Isobaric Vapor–Liquid Equilibrium for Binary Systems of Toluene + Ethanol and Toluene + Isopropanol at (101.3, 121.3, 161.3, and 201.3) kPa

Chen, Ruiqian; Zhong, Lei; Xu, Chunjian

doi:10.1021/je200921u

Cited by 25 publications

(17 citation statements)

References 25 publications

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“…The values of the local optima solutions found were recorded and sorted by their quality (decreasing value of * ). Table 9 summarizes the best set of values that were found for the NRTL parameters of the systems under study x calc,i − x exp,i (10) for each water-IL and ethanol-IL binary systems and pressure datasets. In the T-x binary diagrams for the different ionic liquids in Figs.…”

Section: Resultsmentioning

confidence: 99%

“…an approximate total volume of the still of 120 cm 3 , requiring about 80 cm 3 of sample; Chen et al [10] used recirculation VLE still with internal volume of about 120 cm 3 of which the liquid occupied about 100 cm 3 . The VLE cell used by most researchers on this field such as Alvarez et al [7], Andreatta et al [11,12] and Calvar et al [5,13,14] is a glass Fischer Labodest equilibrium still that requires a sample volume of circa 35 cm 3 .…”

Section: Introductionmentioning

confidence: 99%

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A new microebulliometer for the measurement of the vapor–liquid equilibrium of ionic liquid systems

Carvalho

Khan

Morais

et al. 2013

Fluid Phase Equilibria

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Over the last decade ionic liquids appeared as potential entrainers for extractive distillation processes. However experimental vapor-liquid equilibrium data for ionic liquid containing systems is still scarce since most conventional equilibrium cells are not adequate for these systems. To overcome that limitation a new isobaric microebulliometer, operating at pressures ranging from 0.05 to 0.1 MPa and requiring a sample volume lower than 8 mL was developed and validated in this work. The new apparatus was used to determine isobaric VLE data at pressures of 0.05, 0.07 and 0.1 MPa for eight binary mixtures of 1-ethyl-3-methylimidazolium chloride ([C 2 mim][Cl]), 1-butyl-3methylimidazolium chloride ([C 4 mim][Cl]), 1-hexyl-3-methylimidazolium chloride ([C 6 mim][Cl]), and choline chloride ([N 111(2OH) ][Cl]) with water and ethanol. The experimental data here measured were correlated with the NRTL model.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A new microebulliometer for the measurement of the vapor–liquid equilibrium of ionic liquid systems

Carvalho

Khan

Morais

et al. 2013

Fluid Phase Equilibria

View full text Add to dashboard Cite

show abstract

“…For aqueous systems with a non volatile liquid compound the measurement of vapour liquid equilibrium is the most used, but in aqueous systems containing ionic liquids it is expensive and time consuming. Not only the available equipments, developed for conventional solvents, require a large sample volume ranging from the 250 cm 3 of Wang et al [36] down to the recently reported used of a glass Fischer Labodest equilibrium still that requires a sample volume of circa 35 cm 3 [37][38][39][40][41][42][43]. Moreover the high viscosity of the mixtures rich in ionic liquid difficult a regular boiling of the mixture, what causes long equilibration times, easily reaching 6 h. To overcome these limitations we have recently reported a microebulliometer of just 8 cm 3 of capacity to study these systems [44].…”

Section: Introductionmentioning

confidence: 99%

Assessing the activity coefficients of water in cholinium-based ionic liquids: Experimental measurements and COSMO-RS modeling

Khan

Kurnia

Sintra

et al. 2014

Fluid Phase Equilibria

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a b s t r a c tThe vapor liquid-equilibrium of water + ionic liquids is relevant for a wide range of applications of these compounds. It is usually measured by ebulliometric techniques, but these are time consuming and expensive. In this work it is shown that the activity coefficients of water in a series of cholinium-based ionic liquids can be reliably and quickly estimated at 298.15 K using a humidity meter instrument. The cholinium based ionic liquids were chosen to test this experimental methodology since data for water activities of quaternary ammonium salts are available in the literature allowing the validation of the proposed technique.The COSMO-RS method provides a reliable description of the data and was also used to understand the molecular interactions occurring on these binary systems. The estimated excess enthalpies indicate that hydrogen bonding between water and ionic liquid anion is the dominant interaction that governs the behavior of water and cholinium-based ionic liquids systems, while the electrostatic-misfit and van der Walls forces have a minor contribution to the total excess enthalpies.The results here reported show that water activity measurements allow a quick scan for selecting ionic liquids according to their behavior in mixtures with water.

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“…This obvious similarity strongly suggests that the polar solvent (isopropyl alcohol) needed to induce dissolution of the SBI evaporates early during the drying process, thereby allowing the nanostructure to be templated by the remaining nonpolar solvent (toluene). (We note here that the TIPA mixed solvent is reported to exhibit complex liquid‐vapor equilibria, including the existence of an azeotrope.) A contrast‐reversed series of 2‐D slices extracted from a 3‐D TEMT reconstruction of this morphology at depths of 10, 20, and 30 nm is presented in Figure and, along with previously reported 3‐D TEMT images, confirms that the ion‐rich microdomains are largely discontinuous, which is not a favorable spatial arrangement by which to promote ion diffusion.…”

Section: Resultsmentioning

confidence: 80%

Tuning the performance of aqueous photovoltaic elastomer gels by solvent polarity and nanostructure development

Al-Mohsin

Mineart

Armstrong

et al. 2016

J. Polym. Sci. Part B: Polym. Phys.

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In this study, a sulfonated pentablock ionomer is considered for use as an aqueous gel electrolyte in photovoltaic elastomer gels (PVEGs) containing photosensitive dyes. Depending on the casting solvent employed, these materials order into different nanoscale morphologies, some of which inherently consist of a continuous pathway through which ions and other polar species are able to diffuse, while others transform into continuous channels upon exposure to water. Here, we examine the effect of solvent polarity during film casting, vapor annealing, and liquid immersion on block ionomer morphology and PVEG photovoltaic performance. Casting the block ionomers from a mixed nonpolar/polar solvent promotes the formation of dispersed ion-rich spherical microdomains. Alternatively, the use of a single polar solvent produces coexisting nonpolar cylinders and lamellae. Exposure of either morphology to polar solvent vapor causes the block ionomers to restructure into a lamellar morphology, whereas exposure of dispersed ion-rich microdomains to water induces a transformation to an irregular morphology composed of continuous ionic channels, which provide an effective pathway for ion diffusion and, consequently, the highest photovoltaic efficiency. In addition to their photovoltaic efficacy, these aqueous gels possess improved mechanical properties (in terms of tensile strength and elastic modulus) in the presence of photosensitive dyes. V C 2016 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2017, 55, 85-95

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Isobaric Vapor–Liquid Equilibrium for Binary Systems of Toluene + Ethanol and Toluene + Isopropanol at (101.3, 121.3, 161.3, and 201.3) kPa

Cited by 25 publications

References 25 publications

A new microebulliometer for the measurement of the vapor–liquid equilibrium of ionic liquid systems

A new microebulliometer for the measurement of the vapor–liquid equilibrium of ionic liquid systems

Assessing the activity coefficients of water in cholinium-based ionic liquids: Experimental measurements and COSMO-RS modeling

Tuning the performance of aqueous photovoltaic elastomer gels by solvent polarity and nanostructure development

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