ABSTRACT

This paper presents measurements of speed of sound, density, viscosity and compressibility in liquid ethyl laurate and methyl laurate along isotherms ranging from (293.15 to 353.15) K at pressures that cover the pressure range of common rail direct fuel injection systems (up to 200 MPa). Measurements have been carried out by two different acoustic wave sensors assembled within a single device. The former works in the longitudinal mode to determine speed of sound whereas the latter acts in the thickness shear mode in order to measure the density viscosity product. The measurement principle of sound speed is based on pulse-echo technique whereas density is evaluated by integration of speed of sound measurement using Newton Laplace equation. Viscosity is determined from measurement of the resonance behavior of the thickness shear wave sensor. Finally both isothermal and isentropic compressibilities are obtained from density and speed of sound data.

Compounds

#	Formula	Name
1	C13H26O2	methyl dodecanoate
2	C14H28O2	ethyl dodecanoate

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	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Frequency, MHz; Liquid	Liquid	Pulse-echo method	55
POMD	1	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	7
POMD	1	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Small sample (50 mg) DSC	10
POMD	1	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Capillary tube (Ostwald; Ubbelohde) method	4
POMD	1	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	quartz crystal resonator	50
POMD	2	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Frequency, MHz; Liquid	Liquid	Pulse-echo method	58
POMD	2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	7
POMD	2	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Small sample (50 mg) DSC	10
POMD	2	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Capillary tube (Ostwald; Ubbelohde) method	4
POMD	2	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	quartz crystal resonator	54

Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Measurement of speed of sound, density compressibility and viscosity in liquid methyl laurate and ethyl laurate up to 200 MPa by using acoustic wave sensors

Habrioux, Matthieu, Nasri, Djamel, Daridon, Jean Luc

ABSTRACT