Co2 adsorption system and method for co2 adsorption using humidity stable polystyrene-divinylbenzene amine functionalized polymeric adsorbents

A method for separating gaseous carbon dioxide from a gas mixture, containing said gaseous carbon dioxide as well as further gases different from gaseous carbon dioxide, by cyclic adsorption/desorption using a sorbent material adsorbing said gaseous carbon dioxide in a unit,

• wherein the method comprises at least the following sequential and in this sequence repeating steps (a)-(e):
• (a) contacting said gas mixture with the sorbent material to allow at least said gaseous carbon dioxide to adsorb on the sorbent material by flow-through through said unit under temperature and pressure conditions of the supplied gas mixture, in an adsorption step;
• (b) isolating said sorbent material with adsorbed carbon dioxide in said unit from said flow-through while maintaining the temperature in the sorbent;
• (c) injecting a stream of saturated or superheated steam by flow-through through said unit and thereby inducing an increase of the temperature of the sorbent material to a temperature between 60° and 110° C., starting the desorption of CO2;
• (d) extracting at least the desorbed gaseous carbon dioxide from the unit and separating gaseous carbon dioxide from steam by condensation downstream of the unit;
• (e) bringing the sorbent material to the temperature and pressure conditions of the supplied gas mixture;
• wherein said sorbent material 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, in the range of 10-25 m2/g and with a pore volume distribution such that the cumulative pore volume in the range of 50-350 nm is in the range of 0.28-1.5 cm3/g.