Leahy-Dios Alana, Firoozabadi Abbas
Department of Chemical Engineering, Mason Lab, Yale University, New Haven, Connecticut 06520-8286, USA.
J Phys Chem B. 2007 Jan 11;111(1):191-8. doi: 10.1021/jp064719q.
New molecular and thermal diffusion coefficients of binary mixtures of normal decane-normal alkanes and methylnaphthalene-normal alkanes are measured at atmospheric pressure and T = 25 degrees C. The normal alkanes used in this work include nC5-nC20. Thermal diffusion coefficients were measured in a thermogravitational column. Molecular diffusion coefficients were measured using an open-ended capillary tube technique. Results show a significant effect of molecular shape and size on thermal and molecular diffusion coefficients. Molecular diffusion coefficients show a monotonic behavior in both aromatic-normal alkane and normal decane-normal alkane mixtures. Thermal diffusion coefficients reveal a nonmonotonic trend with molecular size in the normal decane-normal alkane mixtures. This is the first report of the nonmonotonic behavior in the literature. The data presented in this paper provide an accurate self-molecular diffusion coefficient for nC10 from binary data.
在大气压和T = 25摄氏度下，测量了正癸烷-正构烷烃以及甲基萘-正构烷烃二元混合物的新分子扩散系数和热扩散系数。本研究中使用的正构烷烃包括nC5 - nC20。热扩散系数在热重力柱中测量。分子扩散系数采用开口毛细管技术测量。结果表明，分子形状和大小对热扩散系数和分子扩散系数有显著影响。在芳烃-正构烷烃和正癸烷-正构烷烃混合物中，分子扩散系数均呈现单调变化。在正癸烷-正构烷烃混合物中，热扩散系数随分子大小呈现非单调趋势。这是文献中首次报道这种非单调行为。本文给出的数据从二元数据中提供了准确的nC10自分子扩散系数。
