Conformation-Controlled Molecular Sieving Effects for Membrane-Based Propylene/Propane Separation

被引:126
作者
Liu, Yang [1 ]
Chen, Zhijie [2 ]
Liu, Gongping [1 ]
Belmabkhout, Youssef [2 ]
Adil, Karim [2 ]
Eddaoudi, Mohamed [2 ]
Koros, William [1 ]
机构
[1] Georgia Inst Technol, Sch Chem & Biomol Engn, 311 Ferst Dr, Atlanta, GA 30332 USA
[2] King Abdullah Univ Sci & Technol, Adv Membranes & Porous Mat Ctr, Div Phys Sci & Engn, Thuwal 239556900, Saudi Arabia
关键词
mixed-matrix membranes; MOFs; propylene/propane; separation; METAL-ORGANIC FRAMEWORKS; MIXED MATRIX MEMBRANES; POLYIMIDE; PERFORMANCE;
D O I
10.1002/adma.201807513
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
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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页数:7
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