Aliyev Elvin, Emmler Thomas, Lillepaerg Jelena, Shishatskiy Sergey, Dizge Nadir, Filiz Volkan
Institute of Membrane Research, Helmholtz-Zentrum Hereon, Max-Planck Str. 1, 21502 Geesthacht, Germany.
Department of Environmental Engineering, Mersin University, 33343 Mersin, Turkey.
ACS Omega. 2024 Mar 22;9(13):15282-15293. doi: 10.1021/acsomega.3c09042. eCollection 2024 Apr 2.
This paper illustrates the gas adsorption properties of newly synthesized nanoporous cross-linked polymer networks (CPNs). All synthesized CPNs possess N-rich functional groups and are used for the utilization of carbon dioxide and methane. Good gas adsorption and selectivities are obtained for all of the samples. Among the materials, HEREON2 outperforms better selectivity for methane separation from nitrogen rather than zeolites, activated carbons, molecular sieves, covalent organic frameworks, and metal-organic frameworks (MOFs). The accessibility of the N-rich functionalities makes these materials potential candidates for the separation of hydrocarbons increased polarizabilities. High-pressure adsorption experiments showed that the synthesized two-dimensional nanoporous materials also have a high affinity toward carbon dioxide. HEREON2 powders showed an increased experimental CO/N selectivity of ∼25,000 at 50 bar due to the presence of nitrogen groups in the structure. Fourier-transform infrared spectroscopy (FTIR), solid-state NMR, X-ray diffraction, thermogravimetric analysis, energy-dispersive X-ray spectroscopy (EDX), transmission electron microscopy (TEM), and scanning electron microscopy (SEM) were applied for the characterization of the synthesized nanoporous CPNs. The results show a potential new pathway for future CPN membrane development.
本文阐述了新合成的纳米多孔交联聚合物网络（CPNs）的气体吸附特性。所有合成的CPNs都含有富氮官能团，并用于二氧化碳和甲烷的利用。所有样品都获得了良好的气体吸附性能和选择性。在这些材料中，HEREON2在从氮气中分离甲烷方面表现出比沸石、活性炭、分子筛、共价有机框架和金属有机框架（MOF）更好的选择性。富氮官能团的可及性使这些材料成为分离具有较高极化率的碳氢化合物的潜在候选材料。高压吸附实验表明，合成的二维纳米多孔材料对二氧化碳也具有高亲和力。由于结构中存在氮基团，HEREON2粉末在50巴时的实验CO/N选择性提高到约25,000。采用傅里叶变换红外光谱（FTIR）、固态核磁共振、X射线衍射、热重分析、能量色散X射线光谱（EDX）、透射电子显微镜（TEM）和扫描电子显微镜（SEM）对合成的纳米多孔CPNs进行了表征。结果为未来CPN膜的开发展示了一条潜在的新途径。
