Comments on “Experimental Isobaric Vapor−Liquid Equilibrium Data for Binary Mixtures of Cyclic Ethers with (1-Methylethyl)benzene” (Gill, B. K.; Rattan, V. K.; Kapoor, S. J. Chem. Eng. Data 2008, 53, 2041−2043)

Wisniak, Jaime; Segura, Hugo

doi:10.1021/je8006953

Cited by 2 publications

(2 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In Table 4, the absolute tency tests, a situation that may question their usefulness. [25][26][27] Perfect data satisfy exactly the Gibbs-Duhem relation, but acceptable data obey it within a tolerable limit (consistency criteria) which does not give a unique answer, regarding the quality of the data, when different consistency procedures are used. As with any approximation, application of consistency tests requires rigor, reasonable assumptions and models, and an examination of the data and results of the test.…”

Section: Resultsmentioning

confidence: 99%

“…Consistency tests are techniques that allow, in principle, the assessment of experimental VLE data on the basis of the Gibbs−Duhem equation. Much empiricism and arbitrariness is frequently observed in the analysis and application of consistency tests, a situation that may question their usefulness. − Perfect data satisfy exactly the Gibbs−Duhem relation, but acceptable data obey it within a tolerable limit (consistency criteria) which does not give a unique answer, regarding the quality of the data, when different consistency procedures are used. As with any approximation, application of consistency tests requires rigor, reasonable assumptions and models, and an examination of the data and results of the test.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Isobaric Vapor−Liquid Equilibria for Binary and Ternary Mixtures of Methanol, Ethanoic Acid, and Propanoic Acid

et al. 2010

View full text Add to dashboard Cite

Vapor-liquid equilibrium (VLE) data for the strongly associating ternary system methanol + ethanoic acid + propanoic acid and three constituent binary systems: methanol + ethanoic acid, methanol + propanoic acid, and ethanoic acid + propanoic acid have been determined by different liquid-phase compositions using a novel pump ebulliometer at 101.3 kPa. The vapor-phase compositions y of these binary systems had been calculated from T-p-x according to the Q function of molar excess Gibbs energy by the indirect method. The experimental T-x data are used to estimate Wilson, nonrandom two-liquid (NRTL), Margules, and van Laar model parameters, and these parameters in turn are used to calculate vapor-phase compositions y. The activity coefficients of the solution were correlated with its composition by the Wilson, NRTL, Margules, and van Laar models through the least-squares method. The VLE data of the ternary system were well-predicted from these binary interaction parameters of the Wilson, NRTL, Margules, and van Laar model parameters without any additional adjustment to build the thermodynamic model of VLE for the ternary system and obtain the vapor-phase compositions y and the calculated bubble points. The calculated bubble points with the model parameters of activity coefficients were in good agreement with the experimental data.

show abstract

Section: Resultsmentioning

confidence: 99%