Article (Scientific journals)
Small Pore Gallates MOFs for Environmental Applications: Sorption Behaviors and Structural Elucidation of Their High Affinity for CO2
Heymans, Nicolas; Bourrelly, S.; Normand, Périne et al.
2020In Journal of Physical Chemistry. C, Nanomaterials and interfaces, 124 (5), p. 3188-3195
Peer Reviewed verified by ORBi
 

Files


Full Text
proof-1.pdf
Author preprint (1.68 MB)
Request a copy

All documents in ORBi UMONS are protected by a user license.

Send to



Details



Abstract :
[en] The ability of two small pore Metal Organic Frameworks (MOFs) to capture CO2 was investigated by a combination of gas sorption measurements, X-ray powder diffraction (XRPD) analysis, microcalorimetry experiments and Ideal Adsorbed Solution Theory (IAST) calculations. The title solids, formulated Mg(H2gal) and Fe(Hgal) (H4gal = gallic acid) are made of a naturally occurring ligand, and were both prepared on the multigram scale under mild conditions. They both present very similar structures, with identical channels of ca 3.5 Å diameter, but present different amounts of acidic protons on the surface of the pores. These compounds were found to be extremely hydrophilic, and exhibit a moderate stability towards water. Whilst their ability to adsorb CH4 and N2 is very limited, they both adsorb significant amounts of CO2 even at low pressure (3 and 5 mmol g-1 at 1 bar and 303 K for the Fe and Mg derivatives respectively). As a consequence, these compounds present high CO2/N2 and CO2/CH4 selectivities together with good working capacities, making them of interest for the capture of CO2 from flue gas or for landfill gas upgrading in pressure swing adsorption or vacuum swing adsorption processes. Finally, the analysis of the Mg derivative by X-Ray Diffraction (XRD) and adsorption microcalorimetry revealed that its high affinity for CO2 relies on a strong and specific site of adsorption involving double hydrogen bonds between the CO2 molecules and the acidic protons of the framework.
Disciplines :
Environmental sciences & ecology
Chemistry
Author, co-author :
Heymans, Nicolas  ;  Université de Mons > Faculté Polytechnique > Thermodynamique, Physique mathématiques
Bourrelly, S.
Normand, Périne 
Bloch, E.
Mkhadder, H.
Cooper, L.
Gorman, M.
Bouzidi, I.
Guillou, N.
De Weireld, Guy ;  Université de Mons > Faculté Polytechnique > Service de Thermodynamique, Physique mathématiques
Devic, T.
Language :
English
Title :
Small Pore Gallates MOFs for Environmental Applications: Sorption Behaviors and Structural Elucidation of Their High Affinity for CO2
Publication date :
16 January 2020
Journal title :
Journal of Physical Chemistry. C, Nanomaterials and interfaces
ISSN :
1932-7447
Publisher :
American Chemical Society, Washington, United States - District of Columbia
Volume :
124
Issue :
5
Pages :
3188-3195
Peer reviewed :
Peer Reviewed verified by ORBi
Research unit :
F506 - Thermodynamique, Physique mathématiques
Research institute :
R200 - Institut de Recherche en Energie
Available on ORBi UMONS :
since 28 January 2020

Statistics


Number of views
12 (1 by UMONS)
Number of downloads
0 (0 by UMONS)

Scopus citations®
 
11
Scopus citations®
without self-citations
9
OpenCitations
 
4

Bibliography


Similar publications



Contact ORBi UMONS