Amine reclaiming technologies in post-combustion carbon dioxide capture


Tielin Wang , Jon Hovland , Klaus J. Jens

DOI:10.1016/j.jes.2014.06.037

Received March 31, 2014,Revised June 18, 2014, Accepted , Available online January 19, 2015

Volume 27,2015,Pages 276-289

Amine scrubbing is the most developed technology for carbon dioxide (CO2) capture. Degradation of amine solvents due to the presence of high levels of oxygen and other impurities in flue gas causes increasing costs and deterioration in long term performance, and therefore purification of the solvents is needed to overcome these problems. This review presents the reclaiming of amine solvents used for post combustion CO2 capture (PCC). Thermal reclaiming, ion exchange, and electrodialysis, although principally developed for sour gas sweetening, have also been tested for CO2 capture from flue gas. The three technologies all have their strengths and weaknesses, and further development is needed to reduce energy usage and costs. An expected future trend for amine reclamation is to focus on process integration of the current reclaiming technologies into the PCC process in order to drive down costs.

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