Screening the Effect of Water Vapour on Gas Adsorption Performance: Application to CO2 Capture from Flue Gas in Metal–Organic Frameworks. Issue 7 (2nd March 2017)

• Record Type: Journal Article
• Authors: Chanut, Nicolas; Bourrelly, Sandrine; Kuchta, Bogdan; Serre, Christian; Chang, Jong‐San; Wright, Paul A.; Llewellyn, Philip L.
• Is Part Of: ChemSusChem. Volume 10:Issue 7(2017)
• Page Start: 1543
• Page End: 1553
• Publication Date: 2017-03-02
• Subjects: adsorption -- carbon dioxide -- flue gas -- humidity effect -- metal–organic framework; Green chemistry -- Periodicals; Sustainable engineering -- Periodicals; Chemistry -- Periodicals; Chemical engineering -- Periodicals; 660
• DOI: 10.1002/cssc.201601816
• Languages: English
• ISSNs: 1864-5631

Abstract

Abstract: A simple laboratory‐scale protocol that enables the evaluation of the effect of adsorbed water on CO2 uptake is proposed. 45 metal–organic frameworks (MOFs) were compared against reference zeolites and active carbons. It is possible to classify materials with different trends in CO2 uptake with varying amounts of pre‐adsorbed water, including cases in which an increase in CO2 uptake is observed for samples with a given amount of pre‐adsorbed water. Comparing loss in CO2 uptake between "wet" and "dry" samples with the Henry constant calculated from the water adsorption isotherm results in a semi‐logarithmic trend for the majority of samples allowing predictions to be made. Outliers from this trend may be of particular interest and an explanation for the behaviour for each of the outliers is proposed. This thus leads to propositions for designing or choosing MOFs for CO2 capture in applications where humidity is present. Abstract : Capturing MOFs : A simple screening strategy is proposed to follow the CO2 adsorption behaviour of 45 metal– organic frameworks (MOFs) that are pre‐equilibrated with varying amounts of H2 O. Different behaviours are observed and discussed, ranging from large decreases in CO2 uptake with degree of wetting to a negligible influence of water. Materials showing promising CO2 uptake are highlighted as of interest for further studies.