Understanding the anomalous Alkane selectivity of ZIF-7 in the separation of light alkane/alkene mixtures

J.B. Bergh, van den, C. Gücüyener, E.A. Pidko, E.J.M. Hensen, J. Gascon, F. Kapteijn

Research output: Contribution to journalArticleAcademicpeer-review

208 Citations (Scopus)

Abstract

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.
Original languageEnglish
Pages (from-to)8832-8840
Number of pages9
JournalChemistry : A European Journal
Volume17
Issue number32
DOIs
Publication statusPublished - 2011

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