Boosting selective C2H2/CH4, C2H4/CH4 and CO2/CH4 adsorption performance via 1,2,3-triazole functionalized triazine-based porous organic polymers

• Published in: Chinese journal of chemical engineering Vol. 42; no. 2; pp. 64 - 72
• Main Authors: Liu, Xionghui, Du, Jianfeng, Ye, Yu, Liu, Yuchuan, Wang, Shun, Meng, Xianyu, Song, Xiaowei, Liang, Zhiqiang, Yan, Wenfu
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.02.2022; State Key Laboratory of Inorganic Synthesis and Preparative Chemistry,Jilin University,Changchun 130012,China
• Subjects: CO2 capture; Gas separation; Light hydrocarbons; Natural gas purification; Porous organic polymers; Triazole; Triazole; Light hydrocarbons; Gas separation; CO2 capture; Porous organic polymers; Natural gas purification
• ISSN: 1004-9541; 2210-321X
• DOI: 10.1016/j.cjche.2021.09.032

[Display omitted] Nitrogen-rich porous organic polymers have shown great potentials in gas adsorption/separation, photocatalysis, electrochemistry, sensing and so on. Herein, 1,2,3-triazole functionalized triazine-based porous organic polymers (TT-POPs) have been synthesized by the copper-catalyzed azide-alkyne cycloaddition (Cu-AAC) polymerization reactions of 1,3,5-tris(4-azidophenyl)-triazine with 1,4-diacetylene benzene and 1,3,5-triacetylenebenzene, respectively. The characterizations of N2 adsorption at 77 K show TT-POPs possess permanent porosity with BET surface areas of 666 m2·g−1 (TT-POP-1) and 406 m2·g−1 (TT-POP-2). The adsorption capacities of TT-POPs for CO2, CH4, C2H2 and C2H4, as well as the selective separation abilities of CO2/N2, CO2/CH4, C2H2/CH4 and C2H4/CH4 were evaluated. The gas selective separation ratio of TT-POPs was calculated by the ideal adsorbed solution theory (IAST) method, wherein the selective separation ratios of C2H2/CH4 and C2H4/CH4 of TT-POP-2 was 48.4 and 13.6 (298 K, 0.1 MPa), which is comparable to other adsorbents (5.6–120.6 for C2H2/CH4, 10–26 for C2H4/CH4). This work shows that the 1,2,3-triazole functionalized triazine-based porous organic polymer has a good application prospect in natural gas purification.