Thermodynamics of binary mixtures containing organic carbonates. 2. Isothermal vapor-liquid equilibria for dimethyl carbonate + cyclohexane + benzene, or + tetrachloromethane

Cocero, Marı́a José; Mato, Fidel; García, Isaias; Cobos, José Carlos; Kehiaian, H.V.

doi:10.1021/je00055a021

Cited by 31 publications

(26 citation statements)

References 3 publications

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“…For the feeds at x 0,1 = 0.275 and x 0,1 = 0.45, negative values of the PTPD are observed, so these are not stable as a single phase. These results are all in agreement with the work of Cocero et al [28].…”

Section: Problemsupporting

confidence: 94%

“…For this problem we consider the binary mixture of dimethyl carbonate (component 1) and cyclohexane (component 2) at T = 298.15 K, the phase behavior of which was measured and modeled by Cocero et al [28]. NRTL parameters were determined from experimental data as A 12 The interval-Newton methodology was applied to compute the stationary points for several feed compositions for this system at P = 16.5 kPa (close to a homogeneous azeotrope at about 16.8 kPa), with the results as shown in Table 2.…”

Section: Problemmentioning

confidence: 99%

See 1 more Smart Citation

Reliable phase stability analysis for asymmetric models

Xu¹,

Haynes

Stadtherr

2005

Fluid Phase Equilibria

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A deterministic technique for reliable phase stability analysis is described for the case in which asymmetric modeling (different models for vapor and liquid phases) is used. In comparison to the symmetric modeling case, the use of multiple thermodynamic models in the asymmetric case adds an additional layer of complexity to the phase stability problem. To deal with this additional complexity we formulate the phase stability problem in terms of a new type of tangent plane distance function, which uses a binary variable to account for the presence of different liquid and vapor phase models. To then solve the problem deterministically, we use an approach based on interval analysis, which provides a mathematical and computational guarantee that the phase stability problem is correctly solved, and that thus the global minimum in the total Gibbs energy is found in the phase equilibrium problem. The new methodology is tested using several examples, involving as many as eight components, with NRTL as the liquid phase model and a cubic equation of state as the vapor phase model. In two cases, published phase equilibrium computations were found to be incorrect (not stable).

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Section: Problemsupporting

confidence: 94%

Section: Problemmentioning

confidence: 99%

Reliable phase stability analysis for asymmetric models

Xu¹,

Haynes

Stadtherr

2005

Fluid Phase Equilibria

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show abstract

“…Up to now, we have found in the literature (vapour + liquid) equilibrium data, (9)(10)(11)(12) excess molar enthalpies (13)(14)(15) at T = 298.15 K, and excess molar volumes (12,16,17) at T = 298.15 K for (di-n-alkyl carbonate + benzene) as well as activity coefficients at infinite dilution (18) at T = 318 K, excess molar enthalpies (13)(14)(15) and excess molar volumes (16,17) at T = 298.15 K for (di-n-alkyl carbonate + toluene).…”

Section: Introductionmentioning

confidence: 98%

Temperature dependence of the excess molar volume of (dimethyl carbonate, or diethyl carbonate+ toluene) fromT= 278.15 K to 323.15 K

López

Lugo

Comuñas

et al. 2000

The Journal of Chemical Thermodynamics

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“…Previous studies dealt mainly with the composition dependence of the excess molar volume V E m , (1)(2)(3) excess molar enthalpy H E m , (4,5) and excess molar Gibbs energy G E m (6,7) at the temperature 298.15 K, and at atmospheric pressure. González et al (8) reported (liquid + liquid) equilibrium data (l.l.e.)…”

Section: Introductionmentioning

confidence: 99%