Results of the DCMIX1 experiment on measurement of Soret coefficients in ternary mixtures of hydrocarbons under microgravity conditions on the ISS

Quentin Galand; Stéfan Van Vaerenbergh; Werner Köhler; Oleg Khlybov; Tatyana Lyubimova; Aliaksandr Mialdun; Ilya Ryzhkov; Valentina Shevtsova; Thomas Triller

doi:10.1063/1.5100595

Results of the DCMIX1 experiment on measurement of Soret coefficients in ternary mixtures of hydrocarbons under microgravity conditions on the ISS

J Chem Phys. 2019 Oct 7;151(13):134502. doi: 10.1063/1.5100595.

Authors

Quentin Galand¹, Stéfan Van Vaerenbergh¹, Werner Köhler², Oleg Khlybov³, Tatyana Lyubimova³, Aliaksandr Mialdun¹, Ilya Ryzhkov⁴, Valentina Shevtsova¹, Thomas Triller²

Affiliations

¹ MRC, Université libre de Bruxelles, Department of Chemical Physics, Avenue F. D. Roosevelt, CP165/32, B-1050 Brussels, Belgium.
² Physikalisches Institut, Universität Bayreuth, 95440 Bayreuth, Germany.
³ Institute of Continuous Media Mechanics UB RAS, Koroleva, 1, 614013 Perm, Russia.
⁴ Institute of Computational Modelling SB RAS, 660036 Krasnoyarsk, Russia.

PMID: 31594322
DOI: 10.1063/1.5100595

Abstract

The Soret coefficients of a set of ternary systems of 1,2,3,4-tetrahydronaphthalene (THN), isobutylbenzene (IBB), and n-dodecane (nC₁₂) at 298.15 K were measured under microgravity condition aboard the International Space Station in the frame of the DCMIX1 experiment. The present work includes a comprehensive study of possible data processing sequences for the interpretation of interferometric Soret experiments in ternary systems. Several data processing methodologies are discussed. A significant concentration dependence of the Soret coefficients is observed. In the present study, we have obtained large and positive values for THN and negative ones for IBB in all investigated systems. A linear relation between the Soret coefficients of two components is derived for each system and allows validating experimentally the coefficients measured in other experiments.