Effect of CaCl2 and ZnCl2 salts on isobaric vapor-liquid equilibrium in separation of the azeotropic mixture of ethanol + water

Ghuge, Pravin D.; Mali, Nilesh A.; Joshi, Sunil S.

doi:10.1016/j.fluid.2021.113000

Cited by 5 publications

(2 citation statements)

References 33 publications

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“…Overview of available experimental and predicted α ij (at 101.3 ± 2 kPa) for ethanol/water and 2-propanol/water mixtures in the presence of imidazolium chloride IL and calcium chloride. Open circles (○) and crosses (×) represent the experimental data available for CaCl 2 − and [C 4 mim]Cl, − respectively, and the dotted lines depict the COSMO-RS predictions using the TZVP parameterization.…”

Section: Resultsmentioning

confidence: 99%

“…The equimolar mixture of [C 4 mim]Cl and [C 12 mim]Cl (Q ij ∞ = 5.17) also delivers a reasonable performance for the separation of cyclohexane from benzene, being superior to values found for NFM (Q ij ∞ = 4.45; 46 Q ij ∞ = 3.75 47 ) and sulfolane (Q ij ∞ = 0.72). In both cases, [C 12 mim]Cl is the least promising option 68) among the studied ILs. The phosphonium-based [P 6,6,6,14 ]Cl presents the highest capacity for benzene (k j ∞ = 2.02), 26 as a consequence of its stronger affinity with this aromatic organic solute.…”

Section: Activitymentioning

confidence: 96%

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Imidazolium Chloride Ionic Liquid Mixtures as Separating Agents: Fuel Processing and Azeotrope Breaking

et al. 2022

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Relevant chemical separations for the petrochemical and chemical industries include the removal of aromatic hydrocarbons from aliphatics, the desulfurization and denitrification of fuels, and the separation of azeotropic mixtures containing alkanols. In an attempt to contribute to the development of novel technologies, the potentialities of imidazolium chloride ionic liquid (IL) mixtures as separation agents were investigated. Selectivities, capacities, and solvent performance indices were calculated through the activity coefficients at infinite dilution of organic solutes and water in the imidazolium chloride IL: [C8mim]Cl, [C12mim]Cl, and the equimolar mixture of [C4mim]Cl and [C12mim]Cl. Results show that the imidazolium chloride IL might be appropriately tailored for specific purposes, in which an increase in the proportion of cations containing larger alkyl chains tends to increase the overall affinity with organic solutes. The IL designer solvent concept was explored by comparing the IL equimolar mixture results with the intermediary [C8mim]Cl. The COSMO-RS thermodynamic model was also applied, showing it to be a promising tool for a fast qualitative screening of potential separation agents for specific separation processes.

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