Metal organic framework mixed matrix membranes for CO₂ separation

Efficient carbon capture and storage (CCS) approaches are needed to significantly reduce CO2 emissions in the atmosphere. The present work focuses on development of polysulfone (PSF) based mixed-matrixmembranes (MMMs) with Metal Organic Frameworks (MOFs), for enhanced CO2 separation. ZIF-8 synthesized using in-situ hydrothermal method, was incorporated as filler in the polymeric PSF matrix using solution casting. The resulting membranes were characterized for their morphology, structure and stability. The MMMs provide flexibility to effectively tune permeance and selectivity towards acid gas removal by tuning the structure-property relationship of polymer and MOF. SEM, XRD, and FTIR results confirmed that the characteristics of the MOF were preserved in the MMM. The BET surface area of ZIF-8 filler was 1318 m²/g. Based on ongoing work, a suitable combination between the PSF with MOF, and functional amines can open the prospect for efficient MMMs integration towards industrial CO₂ capture and separation applications.