Oxidation-stable amine-containing adsorbents for carbon dioxide capture
Amine-containing solids have been investigated as promising adsorbents for CO capture, but the low oxidative stability of amines has been the biggest hurdle for their practical applications. Here, we developed an extra-stable adsorbent by combining two strategies. First, poly(ethyleneimine) (PEI) wa...
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Published in | Nature communications Vol. 9; no. 1; pp. 726 - 7 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
England
Nature Publishing Group
20.02.2018
Nature Publishing Group UK Nature Portfolio |
Subjects | |
Online Access | Get full text |
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Summary: | Amine-containing solids have been investigated as promising adsorbents for CO
capture, but the low oxidative stability of amines has been the biggest hurdle for their practical applications. Here, we developed an extra-stable adsorbent by combining two strategies. First, poly(ethyleneimine) (PEI) was functionalized with 1,2-epoxybutane, which generates tethered 2-hydroxybutyl groups. Second, chelators were pre-supported onto a silica support to poison p.p.m.-level metal impurities (Fe and Cu) that catalyse amine oxidation. The combination of these strategies led to remarkable synergy, and the resultant adsorbent showed a minor loss of CO
working capacity (8.5%) even after 30 days aging in O
-containing flue gas at 110 °C. This corresponds to a ~50 times slower deactivation rate than a conventional PEI/silica, which shows a complete loss of CO
uptake capacity after the same treatment. The unprecedentedly high oxidative stability may represent an important breakthrough for the commercial implementation of these adsorbents. |
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ISSN: | 2041-1723 2041-1723 |
DOI: | 10.1038/s41467-018-03123-0 |