Results on the measurement of the soret coefficients for ternary hydrocarbons mixtures on board ISS

摘要

The diffusion and thermodiffusion coefficients of binary hydrocarbon mixtures have been measured and analyzed in detail elsewhere, as one step forward here we measured the separation of tetrahydronaphthalene, isobutylbenzene, and dodecane mixture in a ternary hydrocarbon mixture, at five different compositions due to thermal gradients, and we determined the Soret and diffusion coefficients of this mixture. The thermodiffusion experiment was conducted by means of a Mach-Zehnder Interferometer (MZI) using two wavelengths and in a low gravity environment on board the International Space Station (ISS). Thus, we report the chemical concentration variations of the various cases obtained by the recently developed processing technique. Eventually, based on the transient behavior of the separation of the components, the Soret coefficient of all three components for various compositions of this mixture were measured.