期刊
ADVANCED MATERIALS
卷 30, 期 49, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201805088
关键词
adsorbents; adsorptive separation; metal-organic frameworks; molecular sieving; olefin/paraffin separation
类别
资金
- Materials Sciences and Engineering Division, Office of Basic Research Energy Sciences of the U.S. Department of Energy [DE-FG02-08ER-46491]
- Micromeritics Instrument Corp.
- University of Milan
Adsorptive separation of olefin/paraffin mixtures by porous solids can greatly reduce the energy consumption associated with the currently employed cryogenic distillation technique. Here, the complete separation of propane and propylene by a designer microporous metal-organic framework material is reported. The compound, Y-6(OH)(8)(abtc)(3)(H2O)(6)(DMA)(2) (Y-abtc, abtc = 3,3',5,5'-azobenzene-tetracarboxylates; DMA = dimethylammonium), is rationally designed through topology-guided replacement of inorganic building units. Y-abtc is both thermally and hydrothermally robust, and possesses optimal pore window size for propane/propylene separation. It adsorbs propylene with fast kinetics under ambient temperature and pressure, but fully excludes propane, as a result of selective size exclusion. Multicomponent column breakthrough experiments confirm that polymer-grade propylene (99.5%) can be obtained by this process, demonstrating its true potential as an alternative sorbent for efficient separation of propane/propylene mixtures.
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