The role of mesoporosity and Si/Al ratio in the catalytic etherification of glycerol with benzyl alcohol using ZSM-5 zeolites
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Título: | The role of mesoporosity and Si/Al ratio in the catalytic etherification of glycerol with benzyl alcohol using ZSM-5 zeolites |
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Autor/es: | Gonzalez-Arellano, Camino | Grau-Atienza, Aida | Serrano, Elena | Romero, Antonio A. | Garcia-Martinez, Javier | Luque, Rafael |
Grupo/s de investigación o GITE: | Laboratorio de Nanotecnología Molecular (NANOMOL) |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Química Inorgánica |
Palabras clave: | Glycerol | Etherification | Benzyl alcohol | Hierarchical zeolites |
Área/s de conocimiento: | Química Inorgánica |
Fecha de publicación: | sep-2015 |
Editor: | Elsevier |
Cita bibliográfica: | Journal of Molecular Catalysis A: Chemical. 2015, 406: 40-45. doi:10.1016/j.molcata.2015.05.011 |
Resumen: | A comparative study of the influence of three different acid solids as catalysts (conventional zeolites Z15c with Si/Al = 19.5 and Z40c with Si/Al = 48.2, and a hierarchical zeolite Z40c-H with Si/Al = 50.0) for the etherification of glycerol with benzyl alcohol was performed. The catalytic activity and selectivity of these zeolites was elucidated at different catalyst contents. Three different ethers (3-benzyloxy-1,2-propanediol, which is a mono-benzyl-glycerol ether (MBG) and 1,3-dibenzyloxy-2-propanol, which is a di-benzyl-glycerol ether (DBG) and dibenzyl ether (DBz) were identified as the main products. MBG was the major product of the reaction catalyzed by the microporous Z15c zeolite with low Si/Al molar ratio, whereas DBG was formed in higher yield with the use of microporous Z40c and hierarchical Z40c-H zeolites, both of them having a similar high Si/Al molar ratio (≈50). MBG is a value-added product and it is obtained with good yield and selectivity when using the conventional zeolite Z15c as a catalyst. Under the best conditions tested, i.e., 25 mg of catalyst for 8 h at 120 °C, a 62% of conversion was obtained without the need of solvent, with an excellent 84% selectivity toward the MBG and no formation of DBz. |
Patrocinador/es: | Rafael Luque and Camino González-Arellano gratefully acknowledge support from the Spanish MICINN via the concession of a Ramon y Cajal contract (refs. RYC 2009‑04199 and RYC 2010-06268, respectively). Rafael Luque gratefully acknowledges funding from MICINN under project CTQ2011-28954-C02-02. J.G.M. gratefully acknowledges funding under project PCIN-2013-164 (MINECO and UE). Both R.L. and J.G.M. acknowledge support from MICINN under cooperation project CTQ2011-28954. |
URI: | http://hdl.handle.net/10045/53834 |
ISSN: | 1381-1169 (Print) | 1873-314X (Online) |
DOI: | 10.1016/j.molcata.2015.05.011 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © 2015 Elsevier B.V. |
Revisión científica: | si |
Versión del editor: | http://dx.doi.org/10.1016/j.molcata.2015.05.011 |
Aparece en las colecciones: | INV - NANOMOL - Artículos de Revistas |
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2015_Gonzalez_etal_JMolCatA_final.pdf | Versión final (acceso restringido) | 866,92 kB | Adobe PDF | Abrir Solicitar una copia |
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