Abstract: Method for the preparation of sorbent material for use as adsorbent for carbon dioxide separation from a gas mixture, the sorbent material having primary amine or secondary amine moieties, or a combination thereof, immobilised on a solid support, wherein the sorbent material has primary amine or secondary amine moieties, or a combination thereof, is treated so as to have, after treatment, a total metal impurity content below 1400 ppm.

Abstract: The invention describes a method to regenerate the carbon capture capacity of amino based sorbents used for carbon capture, after they have lost partially or totally their carbon dioxide capture capacity due to oxidation during said carbon capture process.

Abstract: Method for the preparation of a sorbent material and for use of such a material for separating gaseous carbon dioxide from a gas mixture, preferably for direct air capture, using a temperature, vacuum, or temperature/vacuum swing process, comprising primary amine moieties immobilized on a solid support, wherein the primary amine moieties, in the ?-carbon position, are substituted by one hydrogen and one non-hydrogen substituent, wherein the sorbent material is in the form of a monolith, a layer, fibres, or particles, wherein the non-hydrogen substituent is selected from the group consisting of alkyl, alkenyl, arylalkyl, and wherein the solid support of the sorbent material is a porous material. Starting from a precursor of said sorbent material comprising one or multiple keto-groups, said one or multiple keto groups are converted into said primary amine moieties through a reductive amination.

Abstract: A method for separating gaseous carbon dioxide from a gas mixture, preferably from at least one of ambient atmospheric air (1), flue gas and biogas, by cyclic adsorption/desorption using a sorbent material (3), wherein the method comprises at least the following sequential and in this sequence repeating steps (a)-(e): (a) contacting said gas mixture (1) with the sorbent material (3) to allow gaseous carbon dioxide to adsorb; (b) isolating said sorbent material (3) from said flow-through; (c) inducing an increase of the temperature of the sorbent material (3); (d) extracting at least the desorbed gaseous carbon dioxide from the unit (8) and separating gaseous carbon dioxide from steam in or downstream of the unit (8); (e) bringing the sorbent material (3) to ambient atmospheric conditions; wherein said sorbent material (3) comprises primary and/or secondary amine moieties immobilized on a solid support, wherein the amine moieties, in the ?-carbon position, are substituted by one hydrogen and one non-hydrog

Abstract: Method for separating gaseous carbon dioxide from air, in particular from ambient atmospheric air (1), by cyclic adsorption/desorption using a sorbent material (3), wherein said sorbent material (3) is a solid inorganic or organic, non-polymeric or polymeric support material functionalized on the surface with amino functionalities capable of reversibly binding carbon dioxide, with a specific BET surface area, preferably measured by nitrogen adsorption, in the range of 1-20 m2/g.

Abstract: The invention relates to a method to produce a particulate activated carbon material for capturing CO2 from air, wherein the particulate activated carbon is impregnated with alkali carbonate salt such as K2CO3; and wherein the impregnated particulate activated carbon either has, determined using nitrogen adsorption methods, a pore volume of at least 0.10 cm3/g for pore sizes of at least 5 nm and a pore volume of at most 0.30 cm3/g for pore sizes of less than 2 nm or is based on a mixture of different alkali carbonate salts, or has a particular pore surface for pore sizes in the range of 2 nm-50 nm.

Abstract: The invention relates to a method to produce a particulate activated carbon material for capturing CO2 from air, wherein the particulate activated carbon is impregnated with alkali carbonate salt such as K2CO3; and wherein the impregnated particulate activated carbon either has, determined using nitrogen adsorption methods, a pore volume of at least 0.10 cm3/g for pore sizes of at least 5 nm and a pore volume of at most 0.30 cm3/g for pore sizes of less than 2 nm or is based on a mixture of different alkali carbonate salts, or has a particular pore surface for pore sizes in the range of 2 nm-50 nm.