ABSTRACT

In order to study the influence of amine structure on absorption of carbon dioxide, enthalpies of solution of CO2 in 2.50 mol * L-1 aqueous solutions of 2-amino-2-hydroxymethyl-1,3-propanediol (THAM), 2-[2-(dimethyl-amino)ethoxy] ethanol (DMAEOE), and 3-dimethyl-amino-1-propanol (DMAP) were measured. The enthalpies of solution are determined as function of gas loading charge (moles of CO2/mole of amine), at temperatures (313.15 and 353.15) K, and pressures range from (0.5 to 2) MPa. Measurements were carried out using a flow calorimetric technique. CO2 solubilities in the aqueous solutions of amine are derived from calorimetric data. Molar volumes of aqueous amine solutions required to handle calorimetric data were determined at 303.15 K using a vibrating tube densimeter. Experimental enthalpies of solution are discussed on the basis of amines alkalinity.

Compounds

#	Formula	Name
1	C4H11NO3	2-amino-2-(hydroxymethyl)-1,3-propanediol
2	C6H15NO2	2-(2-dimethylaminoethoxy)ethanol
3	C5H13NO	3-dimethylamino-1-propanol
4	CO2	carbon dioxide
5	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	1 4 5	Vapor or sublimation pressure, kPa ; Liquid	Temperature, K; Liquid Amount concentration (molarity), mol/dm3 - 4; Liquid	Amount concentration (molarity), mol/dm3 - 1; Liquid	Liquid Gas	Derived from calorimetric data	5
POMD	1 4 5	Molar enthalpy of solution, kJ/mol ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid Amount concentration (molarity), mol/dm3 - 4; Liquid	Amount concentration (molarity), mol/dm3 - 1; Liquid	Liquid	Calvet calorimetry	71
POMD	4 2 5	Vapor or sublimation pressure, kPa ; Liquid	Temperature, K; Liquid Amount concentration (molarity), mol/dm3 - 4; Liquid	Amount concentration (molarity), mol/dm3 - 2; Liquid	Liquid Gas	Derived from calorimetric data	6
POMD	4 2 5	Molar enthalpy of solution, kJ/mol ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid Amount concentration (molarity), mol/dm3 - 4; Liquid	Amount concentration (molarity), mol/dm3 - 2; Liquid	Liquid	Calvet calorimetry	102
POMD	4 3 5	Vapor or sublimation pressure, kPa ; Liquid	Temperature, K; Liquid Amount concentration (molarity), mol/dm3 - 4; Liquid	Amount concentration (molarity), mol/dm3 - 3; Liquid	Liquid Gas	Derived from calorimetric data	6
POMD	4 3 5	Molar enthalpy of solution, kJ/mol ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid Amount concentration (molarity), mol/dm3 - 4; Liquid	Amount concentration (molarity), mol/dm3 - 3; Liquid	Liquid	Calvet calorimetry	96

Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Enthalpy of absorption and limit of solubility of CO2 in aqueous solutions of 2-amino-2-hydroxymethyl-1,3-propanediol, 2-[2-(dimethyl-amino)ethoxy] ethanol, and 3-dimethyl-amino-1-propanol at T = (313.15 and 353.15) K and pressures up to 2 MPa

Rodier, L.[Laurence], Ballerat-Busserolles, K.[Karine], Coxam, J. -Y.[Jean-Yves]

ABSTRACT