Enabling fluorinated MOF-based membranes for simultaneous removal of H2S and CO2 from natural gas

Abstract
Membrane-based gas separations are energy efficient processes; however, major challenges remain to develop high-performance membranes enabling replacement of conventional separation processes. Here, a new fluorinated MOF-based mixed-matrix membrane is reported, which is formed by incorporating the MOF crystals into selected polymers via a facile mixed-matrix approach. By finely controlling the molecular transport in the channels through MOF apertures and at the MOF-polymer interfaces, the resulting fluorinated MOF-based membranes exhibit excellent molecular sieving properties. We show that these materials significantly outperform state-of-the-art membranes for simultaneous removal of H2S and CO2 from natural gas—a challenging and economically-important application. The robust fluorinated MOFs, with tunable channel apertures provided by tuning the metal pillars and/or organic linker, pave a new avenue to efficient membrane separation processes that require precise discrimination of closely sized molecules.

Citation
Liu G, Cadiau A, Liu Y, Adil K, Chernikova V, et al. (2018) Enabling fluorinated MOF-based membranes for simultaneous removal of H2S and CO2 from natural gas. Angewandte Chemie International Edition. Available: http://dx.doi.org/10.1002/anie.201808991.

Acknowledgements
The work was supported by KAUST CRG Research Grant URF/1/2222-01; A.C., I.-D.C., K.A., Y.B., M.K., O.S. and M.E. acknowledge the support from King Abdullah University of Science and Technology; G.L. acknowledges the support from National Natural Science Foundation of China (Grant Nos.: 21776125, 21490585).

Publisher
Wiley

Journal
Angewandte Chemie

DOI
10.1002/anie.201808991
10.1002/ange.201808991

Additional Links
https://onlinelibrary.wiley.com/doi/abs/10.1002/anie.201808991

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