ABSTRACT

In this work, CO2 solubility in aqueous potassium lysinate solutions has been measured for the concentrations of (1.25 3.28) mol kg 1 and at temperatures of (313 343) K. The vapour-liquid equilibrium data were correlated using a Soft model and a semi-empirical (SE) model. The proposed models can match well with the experimental data with AAD within 20%. The heat of absorption for LysK was estimated as about (55 70) kJ mol 1 CO2 absorbed from the solubility data. The lower heat of absorption, compared with that of 30 mass% MEA, will be beneficial for the reduction of regeneration energy.

Compounds

#	Formula	Name
1	CO2	carbon dioxide
2	C6H13KN2O2	potassium L-lysinate
3	C2H7NO	2-aminoethan-1-ol
4	H2O	water

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	4	Vapor or sublimation pressure, kPa ; Liquid	Temperature, K; Liquid		Liquid Gas	Closed cell (Static) method	6
POMD	1 4 2	Molality, mol/kg - 1 ; Liquid	Molality, mol/kg - 2; Liquid Temperature, K; Liquid Pressure, kPa - 1; Gas		Liquid Gas	Titration	96
POMD	1 3 4	Molality, mol/kg - 1 ; Liquid	Pressure, kPa - 1; Gas	Temperature, K; Liquid Molality, mol/kg - 3; Liquid	Liquid Gas	Titration	9
POMD	4 2	Vapor or sublimation pressure, kPa ; Liquid	Temperature, K; Liquid Molality, mol/kg - 2; Liquid		Liquid Gas	Closed cell (Static) method	15

Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

CO2 solubility in aqueous potassium lysinate solutions at absorber conditions

Zhao, Y.[Yue], Shen, S.[Shufeng], Bian, Y.[Yangyang], Yang, Y.-n.[Ya-nan], Guosh, U.[Ujjal]

ABSTRACT