Isobaric Vapor−Liquid Equilibria and Excess Properties for the Binary Systems of Methyl Esters + Heptane

Abstract

The behavior was investigated for several binary mixtures that were composed of five methyl esters (from methanoate to pentanoate) with n-heptane, by using different thermodynamic quantities as obtained from experimental results such as isobaric vapor-liquid equilibria at the pressure 101.32 kPa and the corresponding excess properties. The equilibrium data show that all the mixtures reveal a positive deviation from ideality and that they are consistent with a point-to-point test. All the mixtures studied, with the exception of methyl pentanoate + n-heptane, reveal an azeotrope. Various equations were used to treat the equilibrium data. The use of a new polynomial correlation with temperature-dependent coefficients was deemed to be convenient. Various theoretical models were used in this study, including UNIFAC and ASOG, but the Gmehling et al. version was found to be more acceptable when estimating excess enthalpies with differences of between (3 and 17)%.

Multiproperty modeling for a set of binary systems. Evaluation of a model to correlate simultaneously several mixing properties of methyl ethanoate+alkanes and new experimental data

“…The correlation curves for these properties for each system are represented together with the experimental values in The experimental values are almost identical to ones we recorded and published previously [13,[18][19][20][21][22][23][24] and are similar to those recorded by Awwad et al [28], however they were significantly different to those of other authors [14,26,[29][30][31][32][33]. At the temperature of 318.15 K (see Fig.…”

“…The series of data (x 1 , , v E ) are shown in Table S1 in Supporting information (SI) while Table S2 (SI) shows the pairs of values (x 1 , h E ) at 291.15 K for all the mixtures and at the temperature 318.15 K only for those corresponding to even hydrocarbons. The values of h E at the temperature of 298.15 K for these mixtures have been presented in previous works [13,[18][19][20][21][22][23][24][25].…”

“…For this work, isobaric VLE were experimentally determined at 101.32 kPa for six binary systems of methyl ethanoate CH 3 COOCH 3 with one of the six saturated hydrocarbons C 5 to C 10 , because no isobaric studies were found in the literature with the exception of CH 3 COOCH 3 + C 7 H 16 system [13]. Many of the mixtures considered here have also been studied previously using some mixing properties, such as iso-T VLE [14,15], LLE [16,17], v E , h E [13,14, and c E p [29].…”

“…Many of the mixtures considered here have also been studied previously using some mixing properties, such as iso-T VLE [14,15], LLE [16,17], v E , h E [13,14, and c E p [29]. Table 1 shows a summary of the properties measured by other authors, although only some of them are available for our study, such as is noted in Table 1 and explained in the following sections.…”

Multiproperty Correlation of Experimental Data of the Binaries Propyl Ethanoate + Alkanes (Pentane to Decane). New Experimental Information for Vapor–Liquid Equilibrium and Mixing Properties

“…It is important to contribute new experimental data which, in addition to the above, enable knowledge of the capacity of the model to represent several of the systems' properties. In this line, studies on methyl 1 and ethyl 2,3 ethanoates have been published, and in this work the properties of mixtures of propyl ethanoate with six alkanes, from pentane to decane, are presented. Specifically 4,5 at two of the indicated temperatures, 298 K and 318 K; isobaric VLE data of propyl ethanoate + (C 7 ,C 9 ) have also been published previously.…”