Autor según el artículo: Perez-Barrado, Elena; Cinta Pujol, Maria; Aguilo, Magdalena; Llorca, Jordi; Cesteros, Yolanda; Diaz, Francesc; Pallares, Josep; Marsal, Lluis F.; Salagre, Pilar;
Departamento: Enginyeria Electrònica, Elèctrica i Automàtica Química Física i Inorgànica
Autor/es de la URV: Aguiló Díaz, Magdalena / Cesteros Fernández, Yolanda / Díaz González, Francisco Manuel / Marsal Garví, Luis Francisco / Pallarès Marzal, Josep / Pujol Baiges, Maria Cinta / Salagre Carnero, María Pilar
Palabras clave: Short-chain polyglycerol Selective etherification Renewable resources Porosity Mgal layered double hydroxides Mesoporous catalysts Hydrotalcites Hydrocalumite Glycerol etherification Diglycerol Diffraction Derivatives Caal layered double hydroxides Basicity Acid-base properties
Resumen: Several MgAl-LDHs (HT) and CaAl-LDHs (HC) were synthesized in different conditions and later calcined at 723 K, resulting in catalysts (cHT and cHC), with different acid base properties. Calcined samples were tested in the etherification reaction of glycerol towards short-chain oligomers (di- to pentaglycerol). All catalysts were characterised by XRPD, ICP, N-2,physisorption and TEM techniques. The basicity was evaluated using the CO2-TPD technique and the acidity by cyclohexylamine adsorption. Catalytic results were correlated with catalysts properties. Catalysts with higher acidity showed higher conversion (96% for a cHT and 75% for a cHC) but also higher selectivity to other products, with main contribution of acrolein (88% for a cHT and 58% for a cHC). In contrast, catalysts with lower acidity resulted in lower conversion (24% for a cHT and 40% for a cHC) but higher selectivity towards di- and triglycerol (100% and 64%, respectively). The formation of triglycerol and other low-weight polyglycerols (tetra- and pentaglycerol) was favoured in catalysts with low acidity and strong basic sites. When the temperature of calcination was raised to 1073 K for one cHC, the acidity decreased and the number of strong basic sites increased, resulting in higher selectivity to triglycerol (20%), the formation of tetra- and pentaglycerol (15% and 6%, respectively) and the decrease of the acrolein amount. (C) 2014 Elsevier B.V. All rights reserved.
Áreas temáticas: Química Odontología Medicina veterinaria Materiais Interdisciplinar Industrial and manufacturing engineering General chemistry General chemical engineering Farmacia Environmental chemistry Ensino Engineering, environmental Engineering, chemical Engineering (miscellaneous) Engenharias iv Engenharias iii Engenharias ii Engenharias i Economia Ciências biológicas iii Ciências biológicas ii Ciências biológicas i Ciências ambientais Ciências agrárias i Ciência de alimentos Chemistry (miscellaneous) Chemistry (all) Chemical engineering (miscellaneous) Chemical engineering (all) Biotecnología Biodiversidade Astronomia / física Administração pública e de empresas, ciências contábeis e turismo
Acceso a la licencia de uso: https://creativecommons.org/licenses/by/3.0/es/
Direcció de correo del autor: pilar.salagre@urv.cat f.diaz@urv.cat lluis.marsal@urv.cat yolanda.cesteros@urv.cat mariacinta.pujol@urv.cat magdalena.aguilo@urv.cat josep.pallares@urv.cat
Identificador del autor: 0000-0003-3257-2022 0000-0003-4581-4967 0000-0002-5976-1408 0000-0002-5439-9358 0000-0002-1052-8031 0000-0001-6130-9579 0000-0001-7221-5383
Fecha de alta del registro: 2024-04-27
Versión del articulo depositado: info:eu-repo/semantics/acceptedVersion
Enlace a la fuente original: https://www.sciencedirect.com/science/article/abs/pii/S138589471401585X
URL Documento de licencia: http://repositori.urv.cat/ca/proteccio-de-dades/
Referencia al articulo segun fuente origial: Chemical Engineering Journal. 264 547-556
Referencia de l'ítem segons les normes APA: Perez-Barrado, Elena; Cinta Pujol, Maria; Aguilo, Magdalena; Llorca, Jordi; Cesteros, Yolanda; Diaz, Francesc; Pallares, Josep; Marsal, Lluis F.; Sala (2015). Influence of acid-base properties of calcined MgAl and CaAl layered double hydroxides on the catalytic glycerol etherification to short-chain polyglycerols. Chemical Engineering Journal, 264(), 547-556. DOI: 10.1016/j.cej.2014.11.117
DOI del artículo: 10.1016/j.cej.2014.11.117
Entidad: Universitat Rovira i Virgili
Año de publicación de la revista: 2015
Tipo de publicación: Journal Publications
Repositori URV