author = {Niu, Zheng and Cui, Xili and Pham, Tony and Lan, Pui Ching and Xing, Huabin and Forrest, Katherine A. and Wojtas, Lukasz and Space, Brian and Ma, Shengqian},
title = {A Metal–Organic Framework Based Methane Nano-trap for the Capture of Coal-Mine Methane},
journal = {Angewandte Chemie International Edition},
volume = {58},
number = {30},
pages = {10138-10141},
keywords = {coal-mine methane, cooperative effect, gas separation, metal–organic frameworks, nano-traps},
doi = {10.1002/anie.201904507},
url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/anie.201904507},
eprint = {https://onlinelibrary.wiley.com/doi/pdf/10.1002/anie.201904507},
abstract = {Abstract As a major greenhouse gas, methane, which is directly vented from the coal-mine to the atmosphere, has not yet drawn sufficient attention. To address this problem, we report a methane nano-trap that features oppositely adjacent open metal sites and dense alkyl groups in a metal–organic framework (MOF). The alkyl MOF-based methane nano-trap exhibits a record-high methane uptake and CH4/N2 selectivity at 298 K and 1 bar. The methane molecules trapped within the alkyl MOF were crystalographically identified by single-crystal X-ray diffraction experiments, which in combination with molecular simulation studies unveiled the methane adsorption mechanism within the MOF-based nano-trap. The IAST calculations and the breakthrough experiments revealed that the alkyl MOF-based methane nano-trap is a new benchmark for CH4/N2 separation, thereby providing a new perspective for capturing methane from coal-mine methane to recover fuel and reduce greenhouse gas emissions.},