Ir a la página de inicio del Gobierno del Principado de Asturias

Datos del Documento

Utilice este identificador para citar o enlazar este documento: https://ria.asturias.es/RIA/handle/123456789/10869


Título: Effect of Au nanoparticles on the activity of TiO2 for ethanol upgrading reactions
Autores: Jorge Quesada, Ricardo Arreola-Sánchez
Laura Faba, Eva Díaz
Víctor M. Rentería-Tapia, Salvador Ordóñez
Palabras Claves: Catálisis
Tecnología Química
Fecha Edición: 5-Feb-2018
Resumen: This article analyses the role of gold nanoparticles supported on TiO2 for the gas-phase ethanol condensation. Previously, the original P25 surface was modified for increasing the Au-Ti interaction, in order to minimize the thermal deactivation. Catalysts were tested both in absence and presence of hydrogen (523–673 K, WHSV =7.9 h−1; yEtOH =0.32; yH2 =0-0.1; 0.1 MPa). Parent TiO2 is mainly selective for dehydration reactions yielding diethyl ether (favoured at low temperatures) and ethylene (favoured at higher temperatures). The presence of Au in the catalyst promotes dehydrogenation pathways, yielding acetaldehyde, as well as condensation products (mainly butanol, with selectivities close to 10%). According to DRIFT spectroscopy results, the strong ethanol adsorption on the TiO2 surface justifies the low yields and the high relevance of side-reactions produced by inter- or intra- molecular dehydration routes (diethyl ether, and ethylene formation). The gold addition minimizes this adsorption and enhances the main route by a double role: an improvement in the dehydrogenation rate (yielding more acetaldehyde) and an enhancement in the hydrogenation steps.
URI: https://ria.asturias.es/RIA/handle/123456789/10869
Aparece en las Colecciones:Química

Archivos en este documento:



Archivo TamañoFormato
Appl. Catal. A-Gen. 551 (2018) 23-33 RIA.pdf1,3 MBAdobe PDFVer/Abrir



Todos los documentos en RIA están protegidos por derechos de autor.


Valid XHTML 1.0! DSpace Software Copyright © 2002-2007 MIT and Hewlett-Packard - Contacto