Excess molar enthalpies for the ternary system {x1 2-methoxy-2-methylpropane (MTBE) + x2 1-propanol + (1 - x1 - x2) nonane} and the involved binary mixture {x 1-propanol + (1 - x) nonane} have been measured at the temperature of 298.15 K and atmospheric pressure, over the whole composition range. No experimental excess enthalpy values were found in the currently avaliable literature for the ternary and binary mixtures under study in similar conditions. Values of excess molar enthalpies were measured using a Calvet microcalorimeter. The results were fitted by means of different variable degree polynomials. Smooth representations of the results are presented and used to construct constant excess molar enthalpy contours on Roozeboom diagrams. The group contribution model of the UNIFAC model (in the versions of Larsen et al. and Gmehling et al.) was used to estimate ternary excess enthalpy values. Several empirical expressions for estimating ternary properties from binary results were also tested.
Compounds
#
Formula
Name
1
C5H12O
2-methoxy-2-methylpropane
2
C3H8O
propan-1-ol
3
C9H20
nonane
Datasets
The table above is generated from the ThermoML associated json file (link above).
POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied;
the numbers refer to the table of compounds on the left.
Type
Compound-#
Property
Variable
Constraint
Phase
Method
#Points
POMD
2
3
Excess molar enthalpy (molar enthalpy of mixing), kJ/mol ; Liquid
Mole fraction - 2; Liquid
Temperature, K; Liquid
Pressure, kPa; Liquid
Liquid
Calvet calorimetry
15
POMD
2
3
1
Excess molar enthalpy (molar enthalpy of mixing), kJ/mol ; Liquid