Chemical absorption of carbon dioxide in non-aqueous systems using the amine 2-amino-2-methyl-1-propanol in dimethyl sulfoxide and N-methyl-2-pyrrolidone

• Solubility and heat of absorption data for CO 2 in mixtures AMP/DMSO. NMR characterization AMP/DMSO AMP/NMP. The decreases with increasing temperature. Decreasing amount chemically reacted solution Non-aqueous amine systems have been suggested as energy-efficient alternatives to conventional aqueous post-combustion carbon capture, low regeneration temperatures can be achieved. solubility non-aqueous were studied using the sterically hindered 2-amino-2-methyl-1-propnaol (AMP) organic solvent dimethyl sulfoxide (DMSO). 13 C was used study product species reacts AMP either DMSO or N -methyl-2-pyrrolidone (NMP). showed that loadings could achieved at 80–88 °C, indicating carried out lower than systems. Precipitation occurred 25 wt% DMSO, overall capacity system. decreased temperature, explained by physical dominating mechanism higher temperatures. This also confirmed results NMR, less absorbed observed reaction products AMP/NMP identified carbamate, bicarbonate from water impurities, carbonate reacting hydroxyl group AMP.