Post-modified porous aromatic frameworks for carbon dioxide capture

Abstract

A new method was developed for post-modification of porous aromatic framework-1 (PAF-1) with chloride and then amine groups confirmed by different characterizations such as nuclear magnetic resonance (NMR), X-ray photoelectron spectroscopy (XPS), and Fourier transform infrared spectroscopy (FTIR). Compared to PAF-1, the amine-functionalized PAF-1 (PAF-1-NH₂) exhibits a 50% improvement in carbon dioxide (CO₂) adsorption capacity reaching 42 cm³·g^-1 at room temperature and 1 bar, and the uptakes under CO₂ concentration in air (4 kPa) and flue gas (150 kPa) also greatly increase. The column breakthrough experiments showed that PAF-1-NH₂ can separate CO₂ from a simulated flue gas of CO₂/N₂ (15:85, v/v) indicating its potential applications in post-combustion systems.

Keywords

Post-synthesis / porous frameworks / carbon dioxide capture / PAF-1

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