ABSTRACT

The density and viscosity of H2S-loaded aqueous 46.78 mass% methyldiethanolamine solution were experimentally measured accompanied with the solubility of H2S at temperatures (313.15, 328.15 and 343.15) K, pressures from vapor pressure of fresh solution up to 1.0 MPa and loadings up to 1.00 mol of H2S per 1 mol of amine. All experimental trials have been carried out using the new setup developed in our laboratory. It was observed that both density and viscosity of mixtures decrease by increasing temperature and density increase by increasing acid gas solubility (loading) by about 4.7%, whereas viscosity has a complicated behavior with H2S solubility. Viscosity decreases by increasing acid gas solubility (loading) at 313.15 K by about 20.6% and at 328.15 K by about 15.0%, but it is comparable at 343.15 K in terms of H2S solubility. Finally, the experimental density and viscosity data correlated using Modified Setchenow equation.

Compounds

#	Formula	Name
1	H2S	hydrogen sulfide
2	C5H13NO2	N-methyldiethanolamine
3	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	2 3 1	Mole fraction - 1 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Solvent: Molality, mol/kg - 2; Liquid	Liquid Gas	Volumetric Method	33
POMD	2 3 1	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid Mole fraction - 1; Liquid	Solvent: Molality, mol/kg - 2; Liquid	Liquid	Vibrating tube method	33
POMD	2 3 1	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid Mole fraction - 1; Liquid	Solvent: Molality, mol/kg - 2; Liquid	Liquid	Falling or rolling sphere viscometry	33
POMD	2 3	Mass density, kg/m3 ; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Molality, mol/kg - 2; Liquid	Liquid	Vibrating tube method	3
POMD	2 3	Viscosity, Pa*s ; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Molality, mol/kg - 2; Liquid	Liquid	Falling or rolling sphere viscometry	3
POMD	2 3	Vapor or sublimation pressure, kPa ; Liquid	Temperature, K; Liquid	Molality, mol/kg - 2; Liquid	Liquid Gas	Closed cell (Static) method	3

Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Measuring the density and viscosity of H2S-loaded aqueous methyldiethanolamine solution

Shokouhi, M.[Mohammad], Ahmadi, R.[Reza]

ABSTRACT