Sinvent as

Sintef Tto as

Ntnu Technology Transfer as

Aker Carbon Capture Norway as

Aker Engineering & Technology as

Karl Anders Hoff

Thor Mejdell

Finn Andrew Tobiesen

Inna Kim

Hallvard F Svendsen

Andreas Grimstvedt

Olav Juliussen

Ugochukwu E Aronu

Eirik Falck Da Silva

Aslak Einbu

Terje Vassbotn

Andrew Tobiesen

An aqueous CO2 absorbent comprising a combination of 2-amino-2-methyl-1-propanol (AMP) and 3-aminopropanol (AP), or AMP and 4-aminobutanol (AB), is described. A method for capturing CO2 from a CO2 containing gas using the mentioned absorbent, and the use of a combination of AMP and AP, or a combination of AMP and AB are also described.

Aqueous CO2 absorbent comprising 2-amino-2-methyl-1-propanol and 3-aminopropanol

The present invention relates to an absorbent, an absorbent system and a process for removing acidic gas such as COfrom exhaust gases from fossil fuel fired power stations, from natural gas streams, from blast furnace oven off-gases in iron/steel plants, from cement plant exhaust gas and from reformer gases containing COin mixtures with HS and COS. The liquid absorbent, a mixture of amine and amino acid salt is contacted with a COcontaining gas in an absorber and COin the gas stream is absorbed into the liquid. The absorbed COforms more than one type of solid precipitate in the liquid at different absorption stages. In a first absorption stage solid precipitate of amine bicarbonate is formed and is withdrawn as slurry from the bottom of a first absorber section. In a second absorption stage solid precipitate of alkali metal bicarbonate is formed and withdrawn as slurry at the bottom of a second absorber section. The slurry withdrawn from the first absorption section is heated to dissolve the precipitate with COrelease in an amine flash regeneration tank. The slurry from the second precipitation stage is withdrawn from the bottom of the second absorber section and sent to a regenerator for desorption with COrelease. The lean amine and amino acid salt mixture from the flash regenerator and desorber are mixed and returned to the top of the absorber. This absorbent system improves carbon dioxide removal efficiency due to its higher COremoval ability per cycle when compared with conventional amine, absorbent from organic acid neutralized with inorganic base and carbonate based absorbent system. It exhibits less solvent vaporization loss because part of the absorbent is in salt form.

Absorbent system and method for capturing COfrom a gas stream

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

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Trondheim, Norway

Karl Anders Hoff