SABER UCV >
1) Investigación >
Artículos Publicados >

Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/123456789/11542

Título : Phenol alkylation with methanol: effect of sodium content and ammonia selective poisoning of an HY zeolite
Autor : García, Luis
Giannetto, G.
Goldwasser, Mireya
Guisnet, M.
Magnoux, P.
Palabras clave : phenol alkylation
HY zeolites; ammonia poisoning
effects of sodium content
anisole-cresols formation
Fecha de publicación : 21-Jul-2015
Resumen : Sodium exchange and ammonia selective poisoning of the acid sites of an HY zeolite (Si/A1 = 20) were carried out and their effects on the catalytic properties for the alkylation of phenol with methanol (200~ 1 atm and N2/reactants molar ratio of 4) were evaluated. Results show that the reaction is highly sensitive to the number and strength of the acid sites of the catalyst. A decrease in the number of acid sites by sodium exchange of the protons or by ammonia selective poisoning produces important changes in the selectivity of the reaction. In fact, a high increase in the anisole/cresol ratio is observed as the percentage of exchanged sodium in the zeolite increases, while the ammonia selective poisoning shows that at low desorption temperatures (~< 250~ only anisole is formed while at higher desorption temperatures both anisole and cresols were observed. These results show that anisole formation requires sites with lower acid strength compared to those necessary for cresol formation.
URI : http://saber.ucv.ve/jspui/handle/123456789/11542
ISSN : 1011-372X
Aparece en las colecciones: Artículos Publicados

Ficheros en este ítem:

Fichero Descripción Tamaño Formato
Phenol Alquilation.pdf264.23 kBAdobe PDFVisualizar/Abrir

Los ítems de DSpace están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.

 

Valid XHTML 1.0! DSpace Software Copyright © 2002-2008 MIT and Hewlett-Packard - Comentarios