ABSTRACT

A static method coupled with gravimetric analysis was used to measure the solubility of L-proline in subcritical 1,1,1,2-tetrafluoroethane (HFC-134a) and supercritical CO2 (scCO2). The solubility of L-proline is much higher in HFC-134a fluid than in scCO2. The solubilities of L-proline in HFC-134a and scCO2 are affected by temperature and pressure. The solubilities increase with increasing temperature and pressure for both scCO2 and HFC-134a solvents. The densities of scCO2 and subcritical HFC-134a were calculated using the Peng-Robinson (P-R) equation. Experimentally determined density data were used to assess the accuracy of the P-R equation.

Compounds

#	Formula	Name
1	CO2	carbon dioxide
2	C2H2F4	1,1,1,2-tetrafluoroethane
3	C5H9NO2	L-proline

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	Mass density, kg/m3 ; Fluid (supercritical or subcritical phases)	Pressure, kPa; Fluid (supercritical or subcritical phases) Temperature, K; Fluid (supercritical or subcritical phases)		Fluid (supercritical or subcritical phases)	Vibrating tube method	11
POMD	2	Mass density, kg/m3 ; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid		Liquid	Vibrating tube method	10
POMD	1 3	Mass concentration, 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) Crystal - 3	gravimetric analysis	3
POMD	3 2	Mass concentration, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 3	gravimetric analysis	3

Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

Solubilities of L-Proline in Subcritical HFC-134a and Supercritical CO2 Fluids

Liu, L.[Ling], Li, Z.[Zhen], Liu, Z.-W.[Zhong-Wen], Liu, Z.-T.[Zhao-Tie]

ABSTRACT