Fabrication of a Nitrogen-Rich Porous Polymer Network with Dense Polytriazine and Polytetrazine for CO 2 Capture

作者：Yao Jiang, Dongdong Zheng, Kang Wang, Mingming Xu, Qi Wang, Peng Cui, Lin‐Bing Sun · 发表于：Industrial & Engineering Chemistry Research · 年份：2025 · DOI：10.1021/acs.iecr.4c04984 · 被引用次数：6 · 研究领域：Covalent Organic Framework Applications、Membrane Separation and Gas Transport、Metal-Organic Frameworks: Synthesis and Applications

Porous polymer networks are considered potential candidates for CO 2 capture, owing to their well-developed porosity and high stability. However, their further application is limited by the relatively low selectivity and unsatisfactory adsorption capacity. In this study, we fabricated a nitrogen-rich porous polymer network, denoted as NRPPN-1, with dense polytriazine and polytetrazine by polymerization of two monomers of melamine and 3,6-dichloro-1,2,4,5-tetrazine. The resulting NRPPN-1 exhibits an abundance of micropores and a high surface area of 668 m 2 ·g –1 . Experimental results demonstrate that NRPPN-1 has excellent CO 2 adsorption capacity (181.2 mg·g –1 ) and adsorption selectivity (306.4) at 273 K and 100 kPa for CO 2 /N 2 mixtures, which are corroborated by adsorption potential and breakthrough curve analysis. Moreover, computational simulations reveal that the abundant nitrogen-rich active sites in NRPPN-1 induce strong C···N interactions, which are responsible for the promoted selective capture of CO 2 from CO 2 /N 2 mixtures. The novel nitrogen-rich porous polymer network may serve as a promising candidate for the capture of CO 2 from flue gas.