Abdelnaby Mahmoud M, Aliyu Mansur, Nemitallah Medhat A, Alloush Ahmed M, Mahmoud El-Hassan M, Ossoss Khaled M, Zeama Mostafa, Dowaidar Moataz
Interdisciplinary Research Center for Hydrogen and Energy Storage (IRC-HES), King Fahd University of Petroleum and Minerals (KFUPM), Dhahran 31261, Saudi Arabia.
Aerospace Engineering Department, King Fahd University of Petroleum and Minerals (KFUPM), Dhahran 31261, Saudi Arabia.
Polymers (Basel). 2023 May 27;15(11):2475. doi: 10.3390/polym15112475.
The design of novel porous solid sorbents for carbon dioxide capture is critical in developing carbon capture and storage technology (CCS). We have synthesized a series of nitrogen-rich porous organic polymers (POPs) from crosslinking melamine and pyrrole monomers. The final polymer's nitrogen content was tuned by varying the melamine ratio compared to pyrrole. The resulting polymers were then pyrolyzed at 700 °C and 900 °C to produce high surface area nitrogen-doped porous carbons (NPCs) with different N/C ratios. The resulting NPCs showed good BET surface areas reaching 900 m g. Owing to the nitrogen-enriched skeleton and the micropore nature of the prepared NPCs, they exhibited CO uptake capacities as high as 60 cm g at 273 K and 1 bar with significant CO/N selectivity. The materials showed excellent and stable performance over five adsorption/desorption cycles in the dynamic separation of the ternary mixture of N/CO/HO. The method developed in this work and the synthesized NPCs' performance towards CO capture highlight the unique properties of POPs as precursors for synthesizing nitrogen-doped porous carbons with a high nitrogen content and high yield.
设计用于二氧化碳捕集的新型多孔固体吸附剂对于开发碳捕集与封存技术（CCS）至关重要。我们通过交联三聚氰胺和吡咯单体合成了一系列富氮多孔有机聚合物（POPs）。通过改变三聚氰胺与吡咯的比例来调节最终聚合物的氮含量。然后将所得聚合物在700℃和900℃下热解，以制备具有不同N/C比的高比表面积氮掺杂多孔碳（NPCs）。所得的NPCs表现出良好的BET比表面积，达到900 m²/g。由于所制备的NPCs具有富氮骨架和微孔性质，它们在273 K和1 bar下表现出高达60 cm³/g的CO吸附容量，并具有显著的CO/N₂选择性。在N₂/CO₂/H₂O三元混合物的动态分离中，这些材料在五个吸附/解吸循环中表现出优异且稳定的性能。这项工作中开发的方法以及合成的NPCs对CO₂捕集的性能突出了POPs作为合成高氮含量和高收率氮掺杂多孔碳前驱体的独特性质。
