Purification of aqueous amine solvents used in post combustion CO2 capture: A review

Degradation study of piperazine, its blends and structural analogs for CO2 capture: A review

“…Expected energy required for an advanced amine systems for CO 2 capture is about 220 kilowatt hour per ton (kWh/ton) CO 2 removed . The most conventional amines used in this technology are monoethanolamine (MEA), methyldiethanolamine (MDEA), and diethanolamine (DEA) (Dumée et al, 2012;Lowe et al, 2009;MacDowell et al, 2010). These amines undergo irreversible reactions due to reactions with acidic gases (CO 2 , H 2 S, COS, CO, SOx, and NOx), elevation of temperature, and oxidation (Freeman et al, 2010a;Goff and Rochelle, 2006;Islam et al, 2010Islam et al, , 2011Lepaumier et al, 2009;Wang et al, 2011).…”

Reclaiming of degraded MEA solutions by electrodialysis: Results of ED pilot campaign at post-combustion CO 2 capture pilot plant

“…Amine-based solvents can also react with inorganic, acidic impurities in flue gases (SO 2 , NO 2 , HCl, etc.) aside to the carboxylic acids to form heat stable salts (HSS) decreasing the CO 2 capacity of amine due to lower pK a value (Dumée et al, 2012;Strazisar et al, 2003).…”

“…The purified solvent (diluate) is returned to the main solvent loop. The ED process is believed to be less energyconsuming technique than thermal reclaiming (Dumée et al, 2012) and with lower chemical consumption and waste level in contrast to IEX process (Wang et al, 2015). However, the principle of this method does not allow to remove non-charged degradation products.…”

Remediation of monoethanolamine after exposure to brown coal flue gases

“…However, over time, the MEA accumulates impurities (Dumée et al, 2012;Reynolds et al, 2012). Anionic impurities include heat stable salts such as formate, oxalate and acetate from reactions with residual oxygen (Goff and Rochelle, 2004), sulphites, sulfates from reaction with SOx and nitrates and nitrites from reaction with NOx (Supap et al, 2009).…”