Correlation and prediction of ionic liquid viscosity using Valderrama-Patel-Teja cubic equation of state and the geometric similitude concept. Part I: Pure ionic liquids

José O. Valderrama, Luis F. Cardona, Roberto E. Rojas

Producción científica: Contribución a una revistaArtículo en revista científica indexadarevisión exhaustiva

27 Citas (Scopus)

Resumen

A generalized viscosity equation of state including a single adjustable parameter for correlating and estimating the viscosity of ionic liquids at different temperatures and pressures is proposed. The similar shape and form of the curves (isotherms and saturation lines) observed in a density-pressure-temperature plot and in a viscosity-pressure-temperature plot (ρTP and μTP plots), known as geometrical similitude, is the basis of the proposed model. Viscosity data available in the literature has been gathered, analyzed, and selected to finally construct a database of consistent data to obtain a general model. The generalized equation of state model includes a number of parameters that are determined by fitting the model using the selected experimental viscosity data of different types of ionic liquids. In total, 3857 viscosity data for 187 ionic liquids in the temperature range of 253–573 K and pressures from 1.0 up to 1500 bar have been considered. The generalized viscosity model has been compared with other existing approaches and results show that the new viscosity cubic equation of state model provides accurate and consistent results taking in account the simplicity of the generalized expressions, which contains only one adjustable parameter for each ionic liquid.
Idioma originalEspañol (Colombia)
Páginas (desde-hasta)164-177
Número de páginas14
PublicaciónFluid Phase Equilibria
Volumen497
DOI
EstadoPublicada - ene. 2019
Publicado de forma externa

Palabras clave

  • Cubic equation of state
  • Ionic liquid
  • VPT equation of state
  • Viscosity

Tipos de Productos Minciencias

  • Artículos de investigación con calidad A1 / Q1

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