Sinvent as

Ntnu Technology Transfer as

Aker Engineering & Technology as

Hallvard F Svendsen

Thor Mejdell

Karl Anders Hoff

Finn Andrew Tobiesen

Olav Juliussen

Terje Vassbotn

Andrew Tobiesen

The present invention relates to a method for capturing COfrom exhaust gas in an absorber (A), wherein the COcontaining gas is passed through an aqueous absorbent slurry wherein said aqueous absorbent slurry comprises an inorganic alkali carbonate, bicarbonate and at least one of an absorption promoter and a catalyst, and wherein the COis converted to solids by precipitation in the absorber, said slurry having the precipitated solids is conveyed to a separating device (F), in which the solids are separated off, essentially all of at least one of the absorption promoter and catalyst is recycled together with the remaining aqueous phase to the absorber.

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The invention relates to a new method for removing and recovering of acid gases from a gaseous mixture in an absorption plant by adding an organic acid to a stream of the rich absorbent in the desorber in order to release acid gas by shifting the acid gas equilibrium towards the gas side, and the organic acid is subsequently separated from the absorbent. With this method, the energy consumption of the process is substantially reduced. The invention also relates to an apparatus for performing this method.

Method and apparatus for energy reduction in acid gas capture

Growing community of inventors

Trondheim, Norway

Hallvard F Svendsen