Methods and systems for emissions control in solvent-based CO2 capture processes using CO2

Rayer Rabindran, Aravind V.; Gupta, Vijay; Mobley, Paul D.; Tanthana, Jak; Zhou, Shaojun; Tobiesen, Finn Andrew; Mejdell, Thor; Grimstvedt, Andreas; Haugen, Geir

DOE OSTI · 1924981

Methods and systems for emissions control in solvent-based CO2 capture processes using CO2

Rayer Rabindran, Aravind V.·Gupta, Vijay·Mobley, Paul D.·Tanthana, Jak·Zhou, Shaojun·Tobiesen, Finn Andrew·Mejdell, Thor·Grimstvedt, Andreas·Haugen, Geir

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Abstract

A method with corresponding systems for reducing emission of amines to the atmosphere. The method includes a a) introducing a gas containing CO 2 into an absorber; b) flowing the flue gas through an absorber having an absorbent with a water-lean solution having less than 50% water and one or more amines, with the absorbent capturing the CO 2 and forming a reduced CO 2 content gas having a baseline CO 2 content; and c) washing the reduced CO 2 content gas in a wash column with a wash solution comprising carbonic acid formed by addition of gaseous CO 2 into the wash solution. In this method, the washing removes the amines from the reduced CO 2 content gas and produces a reduced amine content gas exiting from the wash column.

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Rayer Rabindran, Aravind V., Gupta, Vijay, Mobley, Paul D., Tanthana, Jak, Zhou, Shaojun, Tobiesen, Finn Andrew, Mejdell, Thor, Grimstvedt, Andreas, Haugen, Geir. 2022-08-16. Methods and systems for emissions control in solvent-based CO2 capture processes using CO2. https://www.osti.gov/biblio/1924981

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