Print Email Facebook Twitter A New Force Field for OH-for Computing Thermodynamic and Transport Properties of H2and O2in Aqueous NaOH and KOH Solutions Title A New Force Field for OH-for Computing Thermodynamic and Transport Properties of H2and O2in Aqueous NaOH and KOH Solutions Author Habibi, P. (TU Delft Engineering Thermodynamics) Rahbari, A. (TU Delft Process and Energy; TU Delft Engineering Thermodynamics) Blazquez, Samuel (Universidad Complutense de Madrid) Vega, Carlos (Universidad Complutense de Madrid) Dey, P. (TU Delft Team Poulumi Dey) Vlugt, T.J.H. (TU Delft Engineering Thermodynamics) Moultos, O. (TU Delft Engineering Thermodynamics) Department Process and Energy Date 2022 Abstract The thermophysical properties of aqueous electrolyte solutions are of interest for applications such as water electrolyzers and fuel cells. Molecular dynamics (MD) and continuous fractional component Monte Carlo (CFCMC) simulations are used to calculate densities, transport properties (i.e., self-diffusivities and dynamic viscosities), and solubilities of H2 and O2 in aqueous sodium and potassium hydroxide (NaOH and KOH) solutions for a wide electrolyte concentration range (0-8 mol/kg). Simulations are carried out for a temperature and pressure range of 298-353 K and 1-100 bar, respectively. The TIP4P/2005 water model is used in combination with a newly parametrized OH- force field for NaOH and KOH. The computed dynamic viscosities at 298 K for NaOH and KOH solutions are within 5% from the reported experimental data up to an electrolyte concentration of 6 mol/kg. For most of the thermodynamic conditions (especially at high concentrations, pressures, and temperatures) experimental data are largely lacking. We present an extensive collection of new data and engineering equations for H2 and O2 self-diffusivities and solubilities in NaOH and KOH solutions, which can be used for process design and optimization of efficient alkaline electrolyzers and fuel cells. Subject Molecular mechanicsMoleculesSolubilitySolution chemistryViscosity To reference this document use: http://resolver.tudelft.nl/uuid:5abb59d5-25af-4951-9852-6aa8d422c743 DOI https://doi.org/10.1021/acs.jpcb.2c06381 ISSN 1520-6106 Source The Journal of Physical Chemistry Part B (Biophysical Chemistry, Biomaterials, Liquids, and Soft Matter), 126 (45), 9376-9387 Part of collection Institutional Repository Document type journal article Rights © 2022 P. Habibi, A. Rahbari, Samuel Blazquez, Carlos Vega, P. Dey, T.J.H. Vlugt, O. Moultos Files PDF acs.jpcb.2c06381.pdf 3.09 MB Close viewer /islandora/object/uuid:5abb59d5-25af-4951-9852-6aa8d422c743/datastream/OBJ/view