ABSTRACT

Aqueous solutions of N,N-dimethyl-dipropylene-diamino-triacetonediamine (EvA34) are promising solvents for CO2 capture. Therefore, in the present work, a comprehensive experimental study was carried out to determine data on physicochemical properties of EvA34 and its mixtures with H2O and CO2. The liquid density and the dynamic viscosity were studied for pure EvA34, as well as for unloaded and CO2-loaded aqueous solutions of EvA34. The liquid heat capacity was studied for pure EvA34 and unloaded aqueous solutions of EvA34. Furthermore, data on the vapor pressure of pure EvA34 was recorded. The pH value was measured for unloaded and CO2-loaded aqueous solutions of EvA34, and the dissociation constants of EvA34 were determined from titration curves. Moreover, data on the solubility of CO2 in aqueous solutions of EvA34 and data on the CO2-containing species in the liquid phase of these solutions were recorded. Most of the new data were taken at temperatures between 293 and 393 K. The mass fraction of EvA34 in the unloaded aqueous solutions was either w~EvA340 = 0.1 g/g or w~EvA340 = 0.4 g/g. The CO2 loading was up to a~CO2 = 6.2 mol/mol. The new data were compared to corresponding data of two standard amines that are used for CO2 capture: monoethanolamine (MEA) and a blend of methyl-diethanolamine and piperazine (MDEA/PZ). The comparison revealed that EvA34 combines favorable properties of MEA and MDEA/PZ in one molecule.

Compounds

#	Formula	Name
1	C17H38N4	N,N-dimethyl-dipropylene-diamino-triacetonediamine [EvA34]
2	H2O	water
3	CO2	carbon dioxide
4	C5H13NO2	N-methyldiethanolamine
5	C4H10N2	piperazine

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	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	DSC	6
POMD	1	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	8
POMD	1	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Concentric cylinders viscometry	8
POMD	1	Vapor or sublimation pressure, kPa ; Liquid	Temperature, K; Liquid		Liquid Gas	Ebulliometric method (Recirculating still)	4
POMD	2	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	DSC	6
POMD	2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	8
POMD	2	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Concentric cylinders viscometry	8
POMD	1 2 3	Partial pressure, kPa - 3 ; Gas	Temperature, K; Gas Molality, mol/kg - 1; Liquid Molality, mol/kg - 3; Liquid		Gas Liquid	headspace gas chromatography	51
POMD	1 2 3	Vapor or sublimation pressure, kPa ; Gas	Temperature, K; Gas Molality, mol/kg - 1; Liquid Molality, mol/kg - 3; Liquid		Gas Liquid	Closed cell (Static) method	51
POMD	1 2 3	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 1; Liquid Molality, mol/kg - 3; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	84
POMD	1 2 3	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid Molality, mol/kg - 1; Liquid Molality, mol/kg - 3; Liquid	Pressure, kPa; Liquid	Liquid	Concentric cylinders viscometry	84
POMD	1 2	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid	Liquid	DSC	42
POMD	1 2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	110
POMD	1 2	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid	Liquid	Concentric cylinders viscometry	110
POMD	4 5	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Mass fraction - 4; Liquid Pressure, kPa; Liquid	Liquid	Vibrating tube method	8
POMD	4 5	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid	Mass fraction - 4; Liquid Pressure, kPa; Liquid	Liquid	Concentric cylinders viscometry	8
POMD	4 5 2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Molality, mol/kg - 4; Liquid Molality, mol/kg - 5; Liquid Pressure, kPa; Liquid	Liquid	Vibrating tube method	7
POMD	4 5 2	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid	Molality, mol/kg - 4; Liquid Molality, mol/kg - 5; Liquid Pressure, kPa; Liquid	Liquid	Concentric cylinders viscometry	7

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

Physicochemical Properties of the System N,N-Dimethyl-dipropylene-diamino-triacetonediamine (EvA34), Water, and Carbon Dioxide for Reactive Absorption

Kessler, E.[Elmar], Ninni, L.[Luciana], Breug-Nissen, T.[Tanja], Willy, B.[Benjamin], Schneider, R.[Rolf], Irfan, M.[Muhammad], Rolker, J.[Jrn], von Harbou, E.[Erik], Hasse, H.[Hans]

ABSTRACT