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Issue 44, 2018
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Humidity-induced CO2 capture enhancement in Mg-CUK-1

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Abstract

Kinetic CO2 adsorption measurements in the water-stable and permanently microporous Metal–organic framework material, Mg-CUK-1, reveal a 1.8-fold increase in CO2 capture from 4.6 wt% to 8.5 wt% in the presence of 18% relative humidity. Thermodynamic CO2 uptake experiments corroborate this enhancement effect, while grand canonical Monte Carlo simulations also support the phenomenon of a humidity-induced increase in the CO2 sorption capacity in Mg-CUK-1. Molecular simulations were implemented to gain insight into the microscopic adsorption mechanism responsible for the observed CO2 sorption enhancement. These simulations indicate that the cause of increasing CO2 adsorption enthalpy in the presence of H2O is due to favorable intermolecular interactions between the co-adsorbates confined within the micropores of Mg-CUK-1.

Graphical abstract: Humidity-induced CO2 capture enhancement in Mg-CUK-1

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Publication details

The article was received on 17 Aug 2018, accepted on 19 Oct 2018 and first published on 19 Oct 2018


Article type: Paper
DOI: 10.1039/C8DT03365J
Citation: Dalton Trans., 2018,47, 15827-15834
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    Humidity-induced CO2 capture enhancement in Mg-CUK-1

    M. Sagastuy-Breña, P. G. M. Mileo, E. Sánchez-González, J. E. Reynolds, T. Jurado-Vázquez, J. Balmaseda, E. González-Zamora, S. Devautour-Vinot, S. M. Humphrey, G. Maurin and I. A. Ibarra, Dalton Trans., 2018, 47, 15827
    DOI: 10.1039/C8DT03365J

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