Vapor-liquid equilibrium in capillary distillation

Yeh, George; Yeh, Bao-Tzang; Schmidt, Szilvia; Yeh, M. S.; McCarthy, A.M.; Celenza, W.J.

doi:10.1016/0011-9164(91)85052-v

Cited by 25 publications

(18 citation statements)

References 14 publications

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“…This would be the surface tension augmented by the interfacial effects evoked above. On the experimental side, the vapor-liquid equilibration studies have abundantly demonstrated [51][52][53][54][55][56][57] that the vapor pressures of pure liquids trapped in sintered stainless steel porous plates are decreasing more than the prediction by the Kelvin equation, for diameters up to 30 µm 56 .…”

Section: Discussionmentioning

confidence: 99%

Oversolubility in the microvicinity of solid–solution interfaces

Bergonzi

Mercury

Simon

et al. 2016

Phys. Chem. Chem. Phys.

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Water-solid interactions at the macroscopic level (beyond tens of nanometers) are often viewed as the coexistence of two bulk phases with a sharp interface in many areas spanning from biology to (geo)chemistry and various technological fields (membranes, microfluidics, coatings, etc.). Here we present experimental evidence indicating that such a view may be a significant oversimplification. High-resolution infrared and Raman experiments were performed in a 60 × 20 μm(2) quartz cavity, synthetically created and initially filled with demineralized water. The IR mapping (3 × 3 μm(2) beam size) performed using the SOLEIL synchrotron radiation source displays two important features: (i) the presence of a dangling free-OH component, a signature of hydrophobic inner walls; (ii) a shift of the OH-stretching band which essentially makes the 3200 cm(-1) sub-band predominate over the usual main component at around 3400 cm(-1). Raman maps confirmed these signatures (though less marked than IR's) and afforded a refined spatial distribution of this interfacial signal. This spatial resolution, statistically treated, results in a puzzling image of a 1-3 μm thick marked-liquid layer along the entire liquid-solid interface. The common view is then challenged by this strong evidence that a μm-thick layer analogous to an interphase forms at the solid-liquid interface. The thermodynamic counterpart of the vibrational shifts amounts to around +1 kJ mol(-1) at the interface with a rapidly decreasing signature towards the cavity centre, meaning that vicinal water may form a reactive layer, of micrometer thickness, expected to have an elevated melting point, a depressed boiling temperature, and enhanced solvent properties.

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Section: Discussionmentioning

confidence: 99%

Oversolubility in the microvicinity of solid–solution interfaces

Bergonzi

Mercury

Simon

et al. 2016

Phys. Chem. Chem. Phys.

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“…In fact, [ 1 0 1 _ T D $ D I F F ] [ 8 2 _ T D $ D I F F ] capillary distillations in separation process for strongly associating fluids using polar mediums are meant to benefit from this broadening two-phase region, which ultimately pushes the azeotrope to the side of less polar pure component [28,29]. For example, the azeotrope of the bulk ethanol/water was both calculated and experimentally to be at about 5-mol% of water, as shown in Fig.…”

Section: Binary Mixturementioning

confidence: 98%

Equation-of-state modeling of associating-fluids phase equilibria in nanopores

Tan

Piri

2015

Fluid Phase Equilibria

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“…However, the studies of Yeh et al (4)(5)(6), Abu Al-Rub et al (7), Abu Al-Rub and Datta (8)(9)(10), and Wong (11) show that the Kelvin effect is negligible for pores of radii Ͼ 0.1 m. Abu Al-Rub and Datta (9-10) analyzed the VLE in porous media using a molecular thermodynamics approach. They concluded that the main factor affecting the alteration of VLE in porous media is the intermolecular interaction between the liquids and the solid.…”

Section: Introductionmentioning

confidence: 97%

“…An innovative alternative separation method, called capillary distillation, was proposed by Yeh et al (4)(5)(6) and later Abu Al-Rub et al (7) and Abu AlRub and Datta (8)(9)(10) to separate binary mixtures with an azeotropic point. Capillary distillation is a new method that utilizes the surface forces of the solids and the consequent intermolecular interactions between the solid and liquids, which in turn alter the intermolecular interactions among the solution components, thus altering the VLE.…”

Section: Introductionmentioning

confidence: 99%

Isothermal Vapor–Liquid Equilibrium of Ethanol–Water Mixtures + Acetone–Ethanol Mixtures Inside Capillary Porous Plates

Al‐Rub

Datta

2000

Separation Science and Technology

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Isothermal vapor-liquid equilibrium (VLE) of ethanol-water mixtures at different temperatures and the isothermal VLE of acetone-ethanol mixtures at 305.15 K were experimentally measured in three different macroporous plates: a 13.5-m pore diameter sintered stainless steel plate, a 30-m pore diameter porous carbon plate, and a 30-m pore diameter porous Teflon plate. The experimental results showed that the VLE of the ethanol-water system in the porous sintered stainless steel plate was dramatically altered, and the azeotropic point was shifted from ethanol mole fraction of 0.90 to Ͼ 0.99. However, there was no significant effect of this plate on the acetone-ethanol system. The effect of either the porous Teflon plate or the porous carbon plate on the VLE was insignificant for both systems. These results show that for substantial alteration of the VLE binary mixtures, two conditions are required: the liquid components must be of different polarity, and the porous plate should possess high polarization.

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Vapor-liquid equilibrium in capillary distillation

Cited by 25 publications

References 14 publications

Oversolubility in the microvicinity of solid–solution interfaces

Oversolubility in the microvicinity of solid–solution interfaces

Equation-of-state modeling of associating-fluids phase equilibria in nanopores

Isothermal Vapor–Liquid Equilibrium of Ethanol–Water Mixtures + Acetone–Ethanol Mixtures Inside Capillary Porous Plates

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