Effects of Amine-Functionalization on Mixed Matrix Membranes Encompassing of T-Type Zeolite and 6FDA-based Polyimide for Separation of CO2 from CH4

Abstract

Mixed matrix membranes (MMMs) comprising of unfunctionalized and aminefunctionalized T-type zeolite and 6FDA-based polyimide matrix were formulated. The physicochemical properties of the membranes were examined by FESEM, EDX, TGA and DSC. FESEM images showed that the enhancement of polymer-zeolite adhesion in MMM embedded with amine-functionalized T-type zeolite is trivial in comparison with
MMM loaded with unfunctionalized T-type zeolite. From permeation test, permeability of CO₂ of 858 Barrer and selectivity of CO₂/CH₄ of 22.5 was obtained using MMM incorporated with amine-functionalized T-type zeolite, whereas MMM incorporated with unfunctionalized T-type zeolite displayed permeability of CO₂ of 844 Barrer and selectivity of CO₂/CH₄ of 19.1. Thus, selection of another suitable aminefunctionalization group might be required in later works to further improve MMM performance in capturing CO₂ from CH₄.