Enhanced CO2CH4 separation using hydroxyl functionalized Mg-MOF-74
Year: 2025
Type: article
Abstract: The separation of carbon dioxide (CO2) from methane (CH4) is crucial for biogas upgrading and natural gas purification. In this study, Mg-MOF-74 was functionalized with 2,5-dihydroxy-1,4-benzenedicarboxylic acid (dobdc), introducing hydroxyl groups that enhance CO2 adsorption through hydrogen bonding and quadrupole interactions. The resulting Mg-MOF-74-dobdc exhibited a remarkable CO2 uptake of 9.12 mmol/g at 25 °C and 1 bar, surpassing unmodified Mg-MOF-74 and other leading adsorbents such as MIL-53(Al) and ZIF-8. This functionalization also significantly improved CO2/CH4 selectivity, exceeding 50 under low-pressure conditions. The synergistic effects of ligand functionalization enhanced adsorption capacity, exceptional selectivity, and operational robustness position Mg-MOF-74-dobdc as a promising benchmark for sustainable CO2 capture in challenging gas separation processes.
Source: Figshare
Authors: Hashmi, Syed Abdul Moiz, Moiz, Hina, Hussain, Waqar, Mumtaz, Minza
Language: English
Subfield: Inorganic Chemistry
Field: Chemistry
Domain: Physical Sciences
SDG: Climate action
Open Access status: green
OpenAlex ID: W6902257418
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