Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

ABSTRACT

Excess molar enthalpies of {x1 tert-butyl methyl ether (MTBE) + x2 1-pentanol+ (1-x1-x2) decane} and, the involved binary mixtures {x tert-butyl methyl ether (MTBE) + (1-x) decane} and {x 1-pentanol+ (1-x) decane} have been determined at the temperature of 298.15 K and atmospheric pressure, over the whole composition range, using a Calvet microcalorimeter. The results were fitted by means of different variable degree polynomials. In the present work, we propose a new expression to fit the ternary excess molar enthalpy, which do take into account the asymmetric shape of the involved binary systems. The group contribution model of the UNIFAC (in the versions of Larsen, and Gmehling) were used to estimate excess enthalpy values. Several empirical expressions for estimating ternary properties from binary results were also tested.