Excess molar enthalpies of the ternary system mtbe+ethanol+hexane

Thermodynamics of biofuels: Excess enthalpies for binary mixtures involving ethyl 1,1-dimethylethyl ether and hydrocarbons at different temperatures using a new flow calorimeter

“…Its uncertainty is similar to the commercial isothermal flow calorimeter that already exists. Moreover the systems {methyl 1,1-dimethylethyl ether (MTBE) + heptane} and {methyl 1,1-dimethylethyl ether (MTBE) + 1-propanol} were measured at T = 298.15 K and compared with the literature values [10][11][12][13][14][15]. For both systems, the best results, the least values of standard deviations and maximum deviations were obtained in our measurements.…”

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

“…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 …”

“…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.…”

“…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.…”

“…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.…”