ABSTRACT

Comprehensive (p, .rho., T) measurements on propane, propylene, n-butane, and isobutane have been carried out in the homogenous gas and liquid phases and along the (vapour + liquid) coexistence curve. The results cover a temperature range from (95 to 340) K at pressures up to 12 MPa. The measurements were performed by using an accurate two-sinker densimeter based on the Archimedes ? buoyancy principle. The total uncertainty of the measurements in density is (0.01 to 0.02)% (level of confidence 95%), except for low gas densities. Values for the second and third virial coefficients have also been determined from the measurements in the homogeneous gas regions of the fluids. The experimental results have been compared with previous results of other experimentalists and with values calculated from current equations of state. Moreover, previously unpublished results of (p, .rho., T) measurements on propane in the temperature range from (340 to 520) K at pressures up to 30 MPa are listed in the appendix.

Compounds

#	Formula	Name
1	C3H8	propane
2	C3H6	propene
3	C4H10	butane
4	C4H10	2-methylpropane

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	24
POMD	1	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Liquid Gas	Buoyancy - hydrostatic balance with magnetic suspension - two sinkers	27
POMD	1	Mass density, kg/m3 ; Gas	Temperature, K; Gas	Gas Liquid	Buoyancy - hydrostatic balance with magnetic suspension - two sinkers	12
POMD	1	Mass density, kg/m3 ; Fluid (supercritical or subcritical phases)	Temperature, K; Fluid (supercritical or subcritical phases) Pressure, kPa; Fluid (supercritical or subcritical phases)	Fluid (supercritical or subcritical phases)	Buoyancy - hydrostatic balance with magnetic suspension - two sinkers	72
POMD	1	Mass density, kg/m3 ; Fluid (supercritical or subcritical phases)	Temperature, K; Fluid (supercritical or subcritical phases) Pressure, kPa; Fluid (supercritical or subcritical phases)	Fluid (supercritical or subcritical phases)	Buoyancy - hydrostatic balance with magnetic suspension - one sinker	120
POMD	1	Mass density, kg/m3 ; Fluid (supercritical or subcritical phases)	Temperature, K; Fluid (supercritical or subcritical phases) Pressure, kPa; Fluid (supercritical or subcritical phases)	Fluid (supercritical or subcritical phases)	Buoyancy - hydrostatic balance with magnetic suspension - one sinker	10
POMD	2	Vapor or sublimation pressure, kPa ; Liquid	Temperature, K; Liquid	Liquid Gas	Closed cell (Static) method	24
POMD	2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Liquid Gas	Buoyancy - hydrostatic balance with magnetic suspension - two sinkers	26
POMD	2	Mass density, kg/m3 ; Gas	Temperature, K; Gas	Gas Liquid	Buoyancy - hydrostatic balance with magnetic suspension - two sinkers	12
POMD	2	Mass density, kg/m3 ; Fluid (supercritical or subcritical phases)	Temperature, K; Fluid (supercritical or subcritical phases) Pressure, kPa; Fluid (supercritical or subcritical phases)	Fluid (supercritical or subcritical phases)	Buoyancy - hydrostatic balance with magnetic suspension - two sinkers	78
POMD	3	Vapor or sublimation pressure, kPa ; Liquid	Temperature, K; Liquid	Liquid Gas	Closed cell (Static) method	23
POMD	3	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Liquid Gas	Buoyancy - hydrostatic balance with magnetic suspension - two sinkers	23
POMD	3	Mass density, kg/m3 ; Gas	Temperature, K; Gas	Gas Liquid	Buoyancy - hydrostatic balance with magnetic suspension - two sinkers	9
POMD	3	Mass density, kg/m3 ; Fluid (supercritical or subcritical phases)	Temperature, K; Fluid (supercritical or subcritical phases) Pressure, kPa; Fluid (supercritical or subcritical phases)	Fluid (supercritical or subcritical phases)	Buoyancy - hydrostatic balance with magnetic suspension - two sinkers	66
POMD	4	Vapor or sublimation pressure, kPa ; Liquid	Temperature, K; Liquid	Liquid Gas	Closed cell (Static) method	23
POMD	4	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Liquid Gas	Buoyancy - hydrostatic balance with magnetic suspension - two sinkers	24
POMD	4	Mass density, kg/m3 ; Gas	Temperature, K; Gas	Gas Liquid	Buoyancy - hydrostatic balance with magnetic suspension - two sinkers	9
POMD	4	Mass density, kg/m3 ; Fluid (supercritical or subcritical phases)	Temperature, K; Fluid (supercritical or subcritical phases) Pressure, kPa; Fluid (supercritical or subcritical phases)	Fluid (supercritical or subcritical phases)	Buoyancy - hydrostatic balance with magnetic suspension - two sinkers	82

Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Measurement of the (p,.rho.,T) relation of propane, propylene, n-butane, and isobutane in the temperature range from (95 to 340) K at pressures up to 12 MPa using an accurate two-sinker densimeter

Glos, S.[Stefan], Kleinrahm, R.[Reiner], Wagner, W.[Wolfgang]

ABSTRACT