ABSTRACT

Aqueous amino acid salt (AAS) solutions could be attractive absorbents for CO2 removal from flue gases. Density, viscosity, and solubility of N2O in aqueous potassium salts of lysine, histidine, and arginine were measured over the temperature range from (293 to 353) K and molality concentration range from (0.26 to 3.6) mol*kg 1. Experimental results were correlated well with empirical correlations. The ion specific parameters (hAA ), based on the Weisenberger and Schumpe model, were fitted using the solubility data of N2O in the aforementioned AAS systems, valid up to 328 K. The models using temperature dependence of hAA predict well within 2.5% AAD. The physical solubility of CO2 in the aqueous AAS solutions was also estimated.

Compounds

#	Formula	Name
1	C6H13KN2O2	potassium L-lysinate
2	C6H8KN3O2	potassium L-histidinate
3	C6H13KN4O2	potassium L-argininate
4	H2O	water
5	N2O	nitrous oxide

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 1	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 1; Liquid Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	90
POMD	4 1	Viscosity, Pa*s ; Liquid	Molality, mol/kg - 1; Liquid Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Falling or rolling sphere viscometry	90
POMD	4 2	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 2; Liquid Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	78
POMD	4 2	Viscosity, Pa*s ; Liquid	Molality, mol/kg - 2; Liquid Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Falling or rolling sphere viscometry	78
POMD	4 3	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 3; Liquid Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	52
POMD	4 3	Viscosity, Pa*s ; Liquid	Amount concentration (molarity), mol/dm3 - 3; Liquid Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Falling or rolling sphere viscometry	52
POMD	4 5 1	Molality, mol/kg - 5 ; Liquid	Solvent: Molality, mol/kg - 1; Liquid Temperature, K; Liquid Pressure, kPa - 5; Gas		Liquid Gas	phase equilibration	42
POMD	4 5 2	Molality, mol/kg - 5 ; Liquid	Solvent: Molality, mol/kg - 2; Liquid Temperature, K; Liquid Pressure, kPa - 5; Gas		Liquid Gas	phase equilibration	26
POMD	4 5 3	Molality, mol/kg - 5 ; Liquid	Solvent: Molality, mol/kg - 3; Liquid Temperature, K; Liquid Pressure, kPa - 5; Gas		Liquid Gas	phase equilibration	28

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

Physicochemical Properties of Aqueous Potassium Salts of Basic Amino Acids as Absorbents for CO2 Capture

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

ABSTRACT