https://doi.org/10.1140/epjp/s13360-022-03254-w
Regular Article
Determination of the effective diffusion coefficient of ternary mixtures in the thermogravitational micro-column using optical digital interferometry
1
Mechanical and Industrial Manufacturing Department, Mondragon Unibertsitatea, Arrasate, Spain
2
Physical and Inorganic Chemistry Department, Universitat Rovira i Virgili, Tarragona, Spain
Received:
12
November
2021
Accepted:
1
September
2022
Published online:
17
September
2022
Optical digital interferometric unsteady-state analysis is novelly attempted on the thermogravitational micro-column for the determination of the effective diffusion coefficient on ternary mixtures. We tested the ideal model from the Furry–Jones–Onsager theory over the well-studied ternary benchmark mixture composed by tetrahydronaphthalene, isobutylbenzene and n-dodecane. We performed thermodiffusion experiments at a mass fraction of 0.80–0.10–0.10 for THN-IBB-nC12 at 25 °C and calculated the effective diffusion coefficient by transient analysis. The obtained results show good agreement with the literature, which validates the thermogravitational technique for the effective diffusion coefficient determination of ternary mixtures.
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