Article (Scientific journals)
Optimizing support properties of heterogeneous catalysts for the coupling of carbon dioxide with epoxides
Léonard, Géraldine L.-M.; Pirard, Sophie; Belet, Artium et al.
2019In Chemical Engineering Journal, 371, p. 719-729
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Keywords :
cyclic carbonate; carbon dioxide
Abstract :
[en] The study deals with the catalytic cyclocarbonation of epoxides to produce monomers used in the synthesis of polyurethane. A benchmark study of the textural properties of silica-based, doped or not, supports enabling the identification and optimization of the key parameters affecting the catalytic activity is reported. The results reveal that ammonium catalysts immobilized onto mesostructured supports with high surface area and low aggregation show better catalytic performances than analogue catalysts grafted onto microstuctured ones. While a high external surface area favours the grafting of ammonium salt, pore size must be large enough to enhance the accessibility of both carbon dioxide and epoxides to the catalytic sites. The activity of heterogeneous cat- alysts was evaluated for a model coupling reaction between carbon dioxide and propylene glycol diglycidylether. Using appropriated supports, cyclocarbonation yields are found to be higher in the presence of the hetero- geneous catalyst in comparison with the homogeneous one. These results allow to confirm the beneficial effect of the presence of residual OH silanol groups at the surface of the support, which activate epoxide through forming of hydrogen bonds.
Research center :
Complex and Entangled Systems from Atoms to Materials (CESAM) Research Unit
Center for Education and Research on Macromolecules (CERM)
Nanomaterials, Catalysis, Electrochemistry
Disciplines :
Materials science & engineering
Chemistry
Author, co-author :
Léonard, Géraldine L.-M.;  University of Liège (ULiège), Department of Chemical Engineering – Nanomaterials, Catalysis, Electrochemistry
Pirard, Sophie ;  University of Liège (ULiège), Department of Chemical Engineering – Nanomaterials, Catalysis, Electrochemistry
Belet, Artium ;  University of Liège (ULiège), Department of Chemical Engineering – Nanomaterials, Catalysis, Electrochemistry
Grignard, Bruno ;  University of Liège (ULiège), Complex and Entangled Systems from Atoms to Materials (CESAM) Research Unit, Center for Education and Research on Macromolecules (CERM), Belgium
Detrembleur, Christophe ;  University of Liège (ULiège), Complex and Entangled Systems from Atoms to Materials (CESAM) Research Unit, Center for Education and Research on Macromolecules (CERM), Belgium
Jérôme, Christine  ;  University of Liège (ULiège), Complex and Entangled Systems from Atoms to Materials (CESAM) Research Unit, Center for Education and Research on Macromolecules (CERM), Belgium
Heinrichs, Benoît ;  University of Liège (ULiège), Department of Chemical Engineering – Nanomaterials, Catalysis, Electrochemistry
Language :
English
Title :
Optimizing support properties of heterogeneous catalysts for the coupling of carbon dioxide with epoxides
Publication date :
01 September 2019
Journal title :
Chemical Engineering Journal
ISSN :
1385-8947
eISSN :
1873-3212
Publisher :
Elsevier B.V.
Volume :
371
Pages :
719-729
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 12 July 2019

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