Eur. Phys. J. E (2015) 38: 26
https://doi.org/10.1140/epje/i2015-15026-3

Regular Article

Contribution to the benchmark for ternary mixtures: Measurement of diffusion and Soret coefficients of ternary system tetrahydronaphtalene-isobutylbenzene-n-dodecane with mass fractions 80-10-10 at 25 °C

Microgravity Research Center, Université libre de Bruxelles, Dept. Chemical Physics, Avenue F. D. Roosevelt, B-1050, Brussels, Belgium

^* e-mail: qgaland@ulb.ac.be

Received: 16 July 2014
Revised: 19 November 2014
Accepted: 3 February 2015
Published online: 27 April 2015

Abstract

This paper provides the molecular diffusion and Soret coefficients of the ternary system 1,2,3,4-tetrahydronaphtalene, isobutylbenzene, n -dodecane system at mass fractions 0.8-0.1-0.1 and temperature 25 ^°C for implementation into the benchmark presented in this topical issue. The Soret coefficients are determined by digital interferometry using the data of DSC-DCMIX microgravity experiment. The method used takes into account the influence of the thermal field on the Soret separations and the selection of the image processing techniques results in reproducible Soret coefficients.The diffusion coefficients are obtained by the Open Ended Capillary technique The fitting of the data collected through a set of two complementary experimental runs allows retrieving the four Fickian diffusion coefficients.