Thermal Diffusion in Binary Liquid Hydrocarbon Mixtures

Thermal diffusion coefficients have been measured for a series of binary mixtures of paraffin hydrocarbons and of paraffin hydrocarbons with benzene. The temperature dependence of the thermal diffusion coefficient is shown to be small. The results are correlated quite satisfactorily by assuming that the mobility of a molecule is inversely proportional to the product of the molecular mass and molecular cross section in the direction of flow.