Porous Nanostructured Catalysts Based on Silicates and Their Surface Functionality: Effects of Silica Source and Metal Added in Glycerol Valorization

A series of nanospherical-shaped silicates containing heteroatoms (Al, Zr or Ti) were successfully synthesized using tetraethylorthosilicate (TEOS) or silica colloids as a silicon source. These metallosilicate nanospheres were used as silicon nutrients to obtain silicalite zeolites with micro-mesopo...

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Bibliographic Details
Published in:Catalysts 2024-08, Vol.14 (8), p.526
Main Authors: Carmo, José Vitor C., Nogueira, Joabson, Bertoldo, Gabriela M., Clemente, Francisco E., Oliveira, Alcineia C., Campos, Adriana F., Duarte, Gian C. S., Tehuacanero-Cuapa, Samuel, Jiménez-Jiménez, José, Rodríguez-Castellón, Enrique
Format: Article
Language:English
Subjects:
Acetic acid
Acids
Aluminum
Analysis
Catalysts
Chemical synthesis
Esterification
Glycerin
Glycerol
Investigations
Metallic glasses
Morphology
Nanoparticles
Nanospheres
Nanostructured materials
Nutrients
Porous materials
Scanning electron microscopy
Silica
Silicalite
Silicates
Silicon
Silicon dioxide
Spheres
Surfactants
Titanium
Triacetin
Zeolites
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Summary:A series of nanospherical-shaped silicates containing heteroatoms (Al, Zr or Ti) were successfully synthesized using tetraethylorthosilicate (TEOS) or silica colloids as a silicon source. These metallosilicate nanospheres were used as silicon nutrients to obtain silicalite zeolites with micro-mesoporosity and improved textural properties. The results demonstrated that TEOS acted as a suitable silicon source to produce amorphous silicates and a spherical-type zeolite architecture with Zr and Ti heteroatoms included in their framework, with preferable particle size and crystallinity. The surface functionality of the mesostructured nanospheres and zeolite silicates provide active centers for the esterification of glycerol with acetic acid (EG) reaction. The dispersion of Cu entities on the surface of the zeolites achieved high glycerol conversions selectively producing triacetin in comparison with Fe counterparts.
ISSN:2073-4344
2073-4344
DOI:10.3390/catal14080526