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Issue 8, 2015
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Porous metal–organic frameworks with Lewis basic nitrogen sites for high-capacity methane storage

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Abstract

The use of porous materials to store/deliver natural gas (mostly methane) in vehicles requires large amounts of methane being stored per unit volume. In this work, we report several porous metal–organic frameworks (MOFs) with NOTT-101 type structures, containing Lewis basic nitrogen sites through the incorporation of pyridine, pyridazine, and pyrimidine groups into the organic linkers. They exhibit significantly higher total volumetric methane storage capacities (∼249–257 cm3 (STP) cm−3 at room temperature (RT) and 65 bar) than NOTT-101a (here the MOF abbreviation with “a” at the end represents the fully activated MOF). The most significant enhancement was observed on UTSA-76a with functional pyrimidine groups (237 cm3 (STP) cm−3 in NOTT-101a vs. 257 cm3 (STP) cm−3 in UTSA-76a). Several multivariate (MTV) MOFs constructed from two types of organic linkers (pyrimidine-functionalized and unfunctionalized) also show systematically improved methane storage capacities with increasing percentage of functionalized organic linkers. The immobilized functional groups have nearly no effect on the methane uptakes at 5 bar but significantly improve the methane storage capacities at 65 bar, so the reported MOFs exhibit excellent methane storage working capacities of ∼188–197 cm3 (STP) cm−3.

Graphical abstract: Porous metal–organic frameworks with Lewis basic nitrogen sites for high-capacity methane storage

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Publication details

The article was received on 17 May 2015, accepted on 02 Jul 2015 and first published on 03 Jul 2015


Article type: Paper
DOI: 10.1039/C5EE01531F
Citation: Energy Environ. Sci., 2015,8, 2504-2511
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    Porous metal–organic frameworks with Lewis basic nitrogen sites for high-capacity methane storage

    B. Li, H. Wen, H. Wang, H. Wu, T. Yildirim, W. Zhou and B. Chen, Energy Environ. Sci., 2015, 8, 2504
    DOI: 10.1039/C5EE01531F

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