US EPA

1178473 

Journal Article 

Excess thermodynamic properties of binary and ternary mixtures containing methyl 1,1-dimethylethyl ether (MTBE), n-heptane, and methanol at T=313.15 K 

Segovia, JJ; Martin, MC; Chamorro, CR; Villamanan, MA 

1999 

1 

Journal of Chemical Thermodynamics
ISSN: 0021-9614 

31 

9 

1231-1246 

10.1006/jcht.1999.0532 

WOS:000082451800009 

(Vapour + liquid) equilibrium of {methyl 1,1-dimethylethyl ether (MTBE) + n-heptane + methanol}, (methyl 1,1-dimethylethyl ether (MTBE)+ methanol}, and (methanol + n-heptane) have been measured at T = 313.15 K. The data reduction by Barker's method provides correlations for the excess molar Gibbs energy G(m)(E) using the Margules equation for the binary systems, and the Wohl expansion for the ternary. The Wilson, NRTL, and UNIQUAC models have been applied successfully to both the binary and ternary systems reported here. Using literature data of the excess molar enthalpy H-m(E) for the same ternary mixture measured at T = 313.15 K, we have calculated the excess molar entropy S-m(E) for the system at the same temperature. (C) 1999 Academic Press. 

VLE data; correlations; excess Gibbs energy; excess properties; binary mixtures; ternary mixtures