Publicación: SiO2 supported niobium oxides with active acid sites for the catalytic acetalization of glycerol
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Fecha
2020-10-01
Autores
Kao, Li Chen
Kan, Wen Chen
Guerrero Pérez, María Olga
Bañares, Miguel Ángel
Ya Hsuan Liou, Sofía
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Derechos de acceso
Atribución-NoComercial-SinDerivadas 4.0 Internacional
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info:eu-repo/semantics/closedAccess
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Editor
Elsevier
Resumen
The silica supported niobium oxide catalysts with abundant acid active sites were successfully fabricated and demonstrated catalytic activity in the acetalization of glycerol with acetone to produce solketal. Although Niobium pentachloride which was used as the niobium precursor preferred to aggregate on the surface, the chemical vapor deposition method was introduced to remove the surface chloride. The synthesis parameter of the material affects the structure and the type of the supported niobium oxide on the carrier, and directly changes the amounts of catalytic sites. The effect of calcination temperature/time and loading amount of hydrated niobium oxide on the catalytic performance was investigated. The properties of acid sites on catalysts were characterized, and the catalytic process was directly observed by operando Raman. These in-situ experimental trials could provide deep insight to understand the catalytic mechanism.
Descripción
Categorías UNESCO
Palabras clave
Acetalization, Niobium oxid, Solketal, Operando, Acidity
Citación
Centro
Facultad de Ciencias
Departamento
Química Inorgánica y Química Técnica