A mixture of 2-(2-aminoethylamine)ethanol (AEEA) with benzyl alcohol (BP) as absorbent was developed to reduce energy consumption in an amine-based CO2 capture process. The solubility of CO2 in the AEEA + BP solution was compared with AEEA + diethylene glycol (DEG), AEEA + triethylene glycol (TEG), and AEEA + H2O. The CO2 loading (mol CO2/kg amine) at the same CO2 partial pressure was in the order AEEA + H2O greater than AEEA + BP greater than AEEA + TEG greater than AEEA + DEG, and CO2 loading of all these solutions increased with increasing vapor pressure of CO2. Besides, the CO2 loading in AEEA + BP solution significantly decreased with increasing reaction temperature. The desorption rate of AEEA + BP solution was about 1.3 times faster than that of aqueous AEEA solution at the same desorption temperature, and AEEA + BP solution needed 30% time less than AEEA + H2O solution to reach reaction end point. The AEEA + BP solution showed stable repeatability in four cycles of absorption desorption tests.
Compounds
#
Formula
Name
1
C7H8O
benzenemethanol
2
C4H10O3
diethylene glycol
3
C6H14O4
triethylene glycol
4
C4H12N2O
N-(2-aminoethyl)ethanolamine
5
CO2
carbon dioxide
6
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.