文献类型：期刊文献

英文题名：Energy-emission trade-off of a liquid-liquid phase-change solvent for post-combustion CO2 capture: Aerosol-dominated amine loss

作者：Wang, Xiaojun[1];Hu, Ximing[1,2];Fang, Mengxiang[1];Tian, Chengcheng[2];Xia, Zhixiang[1];Wang, Zhonghui[1];Zheng, Menglian[1];Huang, Zhongbin[3];Park, Young O. K.[4]

机构：[1]Zhejiang Univ, State Key Lab Clean Energy Utilizat, Hangzhou 310018, Peoples R China;[2]East China Univ Sci & Technol, Integrated Res Platform Greener Hydrogen Prod & Ut, Shanghai 200237, Peoples R China;[3]Tongxing Environm Protect Technol Co Ltd, Hefei 230091, Peoples R China;[4]Daehan PNC, Adv Filtrat Technol Dev Inst, Dangjin City 31721, South Korea

年份：2026

卷号：411

外文期刊名：SEPARATION AND PURIFICATION TECHNOLOGY

收录：;EI(收录号：20263021187369);Scopus(收录号：2-s2.0-105045684245);WOS:【SCI-EXPANDED(收录号:WOS:001836739400001)】；

基金：This work is supported by National Key Research and Development Program of China (2023YFE0199300) , National Key Research and Development Program of China (2023YFB4103900) , Pioneer R & D Program of Zhejiang Province of China (2025C01158) and "the Fundamental Research Funds for the Central Universities" (2022ZFJH004) .

语种：英文

外文关键词：CO 2 capture; Amine emissions; Phase-change solvents; Aerosol; Pilot plant

摘要：Liquid-liquid biphasic solvents have been developed to reduce the regeneration energy of post-combustion CO2 capture, but phase-selective operation may increase amine emissions, especially through aerosol formation. Here, we investigated the energy-emission trade-off of a monoethanolamine/N-methyldiethanolamine/diethylene glycol dimethyl ether (MEA/MDEA/DGM) solvent operated in homogeneous and biphasic regeneration modes in a pilot-scale CO2 capture system. In homogeneous mode, the phase separator was bypassed and the entire loaded solvent was regenerated, whereas in biphasic mode only the CO2-rich phase was sent to the stripper. Compared with 30 wt% MEA, the MEA/MDEA/DGM solvent reduced the regeneration energy from 3.8 GJ/t CO2 to 2.64 GJ/t CO2 in homogeneous mode and 2.36 GJ/t CO2 in biphasic mode. However, biphasic operation increased absorber-outlet amine emissions from 328 to 512 mg/Nm3, revealing that the additional energy saving was accompanied by an emission penalty. The amine emissions decreased with increasing leansolvent CO2 loading but increased with lean-solvent temperature, indicating that the lean-solvent state governed amine escape. Aerosol measurements showed that ultrafine inlet nuclei below 0.03 mu m grew into aminecontaining droplets mainly in the 1-5 mu m range. Biphasic operation produced a much higher aerosol mass peak, indicating that enhanced condensational growth, rather than a higher inlet particle number, drove the emission increase. Single- and double-stage water wash configurations were further evaluated as conventional downstream mitigation configurations. Double-stage water wash reduced total amine emissions to 45 mg/Nm3 in biphasic mode and 32 mg/Nm3 in homogeneous mode. Nevertheless, aerosol-phase amines still accounted for 70-75% of residual emissions. In conclusion, future deployment of low-energy water-lean biphasic solvents requires an integrated co-optimization framework that couples regeneration energy, aerosol formation, downstream emission control, and solvent loss.