CARBON DIOXIDE ABSORBER, METHOD FOR ITS PREPARATION AND METHOD FOR PURIFICATION OF GAS MIXTURES Russian patent published in 2021 - IPC B01D53/56 B01D53/62 B01D53/94 B01J20/06 B01J20/30 

FIELD: chemistry.

SUBSTANCE: group of inventions relates to an absorber for removing carbon dioxide from gas mixtures, a method for its preparation, as well as a method for cleaning gas mixtures from carbon dioxide. A carbon dioxide absorber containing potassium carbonate deposited on a porous matrix of zirconium dioxide aerogel in the amount of 71-91 wt.%, the rest is potassium carbonate, is proposed. A variant of the method for preparation of the absorber is described. A method for cleaning gas mixtures from carbon dioxide is also described. In the proposed method, carbon dioxide is isolated from the mixture by the proposed absorbers, while CO₂ is isolated from gas mixtures at a temperature of 10-50°C and a partial pressure of CO₂ at the sorption stage in a gas mixture of 10 Pa - 0.5 kPa periodically with the process of thermal regeneration of the absorber at a temperature of 150-300°C. This method can be used for the adsorption release of carbon dioxide from atmospheric air and flue gases, ventilation systems.

EFFECT: group of inventions provides a high and stable sorption capacity of the regenerated absorber during operation.

3 cl, 3 dwg, 1 tbl, 4 ex