Energy-saving and environment-friendly phase change CO2 trapping absorbent

By using a mixed solution of hydroxyethylethylenediamine, N-N diethylhydroxylamine and solvent, and adding iron oxide nanoparticles as reinforcement, the existing phase change CO2 capture absorber has solved the problems of small absorption capacity, low desorption efficiency and high regeneration energy consumption, and achieved an efficient and energy-saving CO2 capture effect.

CN119733346AActive Publication Date: 2025-04-01CHINA UNIV OF MINING & TECH
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Patent Information

Application Number
CN202411924321.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-25
Publication Date
2025-04-01
Estimated Expiration
2044-12-25

AI Technical Summary

Technical Problem

The existing phase-change CO2 capture absorbents have problems such as small absorption capacity, low desorption efficiency, unstable phase separation and high regeneration energy consumption, which limits their application in coal-fired power plants.

Method used

A mixed liquid composed of hydroxyethylethylenediamine, N-N diethylhydroxylamine and solvent is used as the phase change CO2 capture absorber, and a nanoparticle reinforcer iron oxide is added to improve absorption and desorption performance.

Benefits of technology

It significantly improves the absorption capacity and capture rate of CO2, reduces regeneration energy consumption, improves desorption efficiency, and enhances the stability of phase separation, achieving the energy-saving and environmentally friendly treatment requirements for CO2 capture.

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Abstract

The invention discloses an energy-saving and environment-friendly phase-change CO2 trapping absorbent. The energy-saving and environment-friendly phase-change CO2 trapping absorbent is a mixed solution prepared from the following components in percentage by mass: 20-30% of hydroxyethyl ethylenediamine, 20-30% of N-N diethylhydroxylamine and 50-60% of a solvent, the solvent is one of sulfolane, normal propyl alcohol, diethylene glycol dimethyl ether and dimethyl sulfoxide. The absorbent further comprises a nano-particle enhancer ferric oxide, and the adding amount of the nano-particle enhancer ferric oxide is 1.5%-2.0% of the mass of the mixed solution. According to the CO2 absorbent, the CO2 absorption capacity can be increased, the CO2 capture rate can be increased, meanwhile, regeneration energy consumption can be reduced, and the desorption effect can be improved, so that the energy-saving and environment-friendly treatment requirements of CO2 capture can be met.
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