文献类型：期刊文献

英文题名：Adsorption and regeneration study of polyethylenimine-impregnated millimeter-sized mesoporous carbon spheres for post-combustion CO2 capture

作者：Wang, Mei[1];Yao, Liwen[1];Wang, Jitong[1,2];Zhang, Zixiao[1];Qiao, Wenming[1];Long, Donghui[1];Ling, Licheng[1]

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Chinese Acad Sci, Inst Coal Chem, Key Lab Carbon Mat, Taiyuan 030001, Peoples R China

年份：2016

卷号：168

起止页码：282

外文期刊名：APPLIED ENERGY

收录：;EI(收录号：20160701945237);WOS:【SCI-EXPANDED(收录号:WOS:000373863500025)】；

基金：This work was partly supported by MOST (2014CB239702) and National Science Foundation of China (No. 51302083, No. 51172071, No. 51272077, No. 21506061), and Fundamental Research Funds for the Central Universities and Shanghai Rising Star Program.

语种：英文

外文关键词：Post-combustion CO2 capture; Polyethylenimine; Mesoporous carbon spheres; Adsorption; Regeneration strategies

摘要：The feasibility of polyethylenimine (PEI)-impregnated millimeter-sized mesoporous carbon spheres (MCSs) for post-combustion CO2 capture is systematically studied over a wide range of adsorption and regeneration conditions. MCSs with developed mesoporous structure and good electrical conductivity are used as supports, while high-molecular-weight PEI (M-n similar to 10,000) is screened to be the optimal amine due to its thermal stability. At the optimal polyethylene glycol (PEG) loading of 20 wt.%, the mass/volume-based adsorption capacity is efficiently improved by 25.7% and 109.5%, respectively. The optimized adsorbent exhibits high equilibrium adsorption capacity of 163.4 mg/g for 15% CO2 at 75 degrees C under dry condition, and it could be further enhanced to 187.5 mg/g at the relative humidity of 60%. The presence of O-2, SO2, NO and NO2 would lead to the decreased adsorption capacity after consecutive adsorption-desorption cycles, due to the irreversible chemical reaction. Moisture could inhibit the negative effect of O-2 but deteriorate the detrimental effects of SO2, NO and NO2. Depending on the good sphericity, uniform particle size, excellent thermal electrical conductivity and good mechanical properties of MCS, PEI-impregnated MCS adsorbents could be directly used in fixed bed system and be applicable for thermal swing adsorption (TSA), vacuum swing adsorption (VSA) and novel electric swing adsorption (ESA) processes. The adsorbents could maintain fairly stable cyclic performance during the rapid VSA process, making rapid VSA of great potential for technical-economical post-combustion CO2 capture. (C) 2016 Elsevier Ltd. All rights reserved.