This thesis investigates the performance of novel Mixed-Matrix Membranes (MMMs) incorporating Metal-Organic Frameworks (MOFs) molecular sieving properties and amine-based facilitated transport mechanisms for the efficient separation of carbon dioxide (CO2). The experimental work involved the fabrication of MMMs using different MOF loadings and varying membrane thicknesses. Membrane samples were prepared using a combination of polyvinyl alcohol (PVA) and 2-(2-aminoethylamino)ethanol (AEEA), a diamine known for its superior CO2 separation properties, with different MOFs as filler material (ZIF-8, HKUST-1, and UiO-66). Gas permeation experiments were conducted under controlled conditions (40 °C, 90% relative humidity, and CO2/CH4 feed ratios of 50/50), CO2 and CH4 permeabilities were measured, and the selectivity of CO2 over CH4 was calculated.