Incorporating high density of nitrogen and amine sites into a proper porous structure is a major consideration for developing CO2 adsorbents. Herein, a novel triazine carbonyl polymer (TCP) was synthesized via one pot Friedel-Crafts reaction and then was post-synthetically functionalized with polyethylimine (PEI) to develop TCP-PEI. The successful syntheses of TCP and TCP-PEI were verified by various characterizations, including FT-IR, XPS, SEM/EDS, and N2 adsorption isotherms at 77 K. The pristine TCP displayed hierarchical pores and a significantly large BET surface area (1940 m2/g), which verified its propriety of being utilized as a support for PEI functionalization. As reasoned, TCP-PEI showed significantly stronger CO2 adsorption than the pristine TCP because of the special interaction between CO2 and PEI. As a result, TCP-PEI exhibited considerably higher CO2/N2 and CO2/CH4 selectivities than TCP. Moreover, it showed almost identical CO2 adsorption isotherms for 5 consecutive cycles. Developing covalent porous polymers with both triazine and carbonyl groups and follow-up PEI functionalization would be an efficient strategy for developing CO2 adsorbents.
|Number of pages||7|
|Journal||Journal of Industrial and Engineering Chemistry|
|Publication status||Published - 2022 Apr 25|
Bibliographical noteFunding Information:
This work was supported by National Research Foundation of Korea (NRF) grants funded by the Korean government (MSIT) (No. 2021R1I1A1A01058669, 2020K1A4A7A02095371, No. 2020R1A5A1019131). This work was also supported by Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korean government (MOTIE) (No. 20198550000920) and Korea Institute of Construction Technology (No. 20200547-001).
© 2022 The Korean Society of Industrial and Engineering Chemistry
All Science Journal Classification (ASJC) codes
- Chemical Engineering(all)