Soret vector for description of multicomponent mixtures

Abstract The Soret effect describes the transport of constituent species in multicomponent mixtures that occurs due to a temperature gradient. This cross-coupling effect of heat and mass transfer has been successfully examined in binary liquid mixtures, while experiments with ternary mixtures are ra...

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Autores principales:	Aliaksandr Mialdun, Mounir Bou-Ali, Valentina Shevtsova
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/4751358c97d54f94bc10456ddaf55a87
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spelling	oai:doaj.org-article:4751358c97d54f94bc10456ddaf55a872021-12-02T17:19:16ZSoret vector for description of multicomponent mixtures10.1038/s41598-021-97125-62045-2322https://doaj.org/article/4751358c97d54f94bc10456ddaf55a872021-09-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-97125-6https://doaj.org/toc/2045-2322Abstract The Soret effect describes the transport of constituent species in multicomponent mixtures that occurs due to a temperature gradient. This cross-coupling effect of heat and mass transfer has been successfully examined in binary liquid mixtures, while experiments with ternary mixtures are rare as they impose significant difficulties. We introduce a new and innovative concept, the Soret vector, for the characterization of Soret driven separation in ternary mixtures. The presentation of the component separation in the vector form offers several advantages: (i) to predict the Soret sign of a ternary mixture from knowledge of the Soret coefficients in binary subsystems; (ii) to control consistency of measured coefficients, this is especially important when results are obtained using different instruments and methods; (iii) to determine in which regions and which components cause the greatest separation; (iv) to identify the regions where the Soret separation is inaccessible for optical techniques or gravitationally unstable. We demonstrate these features by exploring ternary mixtures of different origins: (a) nearly ideal mixture composed by THN–IBB–nC12 when Soret coefficients in binary subsystems ( $$S_{T}^{bin}$$ S T bin ) are positive, (b) non-ideal mixture containing water and ethanol TEG–Wat–EtOH when $$S_{T}^{bin}$$ S T bin are positive and negative and (c) Tol–MeOH–Ch mixture containing demixing zone with positive and negative $$S_{T}^{bin}$$ S T bin . Our approach provides a promising systematic framework for the future research of an important and challenging problem of thermodiffusion in multicomponent liquids.Aliaksandr MialdunMounir Bou-AliValentina ShevtsovaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-13 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Aliaksandr Mialdun Mounir Bou-Ali Valentina Shevtsova Soret vector for description of multicomponent mixtures
description	Abstract The Soret effect describes the transport of constituent species in multicomponent mixtures that occurs due to a temperature gradient. This cross-coupling effect of heat and mass transfer has been successfully examined in binary liquid mixtures, while experiments with ternary mixtures are rare as they impose significant difficulties. We introduce a new and innovative concept, the Soret vector, for the characterization of Soret driven separation in ternary mixtures. The presentation of the component separation in the vector form offers several advantages: (i) to predict the Soret sign of a ternary mixture from knowledge of the Soret coefficients in binary subsystems; (ii) to control consistency of measured coefficients, this is especially important when results are obtained using different instruments and methods; (iii) to determine in which regions and which components cause the greatest separation; (iv) to identify the regions where the Soret separation is inaccessible for optical techniques or gravitationally unstable. We demonstrate these features by exploring ternary mixtures of different origins: (a) nearly ideal mixture composed by THN–IBB–nC12 when Soret coefficients in binary subsystems ( $$S_{T}^{bin}$$ S T bin ) are positive, (b) non-ideal mixture containing water and ethanol TEG–Wat–EtOH when $$S_{T}^{bin}$$ S T bin are positive and negative and (c) Tol–MeOH–Ch mixture containing demixing zone with positive and negative $$S_{T}^{bin}$$ S T bin . Our approach provides a promising systematic framework for the future research of an important and challenging problem of thermodiffusion in multicomponent liquids.
format	article
author	Aliaksandr Mialdun Mounir Bou-Ali Valentina Shevtsova
author_facet	Aliaksandr Mialdun Mounir Bou-Ali Valentina Shevtsova
author_sort	Aliaksandr Mialdun
title	Soret vector for description of multicomponent mixtures
title_short	Soret vector for description of multicomponent mixtures
title_full	Soret vector for description of multicomponent mixtures
title_fullStr	Soret vector for description of multicomponent mixtures
title_full_unstemmed	Soret vector for description of multicomponent mixtures
title_sort	soret vector for description of multicomponent mixtures
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/4751358c97d54f94bc10456ddaf55a87
work_keys_str_mv	AT aliaksandrmialdun soretvectorfordescriptionofmulticomponentmixtures AT mounirbouali soretvectorfordescriptionofmulticomponentmixtures AT valentinashevtsova soretvectorfordescriptionofmulticomponentmixtures
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Soret vector for description of multicomponent mixtures

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