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Presentation
Study on the Activity of New Amine Based Absorbents for CO2 Absorption from Flue Gases
2nd IBB Conference (2010)
  • João F Gomes
Abstract
The 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 [1], 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.
Keywords
  • CO2 ; Amines ; Flue Gases
Publication Date
2010
Citation Information
João 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/