Mass effect on the Soret coefficient in n-alkane mixtures

被引：22

作者：

Alonso de Mezquia, David ^{[1
]}

Mounir Bou-Ali, M. ^{[1
]}

Antonio Madariaga, J. ^{[2
]}

Santamaria, Carlos ^{[2
]}

机构：

[1] Engn Fac Mondragon Unibertsitatea, Mech & Mfg Dept, Arrasate Mondragon 20500, Spain

[2] Univ Basque Country UPV EHU, Dept Appl Phys 2, Bilbao 48080, Spain

来源：

JOURNAL OF CHEMICAL PHYSICS | 2014年 / 140卷 / 08期

关键词：

MOLECULAR-DIFFUSION; THERMAL-DIFFUSION; THERMODIFFUSION;

D O I：

10.1063/1.4865936

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We have determined the Soret coefficient of different equimolar and non equimolar n-alkane mixtures from measurements of the molecular diffusion and thermal diffusion coefficients. It is shown that equimolar mixtures behave as isotopic-like mixtures in which only the mass effect contributes to the Soret effect. In non equimolar mixtures, a small linear dependence with the molar fraction is observed. Finally, we have obtained a new correlation, which allows the determination of the Soret coefficient of n-alkane mixtures using the data of viscosity, the thermal expansion coefficient of the pure components, and the density of the equimolar mixture. (C) 2014 AIP Publishing LLC.

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