Theoretical study of vapor pressure of pure liquids in porous media

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

“…1 shows the experimental capillary-condensation pressure of some associating fluids (water [12,13], ethanol [14,15], and acetone [15]) compared to that of non-associating fluids (N 2 [16], CO 2 [17] and argon [17]). Pressures and temperatures are scaled using bulk properties, i.e., the saturated pressure P 0 and the critical temperature T C .…”

“…Pressures and temperatures are scaled using bulk properties, i.e., the saturated pressure P 0 and the critical temperature T C . While the data of water, ethanol, and acetone in porous plates [13,15] were directly measured, the other data were derived from adsorption isotherms where the condensation pressures were estimated when the isotherms undergo abrupt change [1]. This estimation procedure may introduce some uncertainties but they are insufficient to cause ambiguity in interpreting Fig.…”

“…Capillary condensation of associating molecules compared to that of nonassociating molecules. Experimental data: water in MCM-41 [12]; water in carbon plate [13]; ethanol in MCM-41 [14]; ethanol and acetone in steel and carbon plates [15]; N 2 [16]; CO 2 and argon 17]. The numbers next to the porous mediums are the pore radii.…”

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

“…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.…”

“…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.…”