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Efficient separation of ethylene from acetylene/ethylene mixtures by a flexible-robust metal–organic framework

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Abstract

During the production of polymer-grade ethylene, trace amounts of acetylene (about 1%) in the ethylene feed need to be reduced to 40 parts per million (ppm). We herein report a metal–organic framework (MOF) of flexible-robust nature for the efficient removal of acetylene from acetylene/ethylene mixture to meet such a challenging separation need. Neutron powder diffraction studies reveal that its specific binding sites and unique pore structure collectively enable this MOF (ELM-12) to efficiently and selectively adsorb acetylene over ethylene under ambient conditions, making it feasible for this challenging separation. The purity of obtained ethylene is over 99.999%, as demonstrated by experimental breakthrough curves of 1/99 acetylene/ethylene mixture.

Graphical abstract: Efficient separation of ethylene from acetylene/ethylene mixtures by a flexible-robust metal–organic framework

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Publication details

The article was received on 28 Jun 2017, accepted on 24 Jul 2017 and first published on 25 Jul 2017


Article type: Paper
DOI: 10.1039/C7TA05598F
Citation: J. Mater. Chem. A, 2017, Advance Article
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    Efficient separation of ethylene from acetylene/ethylene mixtures by a flexible-robust metal–organic framework

    L. Li, R. Lin, R. Krishna, X. Wang, B. Li, H. Wu, J. Li, W. Zhou and B. Chen, J. Mater. Chem. A, 2017, Advance Article , DOI: 10.1039/C7TA05598F

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