Absorption of carbon dioxide in mixtures of N-methyl-2-pyrrolidone and 2-amino-2-methyl-1-propanol

Screening Study of Different Amine-Based Solutions as Sorbents for Direct CO2 Capture from Air

“…In the absence of water, the formation of bicarbonate and carbonate ions (reactions –) cannot take place and CO 2 reacts with an excess of both primary and secondary amines to produce the carbamate of the amines (reaction ). Moreover, organic diluents with hydroxyl groups can react with CO 2 in the presence of a base (in this case, the amine), leading to the formation of alkyl carbonates (in the following equation, R denotes the alkyl groups CH 3 CH 2 OCH 2 CH 2 OCH 2 CH 2 –, HOCH 2 CH 2 –, or CH 3 CH 2 CH 2 −) , …”

“…The carbonated species formed upon the CO 2 uptake and their relative amounts were evaluated by 13 C NMR spectroscopy, a powerful noninvasive analytical technique that can provide valuable information on the absorption mechanism. , The performances of some amines have also investigated in organic diluents, namely, in diethylene glycol monoethyl ether (DEGMEE) or in a 1:1 (volume scale) mixture of ethylene glycol (EG) and 1-propanol (PrOH). The higher solubility of CO 2 in organic diluents than in water, and the lower heat capacity and vapor pressure of organic diluents compared to water, could enhance the CO 2 absorption and reduce the heat required for the sorbent regeneration: as a matter of fact, several studies have shown that the use of organic diluents instead of water can lower the desorption temperature well below 100 °C. − Moreover, we have recently verified that, for the same amine, the heat of CO 2 desorption in organic solutions is lower than in aqueous solution …”

Fast and Efficient CO2 Absorption in Non-aqueous Tertiary Amines Promoted by Ethylene Glycol

“…To cut the energy consumption of CO 2 capture, non-aqueous absorbents have been developed as the future application prospects. 18 Knuutila et al evaluated the potential of five hybrids of tertiary amines promoted with a primary amine and compared the regeneration energy consumption, 6 proving a low energy cost for the non-aqueous absorbents. Generally, both the absorption performance and energy consumption are important criteria for the selection of CO 2 absorbents.…”

Binary System of Polyethylene Glycol 200 (1) + 3-Dimethylamino-1-propylamine (2) for CO2 Absorption: Thermophysical Properties and Spectroscopic Study

“…Representative amine scrubbing is the most commonly used commercial technology for CO 2 capture through chemical absorption. 12 , 13 However, the loss of amine by volatilization easily causes secondary pollution in the process of CO 2 removal. Especially, there are also some shortcomings, such as equipment corrosion, relatively high cost, and serious loss of efficiency.…”

“…The extensive use of fossil fuels and the rapid increase of CO 2 content in the atmosphere have caused the greenhouse effect and the negative consequences of global climate changes, and this has attracted widespread attention. , Experts generally deem CO 2 capture and utilization (CCU) to be one of the most effective methods to reduce global CO 2 emissions. , Various methods have been proposed to capture CO 2 , such as solid adsorption, , membrane separation, , and organic solvent scrubbing. − The organic solvent scrubbing method involves either physical or chemical solvents according to the strength of the solvent–solute interaction. Representative amine scrubbing is the most commonly used commercial technology for CO 2 capture through chemical absorption. , However, the loss of amine by volatilization easily causes secondary pollution in the process of CO 2 removal. Especially, there are also some shortcomings, such as equipment corrosion, relatively high cost, and serious loss of efficiency.…”