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Self-supported fibrous porous aromatic membranes for efficient CO2/N2 separations
Lingbo Meng1, Xiaoqin Zou1, Shukun Guo
1‡Faculty of Chemistry, Northeast Normal University, Changchun 130024, P. R. China.
ACS Applied Materials & Interfaces
|June 30, 2015
Summary
We developed novel porous aromatic framework (PAF-56P) and polysulfone (PSF) hollow fiber membranes for efficient carbon dioxide (CO2) capture. These membranes demonstrate high CO2 selectivity and stability, making them promising for industrial gas separations.
Area of Science:
- Materials Science
- Chemical Engineering
- Environmental Science
Background:
- Developing advanced membrane materials is crucial for efficient carbon capture technologies.
- Porous Aromatic Frameworks (PAFs) offer tunable porosity and surface area for gas adsorption.
- Polysulfone (PSF) is a common polymer matrix for membrane fabrication.
Purpose of the Study:
- To synthesize a novel porous aromatic framework, PAF-56P.
- To fabricate self-supported hollow fiber membranes integrating PAF-56P with PSF.
- To evaluate the performance of these membranes for CO2 capture from gas mixtures.
Main Methods:
- PAF-56P synthesis via cross-coupling of cyanuric chloride and p-terophenyl monomers.
- Fabrication of PAF-56P/PSF hollow fiber membranes using a dry jet-wet quench method.
- Characterization using NMR, IR, BET surface area analysis, SEM, and gas separation tests.
Main Results:
- PAF-56P exhibited permanent porosity (553.4 m²/g BET) and a 1.2 nm pore size.
- PAF-56P/PSF membranes showed high CO2/N2 selectivity (38.9) and CO2 permeance (93-141 GPU).
- The membranes demonstrated excellent thermal and mechanical stability.
Conclusions:
- The novel PAF-56P/PSF hollow fiber membranes are effective for CO2 capture.
- The high selectivity and stability make them suitable for industrial CO2 separation from exhaust gases.
- The facile synthesis and scale-up potential are advantageous for practical applications.
