Autor según el artículo: Salagre, P.; Granados-Reyes, J.; Cesteros, Y.

Departamento: Química Física i Inorgànica

Autor/es de la URV: SALAGRE CARNERO, MARÍA PILAR; Granados-Reyes, J.; CESTEROS FERNÁNDEZ, YOLANDA

Palabras clave: Calcined CaAl-LDH Glycerol Glycerol carbonate

Resumen: The effect of the preparation conditions of several calcined Ca/Al layered double hydroxide compounds (CaAl-LDH) on the catalytic transesterification of glycerol with dimethyl carbonate to obtain glycerol carbonate has been studied. The CaAl-LDH precursors were prepared by aging under microwaves or conventional heating, and using chlorides or nitrates as interlayer anions. Calcination conditions, such as temperature, time and calcination system, were modified. After 3 h of reaction, the catalysts obtained by calcination at 450 ºC for 15 h in air exhibited moderate-high glycerol conversion (46-76%) and moderate selectivity to glycerol carbonate (41-65%). Calcination at 450 ºC at longer calcination time or the use of a dynamic inert-atmosphere system during calcination led to higher conversion (89-94%) and higher selectivity to glycerol carbonate (72-73%). This has been related to the higher basicity of these catalysts. Finally, calcination at 750 ºC resulted in high conversion (88-98%) and high selectivity to glycerol carbonate (60-85%) due to the presence in the catalysts of highly basic CaO. Several catalytic reuses favoured the decarboxylation of glycerol carbonate resulting in the formation of higher amounts of glycidol (42%). The progressive loss of conversion and selectivity to glycerol carbonate observed has been attributed to the loss of some CaO basic centres during reaction.

Grupo de investigación: Materials Catalítics en Química Verda

Áreas temáticas: Química Química Chemistry

Acceso a la licencia de uso: https://creativecommons.org/licenses/by/3.0/es/

ISSN: 0926-860X

Identificador del autor: 0000-0003-3257-2022; ; 0000-0002-5439-9358

Fecha de alta del registro: 2018-03-15

Página final: 17

Volumen de revista: 536

Versión del articulo depositado: info:eu-repo/semantics/submittedVersion

Enlace a la fuente original: https://www.sciencedirect.com/science/article/pii/S0926860X17300686

Programa de financiación: plan; CTQ2011-24610

DOI del artículo: 10.1016/j.apcata.2017.02.013

Entidad: Universitat Rovira i Virgili

Año de publicación de la revista: 2017

Página inicial: 9

Tipo de publicación: Article Artículo Article