2results about How to "Increase desorption rate" patented technology

This application discloses a carbon dioxide desorption tower, a carbon dioxide desorption method, and a decarbonization system, belonging to the field of chemical equipment technology. The carbon dioxide desorption tower includes a tower body, a catalytic unit, a liquid collecting device, and a reboiler. The tower body has a first receiving cavity, a first liquid inlet, a first liquid outlet, and a gas outlet; the catalytic unit is located below the first liquid inlet; the liquid collecting device divides the first receiving cavity into a first chamber and a second chamber; the reboiler has a reboiler inlet and a reboiler outlet, and the tower body has a second liquid outlet and a second liquid inlet. Liquid in the first chamber flows sequentially into the reboiler through the second liquid outlet and the reboiler inlet, and liquid in the reboiler flows sequentially into the second chamber through the reboiler outlet and the second liquid inlet; wherein, the liquid collecting device is provided with a venting section, and the first chamber and the second chamber are connected through the venting section. The carbon dioxide desorption tower of this application can improve desorption efficiency and reduce desorption energy consumption.

The application discloses a kind of asymmetric structure double secondary amine propylenediamine carbon capture agent and preparation method thereof, it is related to organic synthesis technology and carbon dioxide capture and separation technical field.The method uses propylenediamine compound with primary amine group and secondary amine group as raw material, aldehyde compound is primary amine modifier.Based on the principle that nucleophilic addition reaction occurs between aldehyde group and primary amine group in propylenediamine compound, the primary amine group of propylenediamine compound is converted into secondary amine group containing hydroxyalkyl substitution structure, and becomes asymmetric structure N-alkyl N-hydroxyalkyl propylenediamine compound.The carbon capture agent has two secondary amine reaction sites, wherein alkyl substituent group can induce to increase the nucleophilicity of secondary amine nitrogen atom as electron-donating group, improve absorption performance, and hydroxyalkyl substituent group can promote the generation of unstable carbamate between secondary amine and CO2, improve desorption performance.