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<p>This study focussed on improving CO<sub>2</sub> capture using semi-crystalline PAN polymer membranes modified with polyethyleneimine (PEI) and incorporated with nanoparticles (MWCNT, SiO<sub>2</sub>, Al<sub>2</sub>O<sub>3</sub>). The process involved electrospinning to produce continuous nanofiber membranes from the modified polymers and nanoparticle-infused polymers. The membranes were characterized using techniques such as FTIR, SEM, TGA, XRD, and EDS. Permeation tests revealed enhanced CO<sub>2</sub> permeability with higher nanoparticle content. The best performance was observed with PAN-PEI with 40&#xa0;wt.% PEI, achieving a CO<sub>2</sub> permeability of 509.4 Barrer and CO<sub>2</sub>/N<sub>2</sub> selectivity of 7.4. Adding 4&#xa0;wt.% MWCNTs with PAN-40&#xa0;wt.% PEI further increased CO<sub>2</sub> permeability to 717.2 Barrer and selectivity to 7.7. A 7 wt.% infusion of SiO<sub>2</sub> resulted in a CO<sub>2</sub> permeability of 713.5 Barrer and selectivity of 8.6. The highest performance was achieved with 7 wt.% Al<sub>2</sub>O<sub>3</sub>, resulting in a CO<sub>2</sub> permeability of 849 Barrer and selectivity of 9.6. Mathematical models, including the resistance model approach (RMA) and the effective medium approach (EMA), were used to validate the experimental findings, confirming the effectiveness of infusing the nanoparticles with PAN-PEI membranes for CO<sub>2</sub> separation. These results suggest that the modified PAN-PEI nanocomposite membranes could offer a promising solution for carbon capture and storage (CCS) application.</p>

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Characterizing CO2 Permeation Properties of PEI-Modified PAN Nanocomposites Membrane Using Experimental and Mathematical Modelling Approaches

  • 期刊论文

  • 发表日期：

    2025年5月29日

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  • Dirar Aletan,
  • S. D. Jacob Muthu,
  • Ezeddin Shirif

摘要

This study focussed on improving CO2 capture using semi-crystalline PAN polymer membranes modified with polyethyleneimine (PEI) and incorporated with nanoparticles (MWCNT, SiO2, Al2O3). The process involved electrospinning to produce continuous nanofiber membranes from the modified polymers and nanoparticle-infused polymers. The membranes were characterized using techniques such as FTIR, SEM, TGA, XRD, and EDS. Permeation tests revealed enhanced CO2 permeability with higher nanoparticle content. The best performance was observed with PAN-PEI with 40 wt.% PEI, achieving a CO2 permeability of 509.4 Barrer and CO2/N2 selectivity of 7.4. Adding 4 wt.% MWCNTs with PAN-40 wt.% PEI further increased CO2 permeability to 717.2 Barrer and selectivity to 7.7. A 7 wt.% infusion of SiO2 resulted in a CO2 permeability of 713.5 Barrer and selectivity of 8.6. The highest performance was achieved with 7 wt.% Al2O3, resulting in a CO2 permeability of 849 Barrer and selectivity of 9.6. Mathematical models, including the resistance model approach (RMA) and the effective medium approach (EMA), were used to validate the experimental findings, confirming the effectiveness of infusing the nanoparticles with PAN-PEI membranes for CO2 separation. These results suggest that the modified PAN-PEI nanocomposite membranes could offer a promising solution for carbon capture and storage (CCS) application.