Phase equilibria and volumetric and viscosity behavior of the aqueous double salt ionic liquid [EMIM][SCN] [MeSO3](1-)

Vataščin, Erika; Havlová, Markéta; Dohnal, Vladimı́r

doi:10.1016/j.fluid.2021.113199

Cited by 4 publications

(3 citation statements)

References 38 publications

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“…When the apparatus is operated in the continuous mode, an operator continuously monitors the water activity and temperature readings, waiting for them to stabilize. Several studies proved that AQUALAB 4TE is a reliable apparatus for measuring water activity. − During the current research, AQUALAB’s worth was additionally validated.…”

Section: Methodsmentioning

confidence: 77%

“…The main result of the study is a thermodynamic model of the H 2 O–H 2 SO 4 –UO 2 SO 4 system based on Pitzer–Simonson–Clegg (PSC) equations, , which has been developed using both literature data on water activity and solid–liquid equilibria in the H 2 O–H 2 SO 4 –UO 2 SO 4 and H 2 O–UO 2 SO 4 systems, and novel experimental data on water activity in the ternary system mentioned. Activity of water in the H 2 O–H 2 SO 4 –UO 2 SO 4 solutions has been determined at 298.15, 310.65, and 323.15 K by means of an apparatus AQUALAB 4TE, − an increasingly popular dew-point hygrometer.…”

Section: Introductionmentioning

confidence: 99%

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Thermodynamic Model of the H₂O–H₂SO₄–UO₂SO₄ System Incorporating Novel Experimental Data on Water Activity

et al. 2023

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Activity of water in aqueous solutions containing sulfuric acid and uranyl sulfate has been determined at 298.15, 310.65, and 323.15 K by means of the apparatus AQUALAB 4TE. The data obtained, along with literature information about activity of water and solid–liquid equilibria in the H2O–UO2SO4 and H2O–H2SO4–UO2SO4 systems, were used to develop a thermodynamic model of the ternary system mentioned. The resulting model, employing Pitzer–Simonson–Clegg (PSC) equations to represent the properties of a liquid phase, is valid within a wide range of temperatures and concentrations. Apart from introducing novel experimental data and a thermodynamic model, the reported study discusses advantages and disadvantages of the PSC-based thermodynamic descriptions of the H2O–H2SO4 subsystem presented in the literature.

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Section: Methodsmentioning

confidence: 77%

Section: Introductionmentioning

confidence: 99%

Thermodynamic Model of the H₂O–H₂SO₄–UO₂SO₄ System Incorporating Novel Experimental Data on Water Activity

et al. 2023

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“…NRTL model has been widely proved to perform adequately for the purpose in our previous studies. [1][2][3][4][5][6]8 Bearing in mind that the selection of accurate data and rational fitting strategy are also important prerequisites for establishing a globally performing model, the procedure we adopted for the evaluation of adjustable parameters was as follows. For the (water + [BMPYR][OTF]) system, the VLE and H E data measured in this work were simultaneously correlated using the weighted least-squares method, the objective function minimalized being…”

Section: Phase Equilibria and Thermalmentioning

confidence: 99%

Phase Equilibria, Thermodynamic Behavior, and Transport Properties of Aqueous Solutions of [BMPYR] Trifluoromethanesulfonate and [BMPYR] Tricyanomethanide

Havlová

Dohnal

2022

J. Chem. Eng. Data

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In this work, continuing our systematic studies on mixtures of 1-ethyl-3-methylimidazolium- or 1-butyl-1-methylpyrrolidinium (BMPYR)-based ionic liquids (ILs) with water, we thoroughly examine the thermodynamic and transport behavior of binary aqueous systems of two BMPYR-based ILs containing trifluoromethanesulfonate (OTF) and tricyanomethanide (TCM) as counterions. We performed accurate measurements of the phase equilibria, mixing enthalpy, density, viscosity, and electrical conductivity for these mixtures. The condensed phase equilibria were determined by employing dynamic measurements of freezing or cloud point temperatures and static solubility measurements for the mixtures, as well as DSC measurements on the neat ILs. The mixing enthalpy of [BMPYR][OTF] with water was determined at high IL dilutions and four temperatures in the range T = (288.15–318.15) K. Measurements of other properties were performed over the entire composition range (apart from the narrow miscibility gap in the dilute [BMPYR][TCM] region). The vapor–liquid equilibrium was determined by measuring water activity at seven equidistant temperatures in the range T = (288.15–318.15) K. The activity data were simultaneously correlated with those on either excess enthalpy (for [BMPYR][OTF]) or mutual liquid–liquid solubilities (for [BMPYR][TCM]) using an extended nonrandom two-liquid equation. This thermodynamic description of the systems was shown to be of outstanding global performance and allowed us to gain a deeper insight into their energetics. Density, viscosity, and conductivity for the mixtures, as well as of neat ILs, were measured at 10 temperatures covering the range T = (288.15–333.15) K and were adequately represented by suitable empirical relations. A consistent molecular-level interpretation of various facets of the observed behavior is presented in terms of an interplay of anion–water and water–water H-bonding, cation hydrophobic hydration, and ion pairing. Due comparison of new data with those available in the literature enabled us to discriminate their quality and identify some of the latter as incorrect.

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New insights and updated correlations for density, viscosity, refractive index, and associated properties of aqueous 4-diethyl-amino-2-butanol solution

Sema

Gao²,

Liang³

et al. 2022

Fluid Phase Equilibria

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Phase equilibria and volumetric and viscosity behavior of the aqueous double salt ionic liquid [EMIM][SCN] [MeSO3](1-)

Cited by 4 publications

References 38 publications

Thermodynamic Model of the H₂O–H₂SO₄–UO₂SO₄ System Incorporating Novel Experimental Data on Water Activity

Thermodynamic Model of the H₂O–H₂SO₄–UO₂SO₄ System Incorporating Novel Experimental Data on Water Activity

Phase Equilibria, Thermodynamic Behavior, and Transport Properties of Aqueous Solutions of [BMPYR] Trifluoromethanesulfonate and [BMPYR] Tricyanomethanide

New insights and updated correlations for density, viscosity, refractive index, and associated properties of aqueous 4-diethyl-amino-2-butanol solution

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Phase equilibria and volumetric and viscosity behavior of the aqueous double salt ionic liquid [EMIM][SCN] [MeSO3](1-)

Cited by 4 publications

References 38 publications

Thermodynamic Model of the H2O–H2SO4–UO2SO4 System Incorporating Novel Experimental Data on Water Activity

Thermodynamic Model of the H2O–H2SO4–UO2SO4 System Incorporating Novel Experimental Data on Water Activity

Phase Equilibria, Thermodynamic Behavior, and Transport Properties of Aqueous Solutions of [BMPYR] Trifluoromethanesulfonate and [BMPYR] Tricyanomethanide

New insights and updated correlations for density, viscosity, refractive index, and associated properties of aqueous 4-diethyl-amino-2-butanol solution

Contact Info

Product

Resources

About

Thermodynamic Model of the H₂O–H₂SO₄–UO₂SO₄ System Incorporating Novel Experimental Data on Water Activity

Thermodynamic Model of the H₂O–H₂SO₄–UO₂SO₄ System Incorporating Novel Experimental Data on Water Activity