Molar isopycnicity in heterogeneous binary mixtures

Tardón, María José; Garrido, José Matías; Quinteros-Lama, Héctor; Mejı́a, Andrés; Segura, Hugo

doi:10.1016/j.fluid.2012.07.034

Cited by 15 publications

(18 citation statements)

References 44 publications

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“…65,66 In particular, isopycnic curves, along which the phase density inversions take place, are clearly observed to occur in an equilibrium range that goes from the LLV three-phase line up to the vapourliquid critical line of the mixture. 74 In this work, due to the symmetrical nature of the interactions, molar density of both phase liquids at the LLV coexistence line is identical, and hence, all the states along the three-phase line are isopycnic states.…”

Section: Resultsmentioning

confidence: 79%

“…Tardón et al 74 have demonstrated recently from computer simulation and the use of the density gradient theory that this particular phase behavior of mixtures that exhibit liquid-liquid immiscibility produces a drastic distortion of the total density profile of the system along the liquid-liquid interface. We think the desorption phenomena observed in the total density profile of the mixture shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

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Liquid-liquid interfacial properties of a symmetrical Lennard-Jones binary mixture

Martínez-Ruiz

Bravo

Blas

2015

The Journal of Chemical Physics

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Articles you may be interested in (2014)], to deal with the interaction energy and microscopic components of the pressure tensor. We perform Monte Carlo simulations in the canonical ensemble to obtain the interfacial properties of the symmetrical mixture with different cut-off distances r c and in combination with the inhomogeneous long-range corrections. The pressure tensor is obtained using the mechanical (virial) and thermodynamic route. The liquid-liquid interfacial tension is also evaluated using three different procedures, the IrvingKirkwood method, the difference between the macroscopic components of the pressure tensor, and the test-area methodology. This allows to check the validity of the recent extensions presented to deal with the contributions due to long-range corrections for intermolecular energy and pressure tensor in the case of binary mixtures that exhibit liquid-liquid immiscibility. In addition to the pressure tensor and the surface tension, we also obtain density profiles and coexistence densities and compositions as functions of pressure, at a given temperature. According to our results, the main effect of increasing the cut-off distance r c is to sharpen the liquid-liquid interface and to increase the width of the biphasic coexistence region. Particularly interesting is the presence of a relative minimum in the total density profiles of the symmetrical mixture. This minimum is related with a desorption of the molecules at the interface, a direct consequence of a combination of the weak dispersive interactions between unlike species of the symmetrical binary mixture, and the presence of an interfacial region separating the two immiscible liquid phases in coexistence. C 2015 AIP Publishing LLC.[http://dx

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Section: Resultsmentioning

confidence: 79%

Section: Resultsmentioning

confidence: 99%

Liquid-liquid interfacial properties of a symmetrical Lennard-Jones binary mixture

Martínez-Ruiz

Bravo

Blas

2015

The Journal of Chemical Physics

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“…a hypothesis paper 2012 [171] Supercritical CO 2 extraction of allicin from garlic flakes: Screening and kinetic studies 2012 [48] Molar isopycnicity in heterogeneous binary mixtures 2012 [172] Optimization of a cubic equation of state and van der Waals mixing rules for modeling the phase behavior of complex mixtures 2012 [173] Stevia rebaudiana Bertoni, source of a high-potency natural sweetener: A comprehensive review on the biochemical, nutritional and functional aspects 2012 [174] Solubility of beta-carotene in ethanol-and triolein-modified CO 2 2011 [175] Simulation of a supercritical carbon dioxide extraction plant with three extraction vessels 2011 [176] Solubility of nutraceutical carotenoid compounds in pure supercritical CO 2 and modified with triolein or ethanol 2010 [22] Solubilities in supercritical carbon dioxide of (2E,6E)-3,7,11-Trimethyldodeca-2,6,10-trien-1-ol (Farnesol) and (2S)-5,7-Dihydroxy-2-(4-hydroxyphenyl)chroman-4-one (Naringenin) 2010 [177] Data analysis, modeling and thermodynamic consistency of CO 2 + beta-carotene high pressure mixtures 2010 [178] Reactions in supercritical fluids Recent trends in biocatalysis engineering 2012 [179] COLOMBIA Extraction applications…”

Section: Analytical Applicationsmentioning

confidence: 99%

Applications of Supercritical Fluids in Latin America: Past, Present and Future Trends

Moraes¹,

Zabot²,

Angela³

2014

fph

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Latin America possesses expansive natural resources, which has attracted scientists from several areas to study means of improving the use of these resources. Supercritical fluids have been used for such purposes in many technological applications. Therefore, this paper provides an overview of Latin America scientific findings on supercritical technologies. Web of Science and Scopus were used as reference databases to search for information dated from 2004-2013. The Latin-American studies were classified into 6 main areas: extraction & mathematical modeling (57%), emerging applications (15%), thermodynamics & fundamentals (9%), reviews & perspectives (8%), reactions in supercritical media (7%) and analytical applications (4%). A compilation of scientific documents from 1994-2003 indicates that supercritical technology has progress greatly over the last 10 years in the major scientific countries in Latin America, such as Brazil, Argentina, Chile, Mexico and Colombia. These advances are associated with the development of new research subjects. Emerging applications, such as micronization and the encapsulation of nanoparticles, adsorption processes, gas sensors development, power generation and bioresidue hydrolyzation, are reported.

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“…In general, density inversions may be primarily classified in terms of mass or molar barotropy depending on the units in which volumes become equivalent at the specific isopycnic conditions. Particularly, from a mechanical viewpoint, mass barotropy is a phenomenon that affects the relative position of the involved phases in a gravitational field, while it has been reported that the total population of species (or total density profiles) is affected along the interfacial length for the case of molar barotropy [4].…”

Section: Introductionmentioning

confidence: 99%

“…In a recent publication, Tardón et al [4] developed a set of rigorous mathematical conditions for detecting ranges of molar isopycnicity. As it was established in that paper, in addition to the necessary conditions of phase equilibrium, a heterogeneous mixture exhibiting molar isopycnicity between its˛-ˇphases is characterized by an inversion of molar volumes,ṽ (or molar densities ), v˛=ṽˇ⇔ ˛= ˇ( 1)…”

Section: Introductionmentioning

confidence: 99%