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Amine degradation

Anette Mathisen

25/09/2009 12:24 pm

Degradation of amines during the post-combustion process is unwanted and it is important to understand the mechanisms behind this.

  • Alkanolamines are well known to absorb acid gasses like CO2. The processes which are based on these types of components are continuously being refined.
  • Monoethanolamine (MEA) and methyldiethanolamine (MDEA) are absorbents commonly used in CO2 capture.
  • The CO2 rich flue gas also contains other components like oxygen, SOx, NOx, dust.
  • These are unwanted components and can result in chemical and thermal degradation of the absorbents.
  • In the CO2 capture process the absorbents react with the CO2 in the absorption column, and then regenerated in the stripping column by adding heat.
  • In the regeneration process the waste is retained and collected in a reclaimer.
  • This waste must be taken care of in an environmentally sound way.
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