期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 17, 期 32, 页码 8832-8840出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201100958
关键词
alkanes; alkenes; metal-organic frameworks; separation; ZIF-7
资金
- EOS-LT Consortium Anorganische Membraan Technologie (Lange termijn EOS-onderzoeksprogramma's) program [EOSLT-04008]
- European Community [229183]
- Netherlands National Science Foundation
C2 and C3 alkanes are selectively adsorbed from mixtures over the corresponding alkenes on the zeolite imidazolate framework ZIF-7 through a gate-opening mechanism. As a result, the direct production of the pure alkene upon adsorption and the pure alkane upon desorption in packed columns is possible. Herein, a detailed investigation of the step-wise adsorption and separation of alkanes and alkenes is presented, together with a rigorous performance assessment. A molecular picture of the gate-opening mechanism underlying the unprecedented selectivity towards alkane adsorption is proposed based on DFT calculations and a thermodynamic analysis of the adsorption-desorption isotherms.
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