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Issue 3, 2015
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Monodentate hydroxide as a super strong yet reversible active site for CO2 capture from high-humidity flue gas

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Abstract

We demonstrate here that porous coordination frameworks, functionalized with monodentate hydroxide on the pore surface, can achieve ultrahigh CO2 adsorption affinity (124 kJ mol−1), adsorption capacity (9.1 mmol cm−3 at 298 K and 1 bar), and CO2/N2 selectivity (262 at 298 K) by the reversible formation/decomposition of bicarbonate in the adsorption/desorption processes. More importantly, these materials can capture up to 4.1 mmol cm−3 or 13.4 wt% of CO2 from simulated flue gases (CO2 pressure 0.10–0.15 bar at 313 K) even at high relative humidity (82%) and quickly release it under mild regeneration conditions (N2 purge at 358 K), representing the best CO2 capture performances reported to date.

Graphical abstract: Monodentate hydroxide as a super strong yet reversible active site for CO2 capture from high-humidity flue gas

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Supplementary files

Article information


Submitted
26 Aug 2014
Accepted
05 Jan 2015
First published
05 Jan 2015

Energy Environ. Sci., 2015,8, 1011-1016
Article type
Paper
Author version available

Monodentate hydroxide as a super strong yet reversible active site for CO2 capture from high-humidity flue gas

P. Liao, H. Chen, D. Zhou, S. Liu, C. He, Z. Rui, H. Ji, J. Zhang and X. Chen, Energy Environ. Sci., 2015, 8, 1011
DOI: 10.1039/C4EE02717E

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