Correlation of ionic liquid viscosity using Valderrama-Patel-Teja cubic equation of state and the geometric similitude concept. Part II: Binary mixtures of ionic liquids

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

Research output: Contribution to journalArticle in an indexed scientific journalpeer-review

18 Scopus citations

Abstract

The general equation of state employed in direct form, and for the first time presented in Part I of this series, is extended to correlate and predict the viscosity of binary mixtures of ionic liquids. The extension, also done for the first time, considers the classical mixing and combining rules commonly used in studies on pressure-temperature-volume equations of state, including two cases: (i) with no-interaction parameter (predictive model); and (ii) with one adjustable interaction parameter (correlating model). Data on viscosity of binary mixtures of ionic liquids have been gathered from the literature, analyzed, and selected, to finally construct a database of consistent data to obtain a general model that relates viscosity with pressure, temperature and concentration. A total of 2520 data points distributed on 344 isotherms, for 32 mixtures were considered for analysis, with average absolute relative deviations below 6%. If no interaction parameter is used, the model is still capable of predicting the viscosity of a mixture using only properties of the pure components. Results show that the model is accurate enough, being simpler and more accurate than sophisticated multiparametric models.

Original languageEnglish
Pages (from-to)178-194
Number of pages17
JournalFluid Phase Equilibria
Volume497
DOIs
StatePublished - 1 Oct 2019
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2019 Elsevier B.V.

Keywords

  • Ionic liquid
  • Mixing rules
  • Mixture viscosity
  • VPT equation of state

Types Minciencias

  • Artículos de investigación con calidad A1 / Q1

Fingerprint

Dive into the research topics of 'Correlation of ionic liquid viscosity using Valderrama-Patel-Teja cubic equation of state and the geometric similitude concept. Part II: Binary mixtures of ionic liquids'. Together they form a unique fingerprint.

Cite this