ABSTRACT

Isobaric (vapour + liquid) equilibrium measurements have been reported for the binary mixture of (1-pentanol + propionic acid) at (53.3 and 91.3) kPa. Liquid phase activity coefficients were calculated from the equilibrium data. The thermodynamic consistency of the experimental results was checked using the area test and direct test methods. According to these criteria, the measured (vapour + liquid) equilibrium results were found to be consistent thermodynamically. The obtained results showed a maximum boiling temperature azeotrope at both pressures studied. The measured equilibrium results were satisfactorily correlated by the models of Wilson, UNIQUAC, and NRTL activity coefficients. The results obtained indicate that the performance of the NRTL model is superior to the Wilson and UNIQUAC models for correlating the measured isobaric (vapour + liquid) equilibrium data.

Compounds

#	Formula	Name
1	C5H12O	pentan-1-ol
2	C3H6O2	propanoic acid

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)	10
POMD	2	Vapor or sublimation pressure, kPa ; Liquid	Temperature, K; Liquid		Liquid Gas	Ebulliometric method (Recirculating still)	12
POMD	1 2	Refractive index (Na D-line) ; Liquid	Mole fraction - 1; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Standard Abbe refractometry	15
POMD	1 2	Azeotropic composition: mole fraction - 1 ; Liquid	Temperature, K; Liquid		Liquid Gas	By X=Y	2
POMD	1 2	Azeotropic composition: mole fraction - 1 ; Liquid	Pressure, kPa; Liquid		Liquid Gas	By X=Y	2
POMD	1 2	Boiling temperature at pressure P, K ; Liquid	Mole fraction - 1; Liquid Pressure, kPa; Liquid		Liquid Gas	Ebulliometric method (Recirculating still)	50
POMD	1 2	Mole fraction - 1 ; Gas	Mole fraction - 1; Liquid Pressure, kPa; Gas		Gas Liquid	Index of refraction calibration data	50

Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Isobaric (vapour + liquid) equilibria for the (1-pentanol + propionic acid) binary mixture at (53.3 and 91.3) kPa

Mohsen-Nia, M., Memarzadeh, M. R.

ABSTRACT