4results about How to "Increase desorption rate" patented technology

The invention relates to the field of desorption and regeneration of a CO2-rich amine solution, and discloses a graphene aerogel, a regenerated catalyst, application of the regenerated catalyst and a regeneration method of the CO2-rich amine solution, the B acid content of the graphene aerogel is 0.001-0.05 mmol / g, the specific surface area is 40-200m < 2 > / g, and the volume of pores with the pore diameter being less than 20nm accounts for not less than 50% of the total pore volume of the graphene aerogel. The graphene aerogel is applied to a regenerated catalyst of a CO2-rich amine solution, and is beneficial to catalyzing CO2 desorption, reducing the initial temperature and the end temperature of desorption, increasing the desorption rate, shortening the desorption time, reducing the desorption energy consumption and increasing the desorption amount.

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.

The present invention belongs to the field of CO2 capture technology, and specifically relates to a graphene-based solid acid catalyst, a preparation method and application thereof, and a method for treating CO2 flue gas. The graphene-based solid acid catalyst uses a molecular sieve as a carrier, and graphene oxide, WO3 and TiO2 as active components. The key to the present invention is that graphene oxide, WO3 and TiO2 are simultaneously loaded on the molecular sieve carrier as active components, thereby not only significantly improving the desorption efficiency of CO2, but also reducing the desorption energy consumption. In addition, the graphene-based solid acid catalyst provided by the present invention has a strong catalytic ability and a large number of recycling times.