ABSTRACT

The molar heat capacity (CP) of a potential solvent system for CO2 absorption, containing water, glycol and n-[tris(hydroxymethyl)methyl-3-amino]propanesulfonic acid (TAPS), was measured at 303.15 K to 353.15 K and different concentrations (40 mass % glycol + 4 to 16 mass % TAPS + H2O). The glycols used were diethylene glycol (DEG), triethylene glycol (TEG), tetraethylene glycol (T4EG), propylene glycol (PG), dipropylene glycol (DPG) and tripropylene glycol (TPG). An extended Redlich-Kister-type equation was used to correlate heat capacity with concentration and *Manuscript Click here to view linked References 2 temperature; the average absolute deviation (AAD) of the 198 data points from the corresponding values predicted by the correlation was 0.04 %. The new set heat capacity data or the correlation, reported for the ternary system considered, can be used with high degree of accuracy in process design calculations for systems that will utilize these solvent systems.

Compounds

#	Formula	Name
1	C4H10O3	diethylene glycol
2	H2O	water
3	C7H17NO6S	3-[tris(hydroxymethyl)methylamino]-1-propanesulfonic acid
4	C6H14O4	triethylene glycol
5	C8H18O5	tetraethylene glycol
6	C3H8O2	1,2-propanediol
7	C6H14O3	4-oxa-1,7-heptanediol
8	C9H20O4	2-[2-(2-hydroxypropoxy)propoxy]-1-propanol

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 2 3	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid Mass fraction - 3; Liquid	Mass fraction - 1; Liquid Pressure, kPa; Liquid	Liquid	Small sample (50 mg) DSC	33
POMD	4 2 3	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid Mass fraction - 3; Liquid	Mass fraction - 4; Liquid Pressure, kPa; Liquid	Liquid	Small sample (50 mg) DSC	33
POMD	5 2 3	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid Mass fraction - 3; Liquid	Mass fraction - 5; Liquid Pressure, kPa; Liquid	Liquid	Small sample (50 mg) DSC	33
POMD	6 2 3	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid Mass fraction - 3; Liquid	Mass fraction - 6; Liquid Pressure, kPa; Liquid	Liquid	Small sample (50 mg) DSC	33
POMD	2 7 3	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid Mass fraction - 3; Liquid	Mass fraction - 2; Liquid Pressure, kPa; Liquid	Liquid	Small sample (50 mg) DSC	33
POMD	2 3 8	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid Mass fraction - 3; Liquid	Mass fraction - 2; Liquid Pressure, kPa; Liquid	Liquid	Small sample (50 mg) DSC	33

Thermodynamics Research Center / ThermoML | Thermochimica Acta

Molar heat capacity of several aqueous solutions of n-[tris(hydroxymethyl)methyl-3-amino]- propanesulfonic acid (TAPS) + glycol

Lu, Y.-C.[Yu-Chyi], Caparanga, A. R.[Alvin R.], Leron, R. B.[Rhoda B.], Li, M. -H.[Meng-Hui]

ABSTRACT