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Title: On the calculation of solubilities via direct coexistence simulations: Investigation of NaCl aqueous solutions and Lennard-Jones binary mixtures

Journal Article · · Journal of Chemical Physics
DOI:https://doi.org/10.1063/1.4964725· OSTI ID:1465107

Direct coexistence molecular dynamics simulations of NaCl solutions and Lennard-Jones binary mixtures were performed to explore the origin of reported discrepancies between solubilities obtained by direct interfacial simulations and values obtained from the chemical potentials of the crystal and solution phases. We find that the key cause of these discrepancies is the use of crystal slabs of insufficient width to eliminate finite-size effects. We observe that for NaCl crystal slabs thicker than 4 nm (in the direction perpendicular to the interface), the same solubility values are obtained from the direct coexistence and chemical potential routes, namely, 3.7 ± 0.2 molal at T = 298.15 K and p = 1 bar for the JC-SPC/E model. Such finite-size effects are absent in the Lennard-Jones system and are likely caused by surface dipoles present in the salt crystals. We confirmed that μs-long molecular dynamics runs are required to obtain reliable solubility values from direct coexistence calculations, provided that the initial solution conditions are near the equilibrium solubility values; even longer runs are needed for equilibration of significantly different concentrations. We do not observe any effects of the exposed crystal face on the solubility values or equilibration times. For both the NaCl and Lennard-Jones systems, the use of a spherical crystallite embedded in the solution leads to significantly higher apparent solubility values relative to the flat-interface direct coexistence calculations and the chemical potential values. Finally, our results have broad implications for the determination of solubilities of molecular models of ionic systems

Research Organization:
Princeton Univ., NJ (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
SC0002128
OSTI ID:
1465107
Alternate ID(s):
OSTI ID: 1329331
Journal Information:
Journal of Chemical Physics, Vol. 145, Issue 15; ISSN 0021-9606
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 74 works
Citation information provided by
Web of Science

References (50)

Consensus on the solubility of NaCl in water from computer simulations using the chemical potential route journal March 2016
A molecular dynamics method for simulations in the canonical ensemble journal June 1984
Nucleation of NaCl from Aqueous Solution: Critical Sizes, Ion-Attachment Kinetics, and Rates journal October 2015
Determining the three-phase coexistence line in methane hydrates using computer simulations journal August 2010
Mean spherical model for asymmetric electrolytes: I. Method of solution journal November 1975
LINCS: A linear constraint solver for molecular simulations journal September 1997
Computer simulations of NaCl association in polarizable water journal March 1994
A method for computing the solubility limit of solids: Application to sodium chloride in water and alcohols journal September 2010
Calculation of the melting point of alkali halides by means of computer simulations journal September 2012
A Kirkwood–Buff derived force field for sodium chloride in water journal December 2003
Chemical Potentials, Activity Coefficients, and Solubility in Aqueous NaCl Solutions: Prediction by Polarizable Force Fields journal March 2015
Direct Coexistence Methods to Determine the Solubility of Salts in Water from Numerical Simulations. Test Case NaCl journal June 2015
Rate of homogeneous crystal nucleation in molten NaCl journal May 2005
Computing the free energy of molecular solids by the Einstein molecule approach: Ices XIII and XIV, hard-dumbbells and a patchy model of proteins journal September 2008
GROMACS 3.0: a package for molecular simulation and trajectory analysis journal August 2001
Charged hard spheres in dipolar hard sphere solvents. A model for electrolyte solutions journal February 1980
The crystal-fluid interfacial free energy and nucleation rate of NaCl from different simulation methods journal May 2015
Water activity as the determinant for homogeneous ice nucleation in aqueous solutions journal August 2000
Kinetic aspects of the thermostatted growth of ice from supercooled water in simulations journal July 2011
Prediction of the phase equilibria of methane hydrates using the direct phase coexistence methodology journal January 2015
Molecular dynamics study of salt–solution interface: Solubility and surface charge of salt in water journal April 2014
Mean ionic activity coefficients in aqueous NaCl solutions from molecular dynamics simulations journal January 2015
Polymorphic transitions in single crystals: A new molecular dynamics method journal December 1981
Recent progress in molecular simulation of aqueous electrolytes: force fields, chemical potentials and solubility journal March 2016
Determination of the melting point of hard spheres from direct coexistence simulation methods journal April 2008
Simulation of crystal growth from Lennard-Jones solutions journal December 1999
Pseudo hard-sphere potential for use in continuous molecular-dynamics simulation of spherical and chain molecules journal October 2012
Melting point and phase diagram of methanol as obtained from computer simulations of the OPLS model journal March 2010
Simulation of nucleation in almost hard-sphere colloids: The discrepancy between experiment and simulation persists journal April 2011
A new polarizable force field for alkali and halide ions journal September 2014
Temperature dependence of crystal growth of hexagonal ice (Ih) journal January 2011
Simulation of homogeneous crystal nucleation close to coexistence journal January 1996
Molecular Dynamics Simulations of the Dynamic and Energetic Properties of Alkali and Halide Ions Using Water-Model-Specific Ion Parameters journal October 2009
Molecular dynamic studies of the solubility of sodium chloride: fast calculations using seed crystalline cluster probe journal February 2015
Structural transformation in supercooled water controls the crystallization rate of ice journal November 2011
On fluid-solid direct coexistence simulations: The pseudo-hard sphere model journal October 2013
The melting lines of model systems calculated from coexistence simulations journal June 2002
Solubility of NaCl in water by molecular simulation revisited journal June 2012
Molecular force fields for aqueous electrolytes: SPC/E-compatible charged LJ sphere models and their limitations journal April 2013
Thermodynamic and Transport Properties of H 2 O + NaCl from Polarizable Force Fields journal July 2015
A smooth particle mesh Ewald method journal November 1995
Exact Solution of an Integral Equation for the Structure of a Primitive Model of Electrolytes journal April 1970
Solubility of KF and NaCl in water by molecular simulation journal January 2007
The missing term in effective pair potentials journal November 1987
Molecular Force Field Development for Aqueous Electrolytes: 1. Incorporating Appropriate Experimental Data and the Inadequacy of Simple Electrolyte Force Fields Based on Lennard-Jones and Point Charge Interactions with Lorentz–Berthelot Rules journal October 2013
Temperature-dependent solubilities and mean ionic activity coefficients of alkali halides in water from molecular dynamics simulations journal July 2015
A molecular dynamics method for simulations in the canonical ensemble journal January 2002
Structural transformation in supercooled water controls the crystallization rate of ice text January 2011
Calculation of the melting point of alkali halides by means of computer simulations text January 2012
Recent Progress in Molecular Simulation of Aqueous Electrolytes: Force Fields, Chemical Potentials and Solubility text January 2016

Cited By (25)

Solubility prediction from first principles: a density of states approach journal January 2018
Nucleation of urea from aqueous solution: Structure, critical size, and rate journal April 2017
Computational methodology for solubility prediction: Application to the sparingly soluble solutes journal June 2017
Charge compensation at the interface between the polar NaCl(111) surface and a NaCl aqueous solution journal September 2017
A potential model for sodium chloride solutions based on the TIP4P/2005 water model journal September 2017
Forward flux sampling calculation of homogeneous nucleation rates from aqueous NaCl solutions journal January 2018
NaCl nucleation from brine in seeded simulations: Sources of uncertainty in rate estimates journal June 2018
Chemical potentials of alkaline earth metal halide aqueous electrolytes and solubility of their hydrates by molecular simulation: Application to CaCl 2 , antarcticite, and sinjarite journal June 2018
Addressing hysteresis and slow equilibration issues in cavity-based calculation of chemical potentials journal July 2018
Computational methodology for solubility prediction: Application to sparingly soluble organic/inorganic materials journal August 2018
Communication: Nucleation rates of supersaturated aqueous NaCl using a polarizable force field journal October 2018
Calculation of the water-octanol partition coefficient of cholesterol for SPC, TIP3P, and TIP4P water journal December 2018
Nucleation in aqueous NaCl solutions shifts from 1-step to 2-step mechanism on crossing the spinodal journal March 2019
Solubility of paracetamol in ethanol by molecular dynamics using the extended Einstein crystal method and experiments journal March 2019
Carbon solubility in liquid silicon: A computational analysis across empirical potentials journal April 2019
Thermodynamic analysis of the stability of planar interfaces between coexisting phases and its application to supercooled water journal June 2019
Solubility prediction for a soluble organic molecule via chemical potentials from density of states journal November 2019
A force field of Li + , Na + , K + , Mg 2+ , Ca 2+ , Cl , and SO42− in aqueous solution based on the TIP4P/2005 water model and scaled charges for the ions journal October 2019
Ion dissolution mechanism and kinetics at kink sites on NaCl surfaces journal January 2018
Molecular dynamics simulation of the surface tension of aqueous sodium chloride: from dilute to highly supersaturated solutions and molten salt journal January 2018
Charge compensation at the interface between the polar NaCl(111) surface and a NaCl aqueous solution text January 2017
Computational methodology for solubility prediction: Application to sparingly soluble organic/inorganic materials. text January 2018
Addressing hysteresis and slow equilibration issues in cavity-based calculation of chemical potentials. text January 2018
Computational methodology for solubility prediction: Application to the sparingly soluble solutes text January 2017
Molecular Dynamics Simulation of the Surface Tension of Aqueous Sodium Chloride: from Dilute to Highly Supersaturated Solutions and Molten Salt journal November 2017

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