Journal
ADVANCED MATERIALS
Volume 31, Issue 14, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201807513
Keywords
mixed-matrix membranes; MOFs; propylene/propane; separation
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Funding
- KAUST CRG Research Grant [URF/1/2222-01]
- Specialty Separations Center at Georgia Tech
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Membrane-based separation is poised to reduce the operation cost of propylene/propane separation; however, identifying a suitable molecular sieve for membrane development is still an ongoing challenge. Here, the successful identification and use of a metal-organic framework (MOF) material as fillers, namely, the Zr-fum-fcu-MOF possessing an optimal contracted triangular pore-aperture driving the efficient diffusive separation of propylene from propane in mixed-matrix membranes are reported. It is demonstrated that the fabricated hybrid membranes display a high propylene/propane separation performance, far beyond the current trade-off limit of polymer membranes with excellent properties under industrial conditions. Most importantly, the mechanism behind the exceptional high propylene/propane selectivity is delineated by exploring theoretically the efficiency of sieving of different conformers of propane through the hypothesized triangular rigid pore-aperture of Zr-fum-fcu-MOF.
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