In this work, a physicochemical absorbent was proposed for CO2 capture, which consists of dibutyl ether as physical solvent, N-methylethanolamine (NMEA) as chemical additive, and ethanol as dissolvent. The vapor liquid equilibrium behavior of this CO2 + physicochemical absorbent system was measured using an isothermal synthetic apparatus. The solubility data of CO2 in ethanol at 313.15 K were measured and compared with literature data to verify the validity of this method. Then, the CO2 solubility data of above system with varying NMEA mass fractions of 15 %, 25 %, and 50 % were, respectively, measured at 298.15 K. It shows that the CO2 solubility increases when NMEA mass fraction goes up. The CO2 solubility data in the absorbent with 25 % NMEA mass fraction were measured at a temperature range from 298.15 K to 328.15 K with the interval of 10 K and at a pressure range from 0 MPa to 3 MPa. The result shows that CO2 turns out to be more soluble in the physicochemical absorbents than in dibutyl ether at the same conditions of temperature and pressure.
Compounds
#
Formula
Name
1
C8H18O
dibutyl ether
2
C3H9NO
2-(methylamino)ethanol
3
C2H6O
ethanol
4
CO2
carbon dioxide
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.