4.5 Article

Prediction of density, viscosity, and conductivity of the ternary aqueous solutions of piperidinium-based ionic liquids at different temperatures and atmospheric pressure using the data of their binary subsystems

Journal

FLUID PHASE EQUILIBRIA
Volume 383, Issue -, Pages 55-71

Publisher

ELSEVIER
DOI: 10.1016/j.fluid.2014.09.020

Keywords

Ionic liquids; Aqueous solutions; Density; Viscosity; Conductivity; Predictive equation

Funding

  1. National Natural Science Foundation of China [21276271, 21076224]
  2. Science Foundation of China University of Petroleum, Beijing [qzdx-2011-01]

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The densities, viscosities, and conductivities of the ternary solutions [N-EMP]Br (N-ethyl,methyl-piperidinium bromide) + [N-PMP]Br (N-propyl,methyl-piperidinium bromide) + H2O, [N-EMP]Br + [N-BMP]Br (N-butyl,methyl-piperidinium bromide) + H2O, and [N-PMP]Br + [N-BMP]Br + H2O and their binary subsystems at (293.15, 298.15, 303.15, and 308.15) K and atmospheric pressure were measured. The equations for prediction of the density, viscosity, and conductivity of mixed electrolyte solutions were extended to predict the related properties of mixed ionic liquid solutions. The predicted values agree well with the experimental data, indicating that the examined properties of the ternary aqueous solutions of piperidinium-based ILs can well be predicted from the corresponding data of their binary subsystems of equal ionic strength by using these equations. In addition, the equation of Patwardhan and Kumar, Hu's equation, and Young's rule can provide better predictions than the simple equations. (C) 2014 Elsevier B.V. All rights reserved.

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