Estimation of the CO₂Absorption Capacities in Aqueous 2-(2-Aminoethylamino)ethanol and Its Blends with MDEA and TEA in the Presence of SO₂

Abstract

A study of carbon dioxide (CO2) and sulfur dioxide (SO2)/CO2 mixtures absorption has been carried out in aqueous 2-(2-aminoethylamino)ethanol (AEE) solution and its blends with N-methyldiethanolamine (MDEA) and triethanolamine (TEA) to estimate the influence of SO2, MDEA, and TEA on the CO2 absorption capacity of the AEE. The CO2 absorption loading has been estimated in 15 wt % AEE alone and in the presence of either 5 and 10 wt % MDEA or 5 and 10 wt % TEA solutions with 100 vol % CO2 and 5.03 and 15.02 vol % SO2/CO2 mixtures at a starting temperature of 296 K and flow rates of 3.067, 3.229, and 3.605 L/min, respectively. The results revealed that the presence of SO2 in the gas decreases the CO2 absorption rate and loading in the AEE solution as a function of the concentration of SO2. The additions of 5 and 10 wt % of MDEA and TEA do not seem to influence the CO2 absorption rate in the AEE solution. Moreover, the addition of MDEA increases slightly the CO2 absorption capacity of AEE, while TEA decreases the absorption capacity of AEE in the absence and presence of SO2. These effects were enhanced with increases of MDEA and TEA. Altogether, the results indicated that the blend of 15 wt % AEE + 10 wt % MDEA represents an interesting solvent which could be used as absorbent for the removal of CO2 from emission into the atmosphere by industries.

CO2 capture by pyrrolidine: Reaction mechanism and mass transfer

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“…1 Several technologies are available to reduce the carbon dioxide emission from industrial gas streams, but the chemical absorption with alkanolamines is the most widely used methodology. 2,3 This method is efficient and it usually allows the removal of a high percentage of the emitted carbon dioxide.…”

Hollow fiber membrane contactor transient experiments for the characterization of gas/liquid thermodynamics and mass transfer properties

“…Several technologies are available to reduce CO 2 emissions from industrial gas streams but the most effective one involves a liquid solvent which selectively captures the CO 2 through a molecular affinity (physical solvent) or a chemical reaction (chemical solvent). For instance, for low to moderate CO 2 pressures, chemical absorption with alkanolamines solutions usually permits the removal of 75%-90% of the CO 2 contained in the gas streams (Bonenfant et al, 2007). In order to find the most efficient solvents for CO 2 capture, there is therefore an increasing need to understand the mass transfer mechanisms occurring in such systems.…”

Advances in Liquid Absorbents for CO2 Capture: A Review

“…25 2-(2-aminoethylamino)ethanol (AEE) solution and its blends with MDEA and TEA were used by Bonenfant et al to absorb CO 2 in the presence of sulfur dioxide (SO 2 ) to evaluate their influence on AEE's performance. 30 It was found that the presence of SO 2 lowers the CO 2 absorption rate and loading, while additions of ).…”