CO2 capture into aqueous solutions of 3-methylaminopropylamine activated dimethyl-monoethanolamine

Pilot study—CO2 capture into aqueous solutions of 3-methylaminopropylamine (MAPA) activated dimethyl-monoethanolamine (DMMEA)

“…Minimum and maximum temperature profile of the absorber and desorber during the campaign. Comparing the equilibrium curve of the DMMEA/MAPA system with MEA it seems that for MEA, at a partial CO 2 pressure of ∼10 kPa and 40 • C, one may obtain a loading around 0.46 mol CO 2 /mol amine (Brúder et al, 2012). For 3 M DMMEA/2 M MAPA the highest partial CO 2 pressure reached at laboratory conditions was only 8.8 kPa pressure at a loading of ∼0.73 mol CO 2 /mol amine (0.52 mol CO 2 /mol NH x ) at 40 • C. At 10 kPa a loading 0.75 would be a conservative estimate.…”

“…In this paper a pilot study on the mixed 3 M DMMEA/2 M MAPA system is described. This system was found to have a potential for both lower heat of regeneration and lower environmental impact than MEA (Brúder et al, 2012;Eide-Hagumo et al, 2009). …”

“…The highest loading experimentally reached at 120 • C with the 3 M DMMEA/2 M MAPA system was ∼0.62 mol CO 2 /mol amine (0.44 mol CO 2 /mol NH x ) with a corresponding CO 2 partial pressure of 560 kPa (due to equipment limitations). An extrapolation of the 120 • C equilibrium data gives an estimate of the CO 2 partial pressure at a loading of 0.75 mol CO 2 /mol amine (0.53 mol CO 2 /mol NH x ) of about 1700 kPa, about four-five times the partial pressure above MEA at its maximum reached loading at 40 • C (MEA model from Brúder et al, 2012). From the data is clear that as the equilibrium curves of 40 • C and 120 • C move closer for MEA above a loading 0.4 mol CO 2 /mole amine.…”

“…The equilibrium pressures (P bulk ) of MEA and DMMEA/MAPA were calculated from the equilibrium models presented earlier (Brúder et al, 2012). The values given in Fig.…”

Solvents for Carbon Dioxide Capture

“…Piperazine and potassium carbonate PZ+ K 2 CO 3 [25] 2-amino-2-methyl-1-propanol and piperazine AMP+ PZ [26] 2-amino-2-methyl-1-propanol and 1,2-ethanediamine AMP+ EDA [27] 3-methylamino propylamine and dimethyl-monoethanolamine MAPA + DMMEA [28] Table 4. A summary of most relevant solvent blends reported from the literature [14].…”