Isobaric vapor–liquid equilibria for ethanol–water system containing different ionic liquids at atmospheric pressure

Zhao, Jing; Dong, Congcong; Li, Chunxi; Meng, Hong; Wang, Zi-Hao

doi:10.1016/j.fluid.2006.01.023

Cited by 117 publications

(80 citation statements)

References 22 publications

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“…The experimental results of binary systems indicated that the ILs studied can lower the vapor pressure of the solvent due to the affinity between the IL and solvent, while the depreciation depended on the type and content of IL involved. It was shown that the effect of ILs on the vapor pressure lowering followed the order, i.e., with a decrease of alkyl chain length, the hydrophilicity of ILs increases [12,13]. In a previous study, the saturated vapor pressures of [Mmim]Cl aqueous solution have been investigated [14].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of 1,3-Dimethylimidazolium Chloride and Volumetric Property Investigations of Its Aqueous Solution

Zheng

et al. 2009

Int J Thermophys

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By investigating the vapor pressure of the solvent and the affinity between ionic liquids (ILs) and the solvent, it is proposed that 1,3-dimethylimidazolium chloride ([Mmim]Cl) has the potential to be used as a novel absorbent species with the absorption cycle working fluid. Adopting a high-pressure reaction kettle, the method of gas-liquid phase reaction was used to synthesize [Mmim]Cl under the conditions of 348.15 K and 0.7 MPa. The densities of [Mmim]Cl aqueous solutions were measured for mass fractions in the range from 20 % to 90 % at 293.15 K, 298.15 K, 303.15 K, 308.15 K, 313.15 K, and 318.15 K with a digital vibrating-tube densimeter. The excess volume, the apparent molar volume, the partial molar volume, and the apparent molar expansibility of this system were investigated, and the influences of variations of the cation and anion on the density of several IL aqueous solutions are discussed.

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Section: Introductionmentioning

confidence: 99%

Synthesis of 1,3-Dimethylimidazolium Chloride and Volumetric Property Investigations of Its Aqueous Solution

Zheng

et al. 2009

Int J Thermophys

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“…When an IL is used as a solvent or salt in a salt/extractive distillation process, it might be superior to the commonly used entrainers due to its nonvolatility, less causticity and good performance in improving the separation efficiency. Despite the potential advantages of ILs, only limited thermodynamic data on IL-containing systems have been reported, for example, liquid-liquid equilibrium [2,3], vapor-liquid equilibrium [4][5][6], infinite dilution activity coefficients of some organic solvents [7][8][9][10] and vapor pressure data [11].…”

Section: Introductionmentioning

confidence: 99%

Vapor pressure measurement for binary and ternary systems containing a phosphoric ionic liquid

Zhao

Jiang

et al. 2006

Fluid Phase Equilibria

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117

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“…38,39 Figure 2 displays a schematic diagram of the dual circulation still. The vapor and liquid phases are both circulated in the still.…”

Section: Determination Of the Vlementioning

confidence: 99%

A new process for fuel ethanol dehydration based on modeling the phase equilibria of the anhydrous MgCl₂ + ethanol + water system

Zeng

2014

AIChE Journal

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The use of ethanol as a fuel for motor engines has attracted significant attention because of its possible environmental and economic advantages over fossil fuel. However, the energy demand for the ethanol dehydration process significantly impacts its production cost. A new and energy efficient process is developed on the basis of salt extractive distillation, which uses recycled MgCl 2 granules as a separating agent. Vapor-liquor-equilibria (VLE) data for the ternary MgCl 2 1 ethanol 1 water system, and the three constituent binary systems were measured at 30, 60, 90, and 101.3 kPa. A large enhancement of relative volatility of the ethanol 1 water system in the presence of MgCl 2 is observed throughout the entire ethanol concentration range, which completely broke the azeotrope. The salt effect of MgCl 2 is thought to be the result of energetic interactions and the hydration equilibrium reaction of the Mg 21 ion with water molecules. The calculation results by the mixed-solvent electrolyte model embedded in the OLI platform equipped with new model interaction parameters and equilibrium constant (obtained via the regression of experimental VLE data), provided for a satisfactory means of simulating the MgCl 2 salt extractive distillation process. Finally, the process was proven feasible at the laboratory-scale resulting in large granules of recovered MgCl 2 and a product of 99.5 wt % ethanol.

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Isobaric vapor–liquid equilibria for ethanol–water system containing different ionic liquids at atmospheric pressure

Cited by 117 publications

References 22 publications

Synthesis of 1,3-Dimethylimidazolium Chloride and Volumetric Property Investigations of Its Aqueous Solution

Synthesis of 1,3-Dimethylimidazolium Chloride and Volumetric Property Investigations of Its Aqueous Solution

Vapor pressure measurement for binary and ternary systems containing a phosphoric ionic liquid

A new process for fuel ethanol dehydration based on modeling the phase equilibria of the anhydrous MgCl₂ + ethanol + water system

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Isobaric vapor–liquid equilibria for ethanol–water system containing different ionic liquids at atmospheric pressure

Cited by 117 publications

References 22 publications

Synthesis of 1,3-Dimethylimidazolium Chloride and Volumetric Property Investigations of Its Aqueous Solution

Synthesis of 1,3-Dimethylimidazolium Chloride and Volumetric Property Investigations of Its Aqueous Solution

Vapor pressure measurement for binary and ternary systems containing a phosphoric ionic liquid

A new process for fuel ethanol dehydration based on modeling the phase equilibria of the anhydrous MgCl2 + ethanol + water system

Contact Info

Product

Resources

About

A new process for fuel ethanol dehydration based on modeling the phase equilibria of the anhydrous MgCl₂ + ethanol + water system