分子模板法策略制备多胺注入的多孔有机聚合物实现高效CO_2捕获与分离（英文）

A molecular-templating strategy to polyamine-incorporated porous organic polymers for unprecedented CO_2 capture and separation

本论文用简单、通用的分子模板策略制备了具有极高CO_2吸附与分离效率的多胺注入多孔有机聚合物(POPs).在该策略中, CO_2分子存在下,多胺能均匀分散在母体多孔材料中. CO_2模板分子能够产生有效的均匀分布孔,能允许CO_2分子进入但不允许其他较大分子如N_2和CH_4进入.在0.15 bar和323 K下,制备的PPN-6/PEI-165展现出超高的4.52 mmol g^(-1)CO_2吸附量且没有检测到N_2和CH_4吸附.此外,该材料对水汽稳定且温和条件(343K下真空)下易再生.据我们所知,该结果在迄今为止所报道的固体多孔吸附剂中有最好的CO_2选择性捕获性能.

Carbon capture and storage(CCS)is a feasible strategy to mitigate the increasing carbon dioxide(CO2)emission,which is believed to be responsible for ocean acidification and global warming.Simultaneously,the separation of CO2 from natural gas is also of critical importance in industry,because CO2 as the major impurity significantly reduces the conversion rate and energy content of natural gas[1].Currently,the main-stream technology for largescale capture and sorption of CO2 from industrial streams is amine-based wet scrubbing because the amine-based solutions have large CO2 capacity and high selectivity for acidic gases.However,a major drawback of their high heat capacity makes the regeneration very energy intensive and costly.To address the issue,solid porous adsorbents have emerged as the promising alternative owing to their much lower heat capacity.