Matrimid mixed matrix membranes for enhanced CO2/CH4 separation

Abstract

Abstract In this study, Matrimid mixed matrix membranes (MMMs) were prepared for CO2/CH4 separation. MMMs were fabricated for improving the permeability and ideal selectivity of Matrimid membranes. Matrimid 5218 was used as a polymer matrix, and inorganic particles were used as additives. MMMs with a thickness of 33–38 μm were prepared at room temperature. The effects of the types and different amounts of additives on the permeability and ideal selectivity of MMMs were investigated by using a gas separation membrane unit. Scanning electron microscopy and atomic force microscopy images were used for checking the dispersion and agglomeration of additives within polymer matrices. Thermal gravimetric analysis showed that MMMs became much more thermally stable than pristine membranes. The decomposition temperatures (Td) of MMMs were increased as compared to those of pristine membranes. The results of Fourier transform infrared spectroscopy analysis of MMMs and pristine membranes were recorded. The tensile strength of MMMs and pristine membranes was studied, and the results indicated that MMMs had higher values of tensile strength compared to pristine membranes.