ABSTRACT

Reported in this work are phase equilibrium data at high pressures for the binary and ternary systems formed by {propane + N,N-dimethylformamide (DMF) + methanol}. Phase equilibrium measurements were performed in a high-pressure, variable-volume view cell, following the static synthetic method for obtaining the experimental bubble and dew points transition data over the temperature range of (363 to 393) K, pressures up to 11.5 MPa and overall mole fraction of the lighter component varying from 0.1 to 0.995. For the systems investigated, vapour-liquid (VLE), liquid-liquid (LLE) and vapour-liquid-liquid (VLLE) phase transitions were visually recorded. Results show that the systems investigated present UCST (upper critical solution temperature) phase transition curves with an UCEP (upper critical end point) at a temperature higher than the propane critical temperature. The experimental data were modelled using the Peng-Robinson equation of state with the Wong-Sandler and the classical quadratic mixing rules, affording a satisfactory representation of the experimental data.

Compounds

#	Formula	Name
1	CH4O	methanol
2	C3H7NO	dimethylformamide
3	C3H8	propane

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	Vapor or sublimation pressure, kPa ; Liquid mixture 1	Mole fraction - 3; Liquid mixture 1		Liquid mixture 1 Liquid mixture 2 Gas	Closed cell (Static) method	21
POMD	2 3	Vapor or sublimation pressure, kPa ; Liquid mixture 1	Temperature, K; Liquid mixture 1		Liquid mixture 1 Liquid mixture 2 Gas	Closed cell (Static) method	21
POMD	2 3	Vapor or sublimation pressure, kPa ; Gas	Temperature, K; Gas	Mole fraction - 3; Gas	Gas Liquid	Closed cell (Static) method	2
POMD	2 3	Vapor or sublimation pressure, kPa ; Liquid mixture 1	Temperature, K; Liquid mixture 1 Mole fraction - 3; Liquid mixture 1		Liquid mixture 1 Liquid mixture 2	Closed cell (Static) method	28
POMD	2 3	Vapor or sublimation pressure, kPa ; Liquid	Temperature, K; Liquid Mole fraction - 3; Liquid		Liquid Gas	Closed cell (Static) method	15
POMD	1 2 3	Vapor or sublimation pressure, kPa ; Liquid mixture 1	Solvent: Amount ratio of component to other component of binary solvent - 2; Liquid mixture 1 Temperature, K; Liquid mixture 1		Liquid mixture 1 Liquid mixture 2 Gas	Closed cell (Static) method	30
POMD	1 2 3	Vapor or sublimation pressure, kPa ; Liquid mixture 1	Solvent: Amount ratio of component to other component of binary solvent - 2; Liquid mixture 1 Mole fraction - 3; Liquid mixture 1		Liquid mixture 1 Liquid mixture 2 Gas	Closed cell (Static) method	30
POMD	1 2 3	Vapor or sublimation pressure, kPa ; Liquid mixture 1	Solvent: Amount ratio of component to other component of binary solvent - 2; Liquid mixture 1 Temperature, K; Liquid mixture 1 Mole fraction - 3; Liquid mixture 1		Liquid mixture 1 Liquid mixture 2	Closed cell (Static) method	40
POMD	1 2 3	Vapor or sublimation pressure, kPa ; Liquid	Solvent: Amount ratio of component to other component of binary solvent - 2; Liquid Temperature, K; Liquid Mole fraction - 3; Liquid		Liquid Gas	Closed cell (Static) method	16

Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Phase equilibrium data and thermodynamic modelling of the system (propane + DMF + methanol) at high pressures

Charin, R. M.[Rafael M.], Corazza, M. L.[Marcos L.], Ndiaye, P. M.[Papa M.], Rigo, A. A.[Aline A.], Mazutti, M. A.[Marcio A.], Oliveira, J. V.[J Vladimir]

ABSTRACT