Separation of binary mixtures based on limiting activity coefficients data using specific ammonium-based ionic liquid and modelling of thermodynamic functions

Urszula Domańska-Żelazna , Anna Wiśniewska , Zbigniew Dąbrowski , Monika Karpińska

Abstract

Thermodynamic properties of quaternary ionic liquid (IL), N-benzyl-N-dimethyl-N-tetradecylammonium cinnamate, [NBz,1,1,14][Cyn] were investigated by the inverse chromatography with 65 different solvents: alkanes (C5-C10), cycloalkanes (C5-C8), alkenes (C5-C10), alkynes (C5-C8), aromatic hydrocarbons (benzene, toluene, ethylbenzene, o-, m-, p-xylene, thiophene), alcohols (C1-C5), water, ethers (diethyl-, di-n-propyl-, di-n-butylether, methyl-tert-butylether, MTBE, tetrahydrofuran, THF) and ketones (propanone, 2-pentanone, 3-pentanone, 2-hexanone, 3-hexanone, cyclopentanone) at five temperatures ranging from (328.15–368.15) K. The limiting activity coefficients, the thermodynamic functions, the limiting partial molar excess Gibbs energy, enthalpy and entropy were calculated. The values of selectivity and capacity for water/butan-1-ol, water/ethanol, water/THF, water/1,4-dioxane and many others separation problems were calculated from and compared to literature values for selected ionic liquids. On the basis of the results, the intermolecular interactions of the chosen IL and solutes were discussed. The data presented here shows that [NBz,1,1,14][Cyn] reveals very large selectivity for the hexane/ethanol and heptane/ethanol separation. It allows expanding our knowledge about nature of the [NBz,1,1,14][Cyn], influence of polar functional groups and the structure on thermodynamical properties of [NBz,1,1,14][Cyn] and designing suitable solvent for specific extraction problem. It was shown earlier in many data that the selectivities of ammonium-based ILs in separating organic liquids are often higher than those for commonly used solvents. However, the examination has to be always done of the selectivity together with capacity for a variety of solute in entrainers to provide a picture of interactions and costs.
Author Urszula Domańska-Żelazna (FC / DPC) - [Thermodynamic Research Unit, School of Chemical Engineering, Instytut Chemii Przemysłowej im. prof. Ignacego Mościckiego]
Urszula Domańska-Żelazna,,
- Department Of Physical Chemistry
- Thermodynamic Research Unit, School of Chemical Engineering
- Instytut Chemii Przemysłowej im. prof. Ignacego Mościckiego
, Anna Wiśniewska
Anna Wiśniewska,,
-
, Zbigniew Dąbrowski
Zbigniew Dąbrowski,,
-
, Monika Karpińska (FC / DPC)
Monika Karpińska,,
- Department Of Physical Chemistry
Journal seriesFluid Phase Equilibria, ISSN 0378-3812, (A 30 pkt)
Issue year2018
Vol460
Pages155-161
Publication size in sheets0.5
Keywords in EnglishIonic liquid [NBz,1,1,14][Cyn]Experimental limiting activity coefficientsThermodynamicsSeparation
ASJC Classification1606 Physical and Theoretical Chemistry; 3100 General Physics and Astronomy; 1500 General Chemical Engineering
DOIDOI:10.1016/j.fluid.2017.12.029
URL https://www.sciencedirect.com/science/article/pii/S0378381217305137
Languageen angielski
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1-s2.0-S0378381217305137-main.pdf 345 KB
Score (nominal)30
ScoreMinisterial score = 30.0, 24-07-2018, ArticleFromJournal
Ministerial score (2013-2016) = 30.0, 24-07-2018, ArticleFromJournal
Publication indicators Scopus SNIP (Source Normalised Impact per Paper): 2017 = 1.033; WoS Impact Factor: 2017 = 2.197 (2) - 2017=2.214 (5)
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