Study on the effect of increasing the chain length of the alkanol in excess molar enthalpies of mixtures containing 2-methoxy-2-methylpropane, 1-alkanol, decane

Mato, M. M.; Illobre, M.; Verdes, P. V.; Legido, J.L.; Andrade, M. I. Paz

doi:10.1016/j.fluid.2010.02.012

Cited by 5 publications

(4 citation statements)

References 23 publications

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“…The excess molar enthalpy H m,123 E of the ternary systems MTBE + ethanol + alkane (hexane, heptane, octane, decane) is also positive over the whole composition diagram, reaching its maximum values at x 1 = 0.3960, x 2 = 0.2490, x 3 = 0.3550, H m,123 E (hexane) = 802 J·mol –1 ; x 1 = 0.3270, x 2 = 0.2510, x 3 = 0.4220, H m,123 E (heptane) = 894 J·mol –1 ; at x 1 = 0.3480, x 2 = 0.2410, x 3 = 0.4110, H m,123 E (octane) = 920 J·mol –1 , x 1 = 0.3530, x 2 = 0.2470, x 3 = 0.4000, H m,123 E = 984 J·mol –1 (decane), respectively. Similar behavior is shown in the experimental data published by Zhu et al for MTBE + ethanol + hexane or octane …”

Section: Resultsmentioning

confidence: 99%

“…Besides, both for binary systems MTBE + alkane (hexane, , heptane, ,, octane, , nonane, decane , ) as for the binary mixtures ethanol + alkane (hexane, ,, heptane, , octane, ,, nonane, decane ,, ), excess molar enthalpy increases with the increasing chain length of the alkane.…”

Section: Resultsmentioning

confidence: 99%

“…This paper contributes to the series of ternary mixtures reported in earlier works, − where excess molar enthalpies of binary and ternary mixtures containing as components 2-methoxy-2-methylpropane (MTBE), alkanols, and alkanes, used as oxygenating agents in gasoline technology, were studied. All of them are part of the scientific project entitled “Study on Physical Properties of Mixtures Hydrocarbon + Alcohol + Ether Like Alternative Fuels”, whose main objective has been the characterization of nonelectrolyte liquids and their mixtures, through experimental determination of thermophysical properties on mixing.…”

Section: Introductionmentioning

confidence: 99%

“…Following the above considerations, it is desirable to know the thermodynamic properties of binary and ternary mixtures formed by MTBE, hydrocarbons, and alkanols. Our group has reported thermodynamic properties of various similar mixtures; − the study is now continued considering ethanol as second component and nonane as the third component in the present work. This should help to study the effect of alkane chain length in the binary mixtures involved and subsequent effects on the ternary mixture.…”

Section: Introductionmentioning

confidence: 99%

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Excess Molar Enthalpies of Ternary and Binary Mixtures Containing 2-Methoxy-2-Methylpropane, Ethanol, and Nonane

et al. 2011

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This paper contributes to the series of ternary mixtures reported in earlier works, 1À12 where excess molar enthalpies of binary and ternary mixtures containing as components 2-methoxy-2-methylpropane (MTBE), alkanols, and alkanes, used as oxygenating agents in gasoline technology, were studied. All of them are part of the scientific project entitled "Study on Physical Properties of Mixtures Hydrocarbon + Alcohol + Ether Like Alternative Fuels", whose main objective has been the characterization of nonelectrolyte liquids and their mixtures, through experimental determination of thermophysical properties on mixing.In this framework, the excess molar enthalpy determination is considered of primary interest from a thermodynamic point of view, as this property is essential in characterizing the mixing process. The sign, magnitude, and symmetry of this quantity is a direct result of bond breaking and rearranging during the mixing process, and any effect arising from energetic interactions between both like and unlike molecules will be directly reflected in the enthalpy data and their representations, which is essential when studying new theoretical approaches to the liquid state of matter and its mixtures. From a theoretical point of view, mixtures of alkanols and ethers are of interest due to their complexity, consequently on the self-association of the alcohols, which is partially destroyed by the active ether molecules, and on the new intermolecular OHÀO bonds created. The complexity is increased when the mixture also contains one or more alkanes.Following the above considerations, it is desirable to know the thermodynamic properties of binary and ternary mixtures formed by MTBE, hydrocarbons, and alkanols. Our group has reported thermodynamic properties of various similar mixtures; 1À12 the study is now continued considering ethanol as second component and nonane as the third component in the present work. This should help to study the effect of alkane chain length in the binary mixtures involved and subsequent effects on the ternary mixture.So, the aim of this investigation was to measure, using a Calvet microcalorimeter, experimental excess molar enthalpies, over the whole composition range, for the ternary system {x 1 MTBE + x 2 ethanol + (1 À x 1 À x 2 ) nonane} and the involved binary mixture {x ethanol + (1 À x) nonane} at the temperature of 298.15 K and atmospheric pressure. The binary experimental data for the mixtures {x MTBE + (1 À x) ethanol} and {x MTBE + (1 À x) nonane} were reported in previous works. 12,10 The results were fitted by means of polynomials of different variable degrees.The literature referring to the binary systems {x 1-alkanol + (1 À x) alkane} is very large. Christensen et al. 13 conducted measurements of H m E of {x ethanol + (1 À x) nonane} at 298.15 K and 170 kPa. Savini et al. 14 report experimental data for this mixture at 303.15 K and 318.15 K, and Kwon et al. 15 published experimental data at 313.15 K.The only experimental data of excess molar enthalpy, related to ternary mix...

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