Viscosity and Liquid Density of Asymmetric n-Alkane Mixtures: Measurement and Modelling

António J. Queimada, Isabel M. Marrucho, João A.P. Coutinho, Erling Halfdan Stenby

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Viscosity and liquid density Measurements were performed, at atmospheric pressure. in pure and mixed n-decane. n-eicosane, n-docosane, and n-tetracosane from 293.15 K (or above the melting point) up to 343.15 K. The viscosity was determined with a rolling ball viscometer and liquid densities with a vibrating U-tube densimeter. Pure component results agreed, oil average, with literature values within 0.2% for liquid density and 3% for viscosity. The measured data were used to evaluate the performance of two models for their predictions: the friction theory coupled with the Peng-Robinson equation of state and a corresponding states model recently proposed for surface tension, viscosity, vapor pressure, and liquid densities of the series of n-alkanes. Advantages and shortcoming of these models are discussed.
Original languageEnglish
JournalInternational Journal of Thermophysics
Issue number1
Pages (from-to)47-61
Publication statusPublished - 2005
EventSymposium on Thermophysical Properties - Boulder, United States
Duration: 22 Jun 200327 Jun 2003
Conference number: 15


ConferenceSymposium on Thermophysical Properties
CountryUnited States


  • n-eicosane
  • friction theory
  • n-decane
  • viscosity
  • liquid density
  • n-docosane
  • corresponding states
  • n-tetracosane
  • Peng-Robinson EOS

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