Process for capturing CO2 from a CO2-containing gas stream using a thermoresponsive copolymer

J.P.A. Custers (Uitvinder), M.T. de Groot (Uitvinder), A.J.B. ten Kate (Uitvinder), J.T.F. Keurentjes (Uitvinder), D.T.A. van Asseldonk (Uitvinder)

Onderzoeksoutput: OctrooiOctrooi-publicatie

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Samenvatting

The present invention pertains to a process for capturing CO2 from a CO2- containing gas stream, comprising the steps of contacting a CO2-containing gas stream with a CO2-absorbing agent in an absorption step in a vessel with a maximum temperature T1 resulting in absorption of CO2, the CO2-absorbing agent comprising a polymer dissolved in an aqueous medium, the polymer being a thermoresponsive copolymer comprising amine monomer distributed through the copolymer, and subjecting the CO2-containing absorbing agent to a desorption step in a vessel with a maximum temperature T2, resulting in the release of CO2, wherein T1 is below the LCST of the thermoresponsive polymer at maximum CO2 loading, and T2 is above the LCST of the thermoresponsive polymer at minimum CO2 loading, wherein the CO2 absorbing agent additionally comprises amine component dissolved in the aqueous medium. The use of the specific polymer in the present invention which is dissolved in an aqueous medium at T1, and wherein amine monomer is distributed through the copolymer in combination with an amine component shows an improved net CO2 sorption and a high absorption speed, which allows the use of a relatively small absorption reactor.
Originele taal-2Engels
OctrooinummerWO2014140108
StatusGepubliceerd - 18 sep. 2014

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