Janzen Tatjana, Gaponenko Yuri, Mialdun Aliaksandr, Guevara-Carrion Gabriela, Vrabec Jadran, Shevtsova Valentina
Thermodynamics and Energy Technology, University of Paderborn Warburger Str. 100 D-33098 Paderborn Germany
Microgravity Research Center, Université Libre de Bruxelles CP-165/62, Av. F.D. Roosevelt, 50 B-1050 Brussels Belgium
RSC Adv. 2018 Mar 12;8(18):10017-10022. doi: 10.1039/c8ra01007b. eCollection 2018 Mar 5.
With laboratory and numerical work, we demonstrate that one of the main diffusion coefficients and the smaller eigenvalue of the Fick diffusion matrix are invariant to the number of methylene groups of the alcohol in ternary mixtures composed of an aromatic (benzene), a ketone (acetone) and one of three different alcohols (methanol, ethanol or 2-propanol). A critical analysis of the relationship between the kinetic and thermodynamic contributions to the diffusion coefficients allows us to explain this intriguing behaviour of this class of mixture. These findings are reflected by the diffusive behaviour of the according binary subsystems. Our approach provides a promising systematic framework for future investigations into the important and challenging problem of transport diffusion in multicomponent liquids.
通过实验室和数值研究，我们证明，在由一种芳烃（苯）、一种酮（丙酮）和三种不同醇类（甲醇、乙醇或2-丙醇）之一组成的三元混合物中，菲克扩散矩阵的一个主要扩散系数和较小特征值对于醇类亚甲基的数量是不变的。对扩散系数的动力学和热力学贡献之间关系的批判性分析，使我们能够解释这类混合物的这种有趣行为。这些发现反映在相应二元子系统的扩散行为中。我们的方法为未来研究多组分液体中重要且具有挑战性的输运扩散问题提供了一个有前景的系统框架。
