RT info:eu-repo/semantics/article
T1 Solubility measurements of carbon dioxide and nitrous oxide in an aqueous mixture of 2-dimethylaminoethanol and N-methyl-1,3-propanediamine
A1 Arroyave Roa, Juan Diego
A1 Moreau Ortega, Alejandro
A1 Paredes Mendez, Xavier
A1 Velez Jaramillo, Jhon Fredy
A1 Martín Trusler, J.P.
A1 Martín González, María del Carmen
K1 CO2 capture
K1 Amine blends
K1 DMAE
K1 MAPA
K1 Vapour-liquid equilibrium
K1 Solubility
K1 33 Ciencias Tecnológicas
AB Aqueous monoethanolamine (MEA) is a mature post-combustion CO2 capture technology, but it faces significant drawbacks including corrosivity, high regeneration energy (∼4 GJ/t-CO2), and reactivity with contaminants. This study investigates an aqueous blend of 2-Dimethylaminoethanol (DMAE, 30% wt.) and N-Methyl-1,3-propanediamine (MAPA, 10% wt.) as an alternative solvent to capture CO2. Given the scarcity of Vapour-Liquid Equilibrium (VLE) data for such amine blends, this research aims to expand the thermodynamic understanding of this specific aqueous DMAE + MAPA system. We thoroughly investigate its VLE with CO2 and N2O across temperatures between (313.15–393.15) K. The physical solubility of CO2 was determined using the N2O/CO2 analogy. N2O solubility measurements were conducted in a monobloc equilibrium cell from 1 to 5 MPa. The expanded relative uncertainty of the N2O solubility, expressed in molality, was estimated to be 0.8% (k = 2). Henry's constants were derived using Krichevsky-Ilinskaya analysis and CO2 solubility was determined using a static-isochoric Van Ness-type apparatus over 313.15–363.15 K and up to 7 MPa with a relative uncertainty of ur(αexp) = (0.3–5) %. Finally, speciation profiles and the heat of CO2 absorption were predicted using established thermodynamic models optimized for this system.
PB Elsevier
SN 0021-9614
YR 2026
FD 2026
LK https://uvadoc.uva.es/handle/10324/83945
UL https://uvadoc.uva.es/handle/10324/83945
LA eng
NO The Journal of Chemical Thermodynamics, 2026, vol. 217, p. 107675
NO Producción Científica
DS UVaDOC
RD 08-abr-2026