Synthesis of Mg-MOF-۷۴ at ambient temperature and its use in Mg-MOF-۷۴/polyurethane mixed matrix membrane for gas separation

In the current study, Mg-MOF-۷۴ crystals were synthesized and characterized at ambient temperature as aprecursor for the development of mixed-matrix membranes (MMMs) with a polymer matrix for efficientCO۲/N۲ separation. The primary objective was to incorporate these Mg-MOF-۷۴ crystals into a polyurethanematrix to fabricate dense MMMs using a solvent casting technique. To evaluate their gas separationcapabilities, CO۲ and N۲ permeability tests were conducted at a controlled pressure of ۴ bar, maintainingsteady-state conditions.The gas permeability results revealed an enhancement in CO۲ permeability with theincrease in MOF loading up to a threshold of ۵ wt%, beyond which a decline was observed in the ۱۰ wt%membrane. Conversely, the CO۲/N۲ selectivity displayed a negative correlation with MOF content,indicating the exceptional adsorptive selectivity of Mg-MOF-۷۴ towards CO۲ molecules.

کلیدواژه ها:

Polymer Membranes ، Gas separation ، Polyurethane ، Mixed matrix membranes ، Metalorganic frameworks