Soret coefficient of the n-dodecane-n-hexane binary mixture under high pressure

  • Ion Lizarraga
  • Fabrizio Croccolo
  • Henri Bataller
  • M. Mounir Bou-Ali
Regular Article

DOI: 10.1140/epje/i2017-11520-x

Cite this article as:
Lizarraga, I., Croccolo, F., Bataller, H. et al. Eur. Phys. J. E (2017) 40: 36. doi:10.1140/epje/i2017-11520-x
Part of the following topical collections:
  1. Non-isothermal transport in complex fluids

Abstract.

In the present work, the Soret coefficient has been determined at high pressure for a binary hydrocarbon mixture by combining the thermogravitational column and the dynamic near-field imaging techniques. The analyzed mixture is an iso-massic n -dodecane-n -hexane mixture at 298.15K. The molecular diffusion coefficient has been measured up to 20MPa by means of the dynamic analysis of the light scattered by non-equilibrium concentration fluctuations. With a cylindrical thermogravitational column the thermodiffusion coefficient was determined from 0.1MPa to 10MPa. Density, as well as, mass expansion and thermal expansion have been measured with a high pressure densimeter. Dynamic viscosity at up to 20MPa has been determined with a high pressure viscometer. This work shows the decreasing tendency of both the molecular diffusion and the thermodiffusion coefficient with increasing pressure.

Graphical abstract

Keywords

Topical Issue: Non-isothermal transport in complex fluids 

Copyright information

© EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2017

Authors and Affiliations

  • Ion Lizarraga
    • 1
  • Fabrizio Croccolo
    • 2
    • 3
  • Henri Bataller
    • 2
  • M. Mounir Bou-Ali
    • 1
  1. 1.MGEP Mondragon Goi Eskola Politeknikoa, Mechanical and Industrial Manufacturing DepartmentMondragonSpain
  2. 2.Univ. Pau & Pays Adour, CNRS, TOTAL, LFCR-IPRA, UMR5150AngletFrance
  3. 3.CNES Centre National d’Études SpatialesParis Cedex 01France

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