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Microporous metal-organic framework with open metal sites and π-Lewis acidic pore surfaces for recovering ethylene from polyethylene off-gas

Abstract

It is an urgent demand to recover ethylene (C2H4) from polyethylene off-gas since it opens up for more efficient conversion of the monomers with high economic value. Here we report a three-dimensional (3D) porous MOF [Cu2(L)(H2O)2]·5DMF·dioxane·3H2O (FJU-101, H4L = N,N′-bis(5-isophthalic acid)naphthalenediimide, DMF = N,N′-Dimethylformamide) with π-Lewis acidic pore surfaces and superior gas storage/separation performance. Under ambient conditions, the activated FJU-101a exhibits a high C2H4 uptake of 142 cm3(STP)/g, and, more importantly, the dynamic fixed-bed breakthrough test indicates that the recovery of C2H4 from simulated polyethylene off-gas through a column packed with FJU-101a adsorbent can be efficiently achieved. Such a separation is essential to recycle ethylene for its commercial usage. In addition, FJU-101a also exhibits extraordinarily high gravimetric uptake of CO2 (219.1 cm3/g) at 273 K and 1 bar, which is only slightly lower than the best CO2 adsorption material (MgMOF-74, 230 cm3/g) under similar conditions.

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Publication details

The article was received on 18 Jul 2018, accepted on 01 Oct 2018 and first published on 02 Oct 2018


Article type: Paper
DOI: 10.1039/C8TA06923A
Citation: J. Mater. Chem. A, 2018, Accepted Manuscript
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    Microporous metal-organic framework with open metal sites and π-Lewis acidic pore surfaces for recovering ethylene from polyethylene off-gas

    Y. Ye, Z. Ma, L. Chen, H. Lin, Q. Lin, L. Liu, Z. Li, S. Chen, Z. Zhang and S. Xiang, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C8TA06923A

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