ABSTRACT

The objective of this work was to study the behavior of the azeotropic points of the methanol + DMC system under elevated pressures. We obtained isothermal vapor-liquid equilibria (VLE) data for this system at 383.15, 403.15, and 413.15 K by a static method. The azeotropic points were determined from the experimental VLE data. The temperature and pressure dependencies of the determined azeotropic points are discussed and compared with ones measured at reduced pressure. The experimental VLE data were represented by two activity coefficient models (non-random two-liquid and Wilson models). We also tested the modified UNIFAC (Dortmund) model for prediction of the VLE and azeotropic points. The azeotropic points of this system could be obtained over the pressure range from reduced pressures to elevated ones.

Compounds

#	Formula	Name
1	CH4O	methanol
2	C3H6O3	dimethyl carbonate
3	C2H6O	ethanol
4	H2O	water

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	1	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Vibrating tube method	1
POMD	1	Vapor or sublimation pressure, kPa ; Liquid	Temperature, K; Liquid		Liquid Gas	Closed cell (Static) method	11
POMD	2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Vibrating tube method	1
POMD	2	Vapor or sublimation pressure, kPa ; Liquid	Temperature, K; Liquid		Liquid Gas	Closed cell (Static) method	3
POMD	3	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Vibrating tube method	1
POMD	3	Vapor or sublimation pressure, kPa ; Liquid	Temperature, K; Liquid		Liquid Gas	Closed cell (Static) method	1
POMD	4	Vapor or sublimation pressure, kPa ; Liquid	Temperature, K; Liquid		Liquid Gas	Closed cell (Static) method	1
POMD	3 4	Mole fraction - 3 ; Gas	Mole fraction - 3; Liquid	Temperature, K; Gas	Gas Liquid	Chromatography	16
POMD	3 4	Vapor or sublimation pressure, kPa ; Gas	Mole fraction - 3; Liquid	Temperature, K; Gas	Gas Liquid	Closed cell (Static) method	16
POMD	1 2	Mole fraction - 1 ; Gas	Mole fraction - 1; Liquid Temperature, K; Liquid		Gas Liquid	Chromatography	39
POMD	1 2	Vapor or sublimation pressure, kPa ; Gas	Mole fraction - 1; Liquid Temperature, K; Liquid		Gas Liquid	Closed cell (Static) method	39
POMD	1 2	Azeotropic pressure, kPa ; Liquid	Temperature, K; Liquid		Liquid Gas	By X=Y	3
POMD	1 2	Azeotropic composition: mole fraction - 1 ; Liquid	Temperature, K; Gas		Liquid Gas	By X=Y	3

Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

Isothermal vapor-liquid equilibria at 383.15-413.15 K for the binary system methanol + dimethyl carbonate and the pressure dependency of the azeotropic point

Matsuda, Hiroyuki, Negishi, Mitsuaki, Iino, Shinya, Constantinescu, Dana, Kurihara, Kiyofumi, Tochigi, Katsumi, Ochi, Kenji, Gmehling, Juergen

ABSTRACT