrolyte SAFT-VR Mie equation of state. Mol Phys 2016. [DOI: 10.1080/00268976.2016.1236221] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Daniel K. Eriksen
- Department of Chemical Engineering, Qatar Carbonates and Carbon Storage Research Centre, Imperial College London, South Kensington Campus, London SW7 2AZ, United Kingdom
- Department of Chemical Engineering, Centre for Process Systems Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, United Kingdom
| | - Georgia Lazarou
- Department of Chemical Engineering, Centre for Process Systems Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, United Kingdom
| | - Amparo Galindo
- Department of Chemical Engineering, Qatar Carbonates and Carbon Storage Research Centre, Imperial College London, South Kensington Campus, London SW7 2AZ, United Kingdom
- Department of Chemical Engineering, Centre for Process Systems Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, United Kingdom
| | - George Jackson
- Department of Chemical Engineering, Qatar Carbonates and Carbon Storage Research Centre, Imperial College London, South Kensington Campus, London SW7 2AZ, United Kingdom
- Department of Chemical Engineering, Centre for Process Systems Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, United Kingdom
| | - Claire S. Adjiman
- Department of Chemical Engineering, Centre for Process Systems Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, United Kingdom
| | - Andrew J. Haslam
- Department of Chemical Engineering, Qatar Carbonates and Carbon Storage Research Centre, Imperial College London, South Kensington Campus, London SW7 2AZ, United Kingdom
- Department of Chemical Engineering, Centre for Process Systems Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, United Kingdom
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22
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Brand CV, Graham E, Rodríguez J, Galindo A, Jackson G, Adjiman CS. On the use of molecular-based thermodynamic models to assess the performance of solvents for CO 2 capture processes: monoethanolamine solutions. Faraday Discuss 2016; 192:337-390. [PMID: 27604680 DOI: 10.1039/c6fd00041j] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Predictive models play an important role in the design of post-combustion processes for the capture of carbon dioxide (CO2) emitted from power plants. A rate-based absorber model is presented to investigate the reactive capture of CO2 using aqueous monoethanolamine (MEA) as a solvent, integrating a predictive molecular-based equation of state: SAFT-VR SW (Statistical Associating Fluid Theory-Variable Range, Square Well). A distinctive physical approach is adopted to model the chemical equilibria inherent in the process. This eliminates the need to consider reaction products explicitly and greatly reduces the amount of experimental data required to model the absorber compared to the more commonly employed chemical approaches. The predictive capabilities of the absorber model are analyzed for profiles from 10 pilot plant runs by considering two scenarios: (i) no pilot-plant data are used in the model development; (ii) only a limited set of pilot-plant data are used. Within the first scenario, the mass fraction of CO2 in the clean gas is underestimated in all but one of the cases, indicating that a best-case performance of the solvent can be obtained with this predictive approach. Within the second scenario a single parameter is estimated based on data from a single pilot plant run to correct for the dramatic changes in the diffusivity of CO2 in the reactive solvent. This parameter is found to be transferable for a broad range of operating conditions. A sensitivity analysis is then conducted, and the liquid viscosity and diffusivity are found to be key properties for the prediction of the composition profiles. The temperature and composition profiles are sensitive to thermodynamic properties that correspond to major sources of heat generation or dissipation. The proposed modelling framework can be used as an early assessment of solvents to aid in narrowing the search space, and can help in determining target solvents for experiments and more detailed modelling.
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Affiliation(s)
- Charles V Brand
- Department of Chemical Engineering, Centre for Process Systems Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, UK.
| | - Edward Graham
- Department of Chemical Engineering, Centre for Process Systems Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, UK.
| | - Javier Rodríguez
- Department of Chemical Engineering, Centre for Process Systems Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, UK.
| | - Amparo Galindo
- Department of Chemical Engineering, Centre for Process Systems Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, UK.
| | - George Jackson
- Department of Chemical Engineering, Centre for Process Systems Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, UK.
| | - Claire S Adjiman
- Department of Chemical Engineering, Centre for Process Systems Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, UK.
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23
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Das G, Hlushak S, dos Ramos MC, McCabe C. Predicting the thermodynamic properties and dielectric behavior of electrolyte solutions using the SAFT-VR+DE equation of state. AIChE J 2015. [DOI: 10.1002/aic.14909] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Gaurav Das
- Dept. of Chemical and Biomolecular Engineering; Vanderbilt University; Nashville TN 37235
| | - Stepan Hlushak
- Dept. of Chemical and Biomolecular Engineering; Vanderbilt University; Nashville TN 37235
| | - M. Carolina dos Ramos
- Dept. of Chemical and Biomolecular Engineering; Vanderbilt University; Nashville TN 37235
| | - Clare McCabe
- Dept. of Chemical and Biomolecular Engineering; Vanderbilt University; Nashville TN 37235
- Dept. of Chemistry; Vanderbilt University; Nashville TN 37235
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24
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Valiskó M, Boda D. Unraveling the Behavior of the Individual Ionic Activity Coefficients on the Basis of the Balance of Ion–Ion and Ion–Water Interactions. J Phys Chem B 2015; 119:1546-57. [DOI: 10.1021/jp509445k] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mónika Valiskó
- Department of Physical Chemistry, University of Pannonia, P.O. Box 158, H-8201 Veszprém, Hungary
| | - Dezső Boda
- Department of Physical Chemistry, University of Pannonia, P.O. Box 158, H-8201 Veszprém, Hungary
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25
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Toward Sustainable Solvent-Based Postcombustion CO2 Capture. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/b978-0-444-63472-6.00011-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
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