ABSTRACT

Experimental (vapor + liquid) equilibrium data were obtained at sub-atmospheric pressures of (6.66, 13.33, 19.99, 26.66, 33.33, 39.99 and 46.66) kPa for the binary system (1,2-propanediol + 1,3-propanediol) over the entire composition range using Swietoslasky-type ebulliometer. Wilson and NRTL activity coefficient models were used to correlate the experimental VLE data for which optimum binary interaction energy parameters are reported. NRTL model fitted well with experimental data as compared to Wilson model. Density and refractive indices of binary mixtures are also reported along with their excess properties such as excess molar volumes (VE m), excess refractive index (nE), partial molar volume ( Vi), apparent molar volume oV;iP, and excess partial molar volume ( VEi ) at different temperatures (293.15 to 318.15) K. The excess molar volumes data were used to test the applicability of Prigogine Flory Patterson theory and refractive index values to test different mixing rules.

Compounds

#	Formula	Name
1	C3H8O2	1,2-propanediol
2	C3H8O2	propan-1,3-diol

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	Vapor or sublimation pressure, kPa ; Liquid	Temperature, K; Liquid		Liquid Gas	Ebulliometric method (Recirculating still)	21
POMD	1	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Standard Abbe refractometry	6
POMD	1	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	6
POMD	1	Refractive index (other wavelength) ; Liquid	Temperature, K; Liquid Wavelength, nm; Liquid	Pressure, kPa; Liquid	Liquid	Standard Abbe refractometry	48
POMD	2	Vapor or sublimation pressure, kPa ; Liquid	Temperature, K; Liquid		Liquid Gas	Ebulliometric method (Recirculating still)	20
POMD	2	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Standard Abbe refractometry	6
POMD	2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	6
POMD	2	Refractive index (other wavelength) ; Liquid	Temperature, K; Liquid Wavelength, nm; Liquid	Pressure, kPa; Liquid	Liquid	Standard Abbe refractometry	48
POMD	1 2	Boiling temperature at pressure P, K ; Liquid	Pressure, kPa; Liquid Mole fraction - 1; Liquid		Liquid Gas	Ebulliometric method (Recirculating still)	107
POMD	1 2	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid	Standard Abbe refractometry	66
POMD	1 2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	66
POMD	1 2	Refractive index (other wavelength) ; Liquid	Temperature, K; Liquid Mole fraction - 1; Liquid Wavelength, nm; Liquid	Pressure, kPa; Liquid	Liquid	Standard Abbe refractometry	528

Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Excess properties and isobaric (vapor + liquid) equilibrium at sub-atmospheric pressures of binary (1,2-propanediol + 1,3-propanediol) system: Measurement and modelling

Rane, N. V.[Nilesh Vijay], Kumari, A.[Alka], Soujanya, J., Satyavathi, B.

ABSTRACT