English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/162202
COMPARTIR / IMPACTO:
Estadísticas
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:
Título

ITQ-39 zeolite, an efficient catalyst for the conversion of low value naphtha fractions into diesel fuel: The role of pore size on molecular diffusion and reactivity

AutorMartínez-Armero, Marta E.; Moliner Marín, Manuel; Sastre, Germán; Rey García, Fernando; Martínez Sánchez, Cristina; Corma, Avelino
Palabras claveCatalyst deactivation
ITQ-39
Diesel production
Naphtha alkylation
Zeolite
Fecha de publicación2016
EditorElsevier
CitaciónJournal of Catalysis 333: 127-138 (2016)
ResumenITQ-39, a multipore zeolite with interconnected 12- and 10-ring channel systems, effectively catalyzes the alkylation of two low value naphtha fractions for the production of diesel range alkylaromatics. A catalytic and molecular dynamics study allows us to conclude that its higher selectivity to the desired diesel fraction and, especially, its longer catalyst life as compared to beta or MCM-22, conventionally used as heterogeneous alkylation catalysts, are due to the combined contribution of its small nano-sized crystallites, moderate Brønsted acidity and unique framework topology. The small diffusion coefficients obtained for alkylaromatics on ITQ-39 as compared to those corresponding to the large pore beta zeolite evidence the significant diffusional problems of most of the reactants and products through the channels of the ITQ-39 structure. Thus, alkylation reactions on this zeolite seem to occur mainly on the most external acid sites (external surface, pore mouths), whereas the zeolite structure contributes positively by preventing undesired reactions to occur, which would result in lower selectivity to the monoalkylated products and in a faster catalyst deactivation.
Versión del editorhttps://doi.org/10.1016/j.jcat.2015.10.024
URIhttp://hdl.handle.net/10261/162202
Identificadoresdoi: 10.1016/j.jcat.2015.10.024
issn: 0021-9517
e-issn: 1090-2694
Aparece en las colecciones: (ITQ) Artículos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
ITQ39.pdf1,7 MBAdobe PDFVista previa
Visualizar/Abrir
Mostrar el registro completo
 

Artículos relacionados:


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