Infinite dilution activity coefficients and thermodynamic properties of selected organic solutes and water dissolved in 1, 6-hexanediol
| Autor: | Peterson Ngema, Suresh Ramsuroop, Kaniki Tumba, Nkululeko Nkosi |
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| Rok vydání: | 2022 |
| Předmět: |
Activity coefficient
Hydrogen bond Enthalpy Thermodynamics Atomic and Molecular Physics and Optics Dilution Gibbs free energy Partition coefficient Solvent chemistry.chemical_compound symbols.namesake chemistry 90403 Chemical Engineering Design Ionic liquid symbols General Materials Science Physical and Theoretical Chemistry FOS: Chemical engineering |
| DOI: | 10.48741/mut.18110492.v1 |
| Popis: | The experimental activity coefficients ( γ 13 ∞ ) and gas-to-liquid partition coefficients (KL) at infinite dilution for 34 organic solutes and water were determined in 1.6-hexanediol (HDO) by the gas–liquid chromatography technique (GLC) in the temperature range from (323.15 to 353.15) K. Fundamental thermodynamic functions such as excess partial molar enthalpy ( Δ H i E , ( ∞ ) ), excess partial molar Gibbs energy, ( Δ G i E , ∞ ) and entropy, ( T ref Δ S i E , ∞ ) at infinite dilution were calculated from experimental values of γ 13 ∞ . Reported data were discussed in terms of solvent-solute interactions, heat effects and mixing spontaneity. Selectivity ( S ij ∞ ) and capacity ( k j ∞ ) related to different separation problems were calculated from γ 13 ∞ data and compared to the literature values for selected ionic liquids (ILs), deep eutectic solvents (DESs) and industrial solvents. New data reported in this study suggest that HDO may be proposed as an alternative solvent for the separation of alkanes-pyridine and alkanes-thiophene systems. Furthermore, it was found that adding a hydrogen bond acceptor to HDO enhances its performance as a separation solvent. |
| Databáze: | OpenAIRE |
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