Abstract Post-combustion CO2 capture from large point sources has been proposed as a promising technology to prevent growth of the level of atmospheric CO2 and thus restrict the progress of global warming. However, CO2 capture technology is economically unfeasible at present due to the high cost and large energy penalty. Therefore, the development of cost-effective CO2 capture technologies has attracted keen interest. Herein, we develop a series of amine-functionalized adsorbents via one-step amine grafting of cost-effective porous polymers containing unreacted chloromethyl groups, which are prepared from five di- or trichloromethyl monomers via Friedel–Crafts alkylation. Among the adsorbents prepared, PTP-DETA possesses the highest CO2 uptake capacity and CO2/N2 selectivity owing to the highest amine loading. In contrast, the highly porous adsorbent PBP-DETA presents the fastest adsorption kinetics but poorest CO2 capture performance. Nevertheless, subsequent breakthrough experiments revealed that all amine-functionalized adsorbents retain attractive CO2 adsorption properties under dynamic flow conditions even in the presence of moisture.

中文翻译：

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在二亚乙基三胺附加多孔有机聚合物中高效捕获二氧化碳：氯甲基单体结构变化的研究

摘要 大点源燃烧后CO2 捕集被认为是一种有前景的技术，可以防止大气CO2 水平的增长，从而限制全球变暖的进程。然而，由于成本高、能量损失大，CO2 捕集技术目前在经济上不可行。因此，开发具有成本效益的二氧化碳捕集技术引起了人们的浓厚兴趣。在此，我们通过一步胺接枝含有未反应氯甲基的经济高效的多孔聚合物开发了一系列胺官能化吸附剂，这些聚合物由五种二或三氯甲基单体通过弗里德尔-克拉夫茨烷基化反应制备。在制备的吸附剂中，由于胺负载量最高，PTP-DETA 具有最高的 CO2 吸收能力和 CO2/N2 选择性。相比之下，高度多孔的吸附剂 PBP-DETA 表现出最快的吸附动力学，但最差的 CO2 捕获性能。然而，随后的突破性实验表明，即使在存在水分的情况下，所有胺官能化吸附剂在动态流动条件下仍保持有吸引力的 CO2 吸附特性。