Impact on CO2/N2 and CO2/CH4 Separation Performance Using Cu-BTC with Supported Ionic Liquids-Based Mixed Matrix Membranes


The efficient separation of gases has industrial, economic, and environmental importance. Here, we report the improvement in gas separation performance of a polyimide-based matrix (Matrimid®5218) filled with a Cu-based metal organic framework [MOF, Cu3(BTC)2] with two different ionic liquids (ILs) confined within the pores. The chosen ILs are commonly used in gas solubilization, 1-ethyl-3-methylimidazolium tetrafluoroborate ([EMIM][BF4]) and 1-Ethyl-3-methylimidazolium trifluoromethanesulfonate ([EMIM][OTf]), and the incorporation of the [EMIM][BF4]@Cu-BTC and [EMIM][OTf]@Cu-BTC composites in Matrimid®5218 proved to be an efficient strategy to improve the permeability and selectivity toward CO2/N2 and CO2/CH4 mixtures.


Bernardo Monteiro, Ana R. Nabais, Maria H. Casimiro, Ana P. S. Martins, Rute O. Francisco, Luísa A. Neves and Cláudia C. L. Pereira


Paper


Mixed matrix membranes; metal–organic frameworks; ionic liquids; gas separation; Cu3(BTC)2; IL@Cu3(BTC)2; IL@MOF


10.3390/membranes8040093


11/10/2018


https://www.mdpi.com/2077-0375/8/4/93

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