ABSTRACT

The solubilities of two fatty acids, namely hexadecanoic acid (palmitic acid) and octadecanoic acid (stearic acid) in supercritical carbon dioxide (SCCO2), were determined at T = (328 and 338) K from 12.8 MPa to 22.6 MPa. Three models, namely a thermodynamic model based on the Peng Robinson equation of state with Kwak and Mansoori mixing rules, a model based on dilute solution theory proposed by Mendez-Santiago and Teja and a new reformulated Chrastil equation model, were used to correlate the solubilities. In all the models, the correlation constants are temperature independent. All the models successfully correlated the experimental results for the solubilities of hexadecanoic acid within 3%.

Compounds

#	Formula	Name
1	CO2	carbon dioxide
2	C16H32O2	hexadecanoic acid
3	C18H36O2	octadecanoic acid

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 1	Mole fraction - 2 ; 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 - 2	Trap and weigh eluted solutes	15
POMD	3 1	Mole fraction - 3 ; 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	Trap and weigh eluted solutes	20

Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Solubilities of palmitic and stearic fatty acids in supercritical carbon dioxide

Garlapati, C.[Chandrasekhar], Madras, G.[Giridhar]

ABSTRACT