ABSTRACT

The present study has focused on the experimental measurements of the molar heat capacities of four aqueous physical solvents of importance in natural gas sweetening: (1) tetramethylene sulfone (sulfolane), (2) 4-formylmorpholine (NFM), (3) 1-methyl-2-pyrrolidinone (NMP), and (4) triethylene glycol dimethyl ether (TEGDME). The measurements of the molar heat capacities were carried out in the temperature range of (303.15 to 353.15) K and for the entire range of mole fractions. Fractional deviations of the measured molar heat capacities from literature data were less than 1 %, and at worst 2 %. Molar excess heat capacities were calculated from the measurements and correlated as a function of mole fraction and temperature employing the Redlich-Kister equation. The excess partial molar quantities (Ci o - Ci*) were calculated by extrapolating the reduced excess heat capacity (Cp E/x1x2) function at x1 ) 0 and x1 ) 1.

Compounds

#	Formula	Name
1	C8H18O4	2,5,8,11-tetraoxadodecane
2	C5H9NO	N-methylpyrrolidone
3	C5H9NO2	N-formylmorpholine
4	C4H8O2S	sulfolane
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	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Large sample (1 g) DSC	11
POMD	2	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Large sample (1 g) DSC	11
POMD	3	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Large sample (1 g) DSC	11
POMD	4	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Large sample (1 g) DSC	11
POMD	4 5	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid Mole fraction - 4; Liquid	Pressure, kPa; Liquid	Liquid	Large sample (1 g) DSC	110
POMD	3 5	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid Mole fraction - 3; Liquid	Pressure, kPa; Liquid	Liquid	Large sample (1 g) DSC	110
POMD	1 5	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid	Large sample (1 g) DSC	110
POMD	2 5	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid Mole fraction - 2; Liquid	Pressure, kPa; Liquid	Liquid	Large sample (1 g) DSC	110

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

Molar Heat Capacity of Aqueous Sulfolane, 4-Formylmorpholine, 1-Methyl-2-pyrrolidinone, and Triethylene Glycol Dimethyl Ether Solutions from (303.15 to 353.15) K

Mundhwa, M.[Mayur], Elmahmudi, S.[Salaheddin], Maham, Y.[Yadi], Henni, A.[Amr]

ABSTRACT