ABSTRACT

Methyldiethanolamine (MDEA) is a widely used chemical in the natural gas processing industry as a solvent for CO2 and H2S capture and as a basic compound for pH stabilization corrosion control. During pH stabilization corrosion control, the removal of MDEA during the MEG regeneration process may occur under vacuum conditions during reclamation where the removal of salt cations is performed. Isobaric vapor-liquid equilibrium data for the binary MEG-MDEA system is presented at (20, 10 and 5) kPa and water-MDEA system at (40, 20, 10) Mole Fraction (MDEA) - x2, y2 kPa to simulate its behavior during MEG reclamation under vacuum. Vapor and liquid equilibrium concentrations of MDEA were measured using a combination of ion chromatography and refractive index. The generated experimental VLE data were correlated to the UNIQUAC, NRTL and Wilson activity coefficient models and the respective binary parameters regressed. T/K Submitted to Journal of Chemical & Engineering Data

Compounds

#	Formula	Name
1	C2H6O2	1,2-ethanediol
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	1	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Standard Abbe refractometry	1
POMD	1	Vapor or sublimation pressure, kPa ; Liquid	Temperature, K; Liquid		Liquid Gas	Ebulliometric method (Recirculating still)	3
POMD	1	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Standard Abbe refractometry	1
POMD	2	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Standard Abbe refractometry	1
POMD	2	Vapor or sublimation pressure, kPa ; Liquid	Temperature, K; Liquid		Liquid Gas	Ebulliometric method (Recirculating still)	6
POMD	2	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Standard Abbe refractometry	1
POMD	3	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Standard Abbe refractometry	1
POMD	3	Vapor or sublimation pressure, kPa ; Liquid	Temperature, K; Liquid		Liquid Gas	Ebulliometric method (Recirculating still)	3
POMD	3	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Standard Abbe refractometry	1
POMD	3 2	Mole fraction - 2 ; Gas	Mole fraction - 2; Liquid Pressure, kPa; Liquid		Gas Liquid	OTHER	39
POMD	3 2	Boiling temperature at pressure P, K ; Liquid	Mole fraction - 2; Liquid Pressure, kPa; Liquid		Liquid Gas	Ebulliometric method (Recirculating still)	39
POMD	3 2	Refractive index (Na D-line) ; Liquid	Mole fraction - 2; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Standard Abbe refractometry	14
POMD	1 2	Mole fraction - 2 ; Gas	Mole fraction - 2; Liquid Pressure, kPa; Liquid		Gas Liquid	OTHER	37
POMD	1 2	Boiling temperature at pressure P, K ; Liquid	Mole fraction - 2; Liquid Pressure, kPa; Liquid		Liquid Gas	Ebulliometric method (Recirculating still)	37
POMD	1 2	Refractive index (Na D-line) ; Liquid	Mole fraction - 2; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Standard Abbe refractometry	12

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

Experimental Vapor-Liquid Equilibrium Data for Binary Mixtures of Methyldiethanolamine in Water and Ethylene Glycol under Vacuum

Soames, Adam, Helal, Ammar Al, Iglauer, Stefan, Barifcani, Ahmed, Gubner, Rolf

ABSTRACT