Mixed Matrix CO2 Separation Membranes based on Polysulfone with Cu-BTC Metal-Organic Framework and Poly(ethylene glycol)-grafted-Carbon Nanotubes

7 Pages Posted: 9 Apr 2021

See all articles by Swati Singh

Swati Singh

Khalifa University of Science and Technology - Department of Chemical Engineering

Anish Varghese

Khalifa University of Science and Technology - Department of Chemical Engineering

Georgios Karanikolos

Khalifa University of Science and Technology - Department of Chemical Engineering

Date Written: February 15, 2021

Abstract

Mixed matrix membranes (MMMs) are heterogeneous membranes comprised of inorganic fillers distributed in a polymer matrix, and have been receiving considerable attention in gas separation. The objective is to take advantage of the benefits provided by each phase that can include high selectivity and permeability due to the inorganic fillers, economical processability of the polymers, and enhanced mechanical properties. Yet, the advancement of MMMs is mostly challenged by the fabrication of defect-free membranes, the proper filler dispersion, and the selectivity/permeability trade-off.

In this work, we have developed polysulfone (PSF) MMMs by exploring two different fillers, namely, Cu-BTC (HKUST-1) metal-organic framework and polyethylene glycol-grafted-carbon nanotubes (PEG-g-CNTs) via solvent casting. Following morphological and structural characterization of the developed PSF/HKUST-1 and PSF/PEG-g-CNTs membranes, their CO2 separation performance was evaluated in a gas permeation rig in terms of permeance and selectivity for three different gases, namely, CO2, CH4 and N2 at 2.5 bar and room temperature. Indicatively, an increase in CO2 permeance by 23% was obtained for the MMM containing 10 wt% of HKUST-1, while for the one loaded with 10 wt% of PEG-g-CNT, an increase in CO2 permeance by 35% was observed.

Keywords: MOFs, CNTs, membrane, polymer, carbon dioxide, gas separation

Suggested Citation

Singh, Swati and Varghese, Anish and Karanikolos, Georgios, Mixed Matrix CO2 Separation Membranes based on Polysulfone with Cu-BTC Metal-Organic Framework and Poly(ethylene glycol)-grafted-Carbon Nanotubes (February 15, 2021). Proceedings of the 15th Greenhouse Gas Control Technologies Conference 15-18 March 2021, Available at SSRN: https://ssrn.com/abstract=3821350 or http://dx.doi.org/10.2139/ssrn.3821350

Swati Singh

Khalifa University of Science and Technology - Department of Chemical Engineering ( email )

Abu Dhabi
United Arab Emirates

Anish Varghese

Khalifa University of Science and Technology - Department of Chemical Engineering ( email )

Abu Dhabi
United Arab Emirates

Georgios Karanikolos (Contact Author)

Khalifa University of Science and Technology - Department of Chemical Engineering ( email )

Abu Dhabi
United Arab Emirates

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