Solid amine adsorbents are showing promise as effective adsorbents for the capture of CO from various gas mixtures, including biogas and flue exhaust gas. In this study, we introduced a co-grafting strategy using 1,4-butanediol diglycidyl ether (BDDE) on the surface of P(DVB-D). This approach aimed to exploit the reaction involving the opening of epoxy groups with amine groups, forming covalent bonds between polyethyleneimine (PEI) and mesoporous organic polymers, along with the introduction of hydroxy groups to enhance adsorbent long-term stability and antioxidation ability. After an extensive assessment, P(DVB-D)@B-41.2 %PEI exhibited a maximum CO capture capacity of 4.53 mmol/g at 50 °C and 50 % RH. Notably, its remarkable CO adsorption performance persisted across a diverse temperature spectrum (30–90 °C) and an extensive concentration span (5–30 % vol.). In contrast to conventional adsorbents prepared solely through impregnation methods, P(DVB-D)@B-41.2 %PEI exhibited impressive long-term stability throughout 50 successive cycles and excellent resistance to oxidative degradation. These findings underscore the considerable potential of P(DVB-D)@B-41.2 %PEI in the realm of carbon capture and sequestration (CCS) technology.

中文翻译：

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聚乙烯亚胺共接枝到易于合成的介孔 P(DVB-D) 上，可高效吸附 CO2 并增强抗氧化性

固体胺吸附剂有望成为从各种气体混合物（包括沼气和烟道废气）中捕获二氧化碳的有效吸附剂。在这项研究中，我们引入了一种在 P(DVB-D) 表面使用 1,4-丁二醇二缩水甘油醚 (BDDE) 的共接枝策略。该方法旨在利用环氧基与胺基开环反应，在聚乙烯亚胺（PEI）和介孔有机聚合物之间形成共价键，并引入羟基以增强吸附剂的长期稳定性和抗氧化能力。经过广泛的评估，P(DVB-D)@B-41.2 %PEI 在 50 °C 和 50 % RH 下表现出 4.53 mmol/g 的最大 CO 捕获能力。值得注意的是，其卓越的 CO 吸附性能在不同的温度范围 (30–90 °C) 和广泛的浓度范围 (5–30 % vol.) 中持续存在。与仅通过浸渍方法制备的传统吸附剂相比，P(DVB-D)@B-41.2 %PEI 在 50 个连续循环中表现出令人印象深刻的长期稳定性和出色的抗氧化降解性。这些发现强调了 P(DVB-D)@B-41.2 %PEI 在碳捕获和封存 (CCS) 技术领域的巨大潜力。