Thermogravitational Column as a Technique for Thermal Diffusion Factor Measurement in Liquid Mixtures

Abstract

Abstract Thermogravirational thermal diffusion separations are studied for benzene-n-heptane, benzene-n-hexane, toluene-n-heptane, toluene-n-hexane, carbon tetra-chloride-n-hexane, and cyclohexane-n-hexane mixtures at a mean temperature of 37.5°C. The column used was of 90 cm length with a 0.095 cm gap. Despite its length, this column can be used as a standard for the value of αT extraction when the separation factor is extrapolated to ΔT = 0°C. Thermal diffusion factors are calculated for benzene-n-heptane and benzene-n-hexane mixtures in different concentrations. For the rest of the systems investigated, αTD12 values (D12 being the ordinary diffusion coefficient) are calculated.