Development of highly permeable and selective mixed matrix membranes based on Pebax®1657 and NOTT-300 for CO2 capture

• Published in: Separation and purification technology Vol. 234; p. 116101
• Main Authors: Habib, Nitasha, Shamair, Zufishan, Tara, Nain, Nizami, Abdul-Sattar, Akhtar, Faheem Hassan, Ahmad, Nasir M., Gilani, Mazhar Amjad, Bilad, Muhammad Roil, Khan, Asim Laeeq
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.03.2020
• Subjects: CO2 capture; Metal-organic framework; Mixed matrix membranes; NOTT-300; Metal-organic framework; CO2 capture; NOTT-300; Mixed matrix membranes
• ISSN: 1383-5866; 1873-3794
• DOI: 10.1016/j.seppur.2019.116101

[Display omitted] •NOTT-300 crystals were synthesized and Pebax® 1657 based MMMs were prepared.•XRD, SEM, and FTIR confirmed the successful synthesis of NOTT-300 crystals.•CO2 permeability of the MMMs was increased by 380%, and CO2/CH4 selectivity up to 68%•NOTT-300 has high porosity and CO2 philic properties with exceptional CO2 capturing. Mixed matrix membranes (MMMs) are a promising alternative to conventional polymeric membranes but suffer from compatibility issues of polymer and filler. This study reports simultaneous improvement in CO2 permeability and selectivity employing novel metal organic frameworks (MOFs), namely NOTT-300 and Pebax®1657 as polymer matrix. MMMs are characterized and investigated for separation of CO2/CH4 and CO2/N2 gas mixtures at ambient and elevated temperatures. Well-dispersed NOTT-300 particles are observed in SEM images of MMMs with no visible defects even at higher loadings. Single and mixed gas permeation results showed their outstanding performance exhibiting a simultaneous upsurge in CO2 permeability and CO2/CH4 and CO2/N2 selectivity. In comparison to neat Pebax®1657 membrane, the incorporation of NOTT-300 at 40% filler loading enhanced the permeability of CO2 by 380%, and selectivity to 68% and 26% for CO2/CH4 and CO2/N2 respectively. The results proved the potential of NOTT-300 as filler material for MMMs aimed at CO2 capture because of their high porosity and CO2 philic properties.