

An innovative method for the separation of CO2 from gases, e.g. flue or synthesis gas, by chemisorption using an aqueous solution of mixed lipophilic amines, such as
N,N- Dimethylcyclohexylamine (DMC). The amine solution loaded with CO2 is regenerated with the help of a temperature induced thermomorphic liquid-liquid-phase separation at moderate temperatures lying well below 100°C. The amines partition into a distinct organic phase, while the CO2 initially remains in the aqueous phase as HCO3- from which it is then liberated and recovered as a gas. Commercial Opportunities: Since the dissociation of the amines from CO2 is brought about by the liquid-liquid miscibility gap, the solvent regeneration operates at much lower temperatures than in conventional CO2-capture processes and can thus be tailored to utilize previously unexploited waste heat sources. The low heat of reaction and dispensing with stripping steam leads to an extremely energy-efficient process for CO2 capture from industrial gases comparable with or superior to the best state-of-the-art technologies. Further advantages include the excellent CO2 absorption kinetics and the improved resistance to oxidative degradation.
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PROvendis GmbH
Tel.: +49 (0)208/94105 10
Ansprechpartner
Dipl.-Ing. Alfred Schillert