Study on the Activity of New Amine Based Absorbents for CO2 Absorption from Flue Gases2nd IBB Conference (2010)
AbstractThe capture of CO2 from flue gases can be done by chemical absorption with aqueous amine solutions like MEA (monoethanolamine). Although this is a proven process, there are still operational problems to overcome , namely those resulting from solvent degradation, precipitation, corrosion and foaming. Also, the absorption capacity of the most current amines must be improved in order to obtain a more profitable operation. It has been shown previously that relationships exist between the amine structure and the activity/capacity for CO2 absorption. The introduction of amine substituents at the α-carbon creates a carbamate instability, which causes the hydrolysis to go faster, thus increasing the amount of bicarbonate, allowing for higher CO2 loadings. In order to obtain a better understanding of the structure-activity relationship, laboratory studies have been made comprising solvent screening experiments investigating the effect of variables such as chain length, increase in number of functional groups, side chain at α-carbon position, alkyl group position in cyclic amine and side effect of cyclic amine with different functional groups. The description of these effects, in a quantitative way, on the initial rate of absorption for CO2, as well as the capacity of various solvents for CO2 absorption is also supported by simulation using ASPEN/HYSYS and it is believed to benefit on the design of more efficient absorption systems for CO2 capture from flue gases.
- CO2 ; Amines ; Flue Gases
Citation InformationJoão F Gomes. "Study on the Activity of New Amine Based Absorbents for CO2 Absorption from Flue Gases" 2nd IBB Conference (2010)
Available at: http://works.bepress.com/joao_gomes/38/