/ J. C. Legros [et al.]> // Phys. Chem. Chem. Phys. - 2015. -
Vol. 17,
Is. 41. - P27713-27725,
DOI 10.1039/c5cp04745e
. - ISSN 1463-9076
Аннотация: We present a comprehensive experimental study of isothermal Fickian diffusion in the ternary and binary liquid
mixtures of water, ethanol, and triethylene glycol over the entire ternary composition space. 21 ternary
mixtures inside the composition triangle have been investigated by means of the Taylor dispersion technique and 30 binary
mixtures by Taylor dispersion and/or optical beam deflection in a Soret cell. The scalar binary diffusion coefficient has been determined along all three binary boundaries of the composition space and compared with estimations based on the Stokes-Einstein relation using stick or slip boundary conditions. The four elements of the ternary diffusion matrix and the diffusion eigenvalues were determined over a large portion of the composition triangle. The pseudo-binary diffusion coefficients obtained in Taylor dispersion experiments with either one of the two independent concentrations kept constant are comparable to the two diffusion eigenvalues. One of the two off-diagonal elements of the diffusion matrix is of the same order as the diagonal ones and, hence, not negligible, whereas the other one is approximately one order of magnitude smaller. Where available, our results compare well with literature data. The investigated compositions also comprise the five compositions that are scheduled for microgravity experiments in the ESA DCMIX3 project. This journal is © the Owner Societies 2015.
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WOS Держатели документа: Microgravity Research Center, Universite Libre de Bruxelles (ULB), CP-165/62 Av. F.D. Roosevelt 50, B-1050 Brussels, Belgium
Institute of Computational Modelling SB RAS, Krasnoyarsk, Russian Federation
Physikalisches Institut, Universitat Bayreuth, Bayreuth, Germany
National Research Tomsk Polytechnic University, Russian Federation
Доп.точки доступа: Legros, J. C.; Gaponenko, Y.; Гапоненко, Юрий Анатольевич; Mialdun, A.; Triller, T.; Hammon, A.; Bauer, C.; Kohler, W.; Shevtsova, V.