NDLI: A perfluorinated covalent triazine-based framework for highly selective and water

Content Provider	Royal Society of Chemistry (RSC)
Author	Teng, Baiyang Yao, Ke Xin Zhao, Yunfeng Zhang, Tong Han, Yu
Copyright Year	2013
Abstract	We designed and synthesized a perfluorinated covalent triazine-based framework (FCTF-1) for selective CO2 capture. The incorporation of fluorine (F) groups played multiple roles in improving the framework's CO2 adsorption and separation capabilities. Thermodynamically, the strongly polar C–F bonds promoted CO2 adsorption via electrostatic interactions, especially at low pressures. FCTF-1's CO2 uptake was 1.76 mmol g−1 at 273 K and 0.1 bar through equilibrium adsorption, exceeding the CO2 adsorption capacity of any reported porous organic polymers to date. In addition, incorporating F groups produced a significant amount of ultra-micropores (<0.5 nm), which offered not only high gas adsorption potential but also kinetic selectivity for CO2–N2 separation. In mixed-gas breakthrough experiments, FCTF-1 exhibited an exceptional CO2–N2 selectivity of 77 under kinetic flow conditions, much higher than the selectivity (31) predicted from single-gas equilibrium adsorption data. Moreover, FCTF-1 proved to be tolerant to water and its CO2 capture performance remained excellent when there was moisture in the gas mixture, due to the hydrophobic nature of the C–F bonds. In addition, the moderate adsorbate–adsorbent interaction allowed it to be fully regenerated by pressure swing adsorption processes. These attributes make FCTF-1 a promising sorbent for CO2 capture from flue gas.
Starting Page	3684
Ending Page	3692
Page Count	9
File Format	HTM / HTML PDF
ISSN	17545692
Volume Number	6
Issue Number	12
Journal	Energy & Environmental Science
DOI	10.1039/c3ee42548g
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Covalent bond Fluorine Adsorption Hydrophobe Pressure swing adsorption Flue gas
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Pollution Renewable Energy, Sustainability and the Environment Nuclear Energy and Engineering

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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