化工学报2023，Vol.74Issue(10)：4330-4342,13.DOI:10.11949/0438-1157.20230584
高选择性PEI@MOF-808吸附剂在潮湿烟气中的碳捕集性能研究
Study on the carbon capture performance of highly selective PEI@MOF-808 adsorbent in humid flue gas
摘要
Abstract
Zr-based metal organic framework MOF-808 is used as the carrier and is functionalized with polyethylenimine(PEI)to obtain PEI@M-808 composite material,which is used to selectively capture humid flue gas(10%CO2 + 90%N2 + 10 kPa H2O).The physicochemical properties of the sorbents are characterized by XRD,FT-IR,SEM,and BET techniques,and the effectiveness of the modification scheme is assessed.The sorption performance of PEI300-30@M-808 at trace CO2 with moisture is dramatically enhanced due to the abundant amine groups on the surface of PEI@M-808 corresponding to the loading of PEI molecules.The adsorption performance of the composite adsorbent at trace CO2 concentration is greatly enhanced by the introduction of abundant amine functional groups on the surface of MOF-808 due to the loading of PEI.The PEI300-30@M-808 could trap 0.89 mmol/g at 343 K and 0.1 bar while the MOF-808 manifests sorption capacity of approximately 0.052 mmol/g under the same condition.Furthermore,the sorption selectivity of PEI300-30@M-808 is 5524.65 at 10/90 CO2/N2 at 0.1 bar and 343 K,which is about 56 times larger compared to that of MOF-808.Additionally,per gram of PEI300-30@M-808 could react with 1.47 mmol/g at the sorption condition with 5%RH,indicating that the moisture has a positive effect for CO2 capture with PEI-based materials.After 5 cycles,the CO2 saturated adsorption capacity of PEI300-30@M-808 can still be maintained at 90.7%.Therefore,the PEI300-30@M-808 feature great potential for trace carbon capture in moist flue gas.关键词
二氧化碳捕集/吸附剂/聚乙烯亚胺/选择性/烟道气Key words
carbon dioxide capture/adsorbents/polyethyleneimine/selectivity/flue gas分类
化学化工引用本文复制引用
张鑫琦,张宸,张舵咏,宣涛,干桌臻,朱炫灿,王丽伟..高选择性PEI@MOF-808吸附剂在潮湿烟气中的碳捕集性能研究[J].化工学报,2023,74(10):4330-4342,13.基金项目
国家重点研发计划项目(2022YFB4101702) （2022YFB4101702）
