Abstract
Methane is a greenhouse gas that has been demonstrated to be more harmful than carbon dioxide (CO2) in terms of contributing to global warming, particularly in the first 20 years after its release into the atmosphere and consequently causing global warming. Metal-organic frameworks (MOFs) geometrical and topological properties are significant in influencing their capacity to selectively capture and store methane (CH4). Landfill methane capture and storage by adsorption technique using MOFs as adsorbents has demonstrated some effective and efficient trends in reducing methane emissions from the environment by offering a vast surface area, favourable steric interactions, thermal stability, and hydrophobic pockets. The aim of this study is to synthesize and optimize zinc metal-organic framework (Zn-MOF-5) under various conditions of temperature ranging from (85°C to 100°C), as well as reaction time from 24 hours to 48 hours and test its suitability to selectively capture landfill methane through comprehensively exploring physicochemical properties including the functional groups, crystallinity and thermal stability using Fourier Transform Infrared (FTIR), X-ray Diffraction (XRD) and Thermogravimetric Analysis (TGA). The FTIR findings on Zn-MOF-5 reveal that the material possesses two broad bands C-H stretching vibrations at 2980 and 2871 cm-1 , C=O stretching vibrations at 1658 cm-1 peak linked to Zn 2+ , respectively