CO2捕集用胺基吸收剂的研究进展OA

Carrying out CO2 capture is an effective approach to mitigating the contradiction between fossil energy utilization and global warming.Amine-based absorbents are the primary materials used for CO2 capture via chemical absorption.The mechanism of CO2 capture by amine-based absorbents was introduced and the structural characteristics and capture performance of various types were compared.Single-component amine absorbents feature simple preparation processes but suffer from low CO2 absorption capacity(from 0.50 mol/mol to 0.53 mol/mol)and high regeneration energy consumption(from 3.5 GJ/t to 4.0 GJ/t).By introducing other absorbents to form mixed amine systems,the CO2 absorption capacity can be increased to 0.706 mol/mol(2-amino-2-methyl-1-propanol and N-methyl-4-piperidinol),while reducing regeneration energy consumption and enhancing economic efficiency.Two-phase absorbents require heating only the CO2-rich phase,resulting in a regeneration energy consumption as low as 1.61 GJ/t(2-amino-2-methyl-1-propanol/piperazine/ethylene glycol dimethyl ether).They also exhibit good stability and thus show promising development prospects.Low-water(or anhydrous)absorbents exhibit outstanding CO2 absorption capacity but slower absorption rates,with regeneration energy consumption reaching 2.365 GJ/t(diethylenetriamine-triethanolamine).Novel absorbents such as ionic liquids show excellent CO2 capture performance and can effectively overcome problems associated with traditional absorbents,such as high energy consumption,rapid degradation,equipment corrosion and high cost.However,further research and validation are still required before large-scale application.The review can provide a reference for the selection and performance improvement of amine-based absorbents for CO2 capture.