Comptes Rendus
no. 4-5
Measurement of isothermal diffusion coefficients in ternary mixtures using counter flow diffusion cell
Aliaksandr Mialdun1  ; Viktar Yasnou1  ; Valentina Shevtsova1
1 Université libre de Bruxelles, Physical Chemistry Department, Microgravity Research Center, CP165/62, Av. Franklin-Delano-Roosevelt 50, B-1050 Brussels, Belgium
Comptes Rendus. Mécanique, Volume 341 (2013) no. 4-5, pp. 462-468.

A new diffusion cell and an interferometer have been developed for determination of isothermal diffusion coefficients in ternary mixtures. Two interferometer schemes have been proposed and tested for the measurements. The classical Mach–Zehnder interferometer can be reconfigured into a common-path interferometer to resolve high gradients of the refractive index that are typical of diffusion experiments. Formulations, methodology and algorithms for data extraction are presented for the example of a ternary mixture with an equal mass fraction of all components (1:1:1) in the system of tetralin–isobutylbenzene–dodecane. The selection of the fitting procedure is very important for obtaining reliable results.

Publié le :
DOI : 10.1016/j.crme.2013.02.001
Mots clés : Diffusion, Ternary mixture, Injection, Mach–Zehnder interferometer, Common-path interferometer, Fitting
Aliaksandr Mialdun 1 ; Viktar Yasnou 1 ; Valentina Shevtsova 1

1 Université libre de Bruxelles, Physical Chemistry Department, Microgravity Research Center, CP165/62, Av. Franklin-Delano-Roosevelt 50, B-1050 Brussels, Belgium 
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Aliaksandr Mialdun; Viktar Yasnou; Valentina Shevtsova. Measurement of isothermal diffusion coefficients in ternary mixtures using counter flow diffusion cell. Comptes Rendus. Mécanique, Volume 341 (2013) no. 4-5, pp. 462-468. doi : 10.1016/j.crme.2013.02.001. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/j.crme.2013.02.001/

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