期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 57, 期 47, 页码 15354-15358出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201807935
关键词
membranes; polydopamine modification; pervaporation; separation; xylene isomers
资金
- National Natural Science Foundation of China [21761132003, 21576273]
- National University of Singapore [R-279-000-474-112, R-261-508-001-646/733]
- DFG [Ca147/11-3]
Separation of p-xylene (kinetic diameter ca. 0.58 nm) from its bulkier isomers (o-xylene and m-xylene, ca. 0.68 nm) is challenging, but important in the petrochemical industry. Herein, we developed a highly selective and stable metal-organic framework (MOF) MIL-160 membrane for selective separation of p-xylene from its isomers by pervaporation. The suitable pore size (0.5 similar to 0.6 nm) of the MIL-160 membrane selectively allows p-xylene to pass through, while excluding the bulkier o-xylene and m-xylene. For the separation of equimolar binary p-/o-xylene mixtures at 75 degrees C, high p-xylene flux of 467 gm(-2) h(-1) and p-/o-xylene selectivity of 38.5 could be achieved. The stability of MIL-160, ensured the separation performance of the MIL-160 membrane was unchanged over a 24h measurement. The high separation performance combined with its high thermal and chemical stability makes the MIL-160 membrane a promising candidate for the separation of xylene isomers.
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