ABSTRACT

Isothermal VLE for the (R-23 + n-propane) system was measured using a static-analytic apparatus at temperatures between T = (293.18 and 353.15) K. The critical loci for the systems {R-23 + (n-propane or n-hexane)} and (R-116 + n-propane) were measured using a critical point determination apparatus. The method of Ungerer et al. was used to extrapolate the isothermal VLE data to the isothermal critical locus. These extrapolated critical loci were compared with experimental data. The Redlich-Kister type correlations were used to correlate the critical loci of the systems. A critical locus curve for the (R-23 + n-hexane) system which was calculated by the method of Heidemann and Khalil was compared with the experimental critical loci. The systems were classified according to the van Konynenburg and Scott classification system.

Compounds

#	Formula	Name
1	CHF3	trifluoromethane
2	C2F6	hexafluoroethane
3	C3H8	propane
4	C6H14	hexane

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	Phase	Method	#Points
POMD	1	Vapor or sublimation pressure, kPa ; Liquid	Temperature, K; Liquid	Liquid Gas	Closed cell (Static) method	2
POMD	3	Vapor or sublimation pressure, kPa ; Liquid	Temperature, K; Liquid	Liquid Gas	Closed cell (Static) method	5
POMD	3 1	Vapor or sublimation pressure, kPa ; Liquid	Mole fraction - 1; Liquid Temperature, K; Liquid	Liquid Gas	Closed cell (Static) method	73
POMD	3 1	Mole fraction - 1 ; Gas	Mole fraction - 1; Liquid Temperature, K; Liquid	Gas Liquid	Chromatography	73
POMD	3 1	Critical temperature, K ; Liquid	Mole fraction - 1; Liquid	Liquid Gas	Visual observation in an unstirred cell	8
POMD	3 1	Critical pressure, kPa ; Liquid	Mole fraction - 1; Liquid	Liquid Gas	Direct measurement	8
POMD	3 1	Vapor or sublimation pressure, kPa ; Liquid	Mole fraction - 1; Gas Temperature, K; Liquid	Liquid Gas	Closed cell (Static) method	5
POMD	1 4	Critical temperature, K ; Liquid	Mole fraction - 1; Liquid	Liquid Gas	Visual observation in an unstirred cell	8
POMD	1 4	Critical pressure, kPa ; Liquid	Mole fraction - 1; Liquid	Liquid Gas	Direct measurement	8
POMD	3 2	Critical temperature, K ; Liquid	Mole fraction - 2; Liquid	Liquid Gas	Visual observation in an unstirred cell	6
POMD	3 2	Critical pressure, kPa ; Liquid	Mole fraction - 2; Liquid	Liquid Gas	Direct measurement	6

Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Experimental determination of the critical loci for R-23 + (npropane or n-hexane) and R-116 + n-propane binary mixtures

Williams-Wynn, M. D.[Mark D.], Abbadi, J.E.[Jamal El], Valtz, A.[Alain], Kovacs, E.[Elodie], Houriez, C.[Celine], Naidoo, P.[Paramespri], Coquelet, C.[Christophe], Ramjugernath, D.[Deresh]

ABSTRACT