Repositorio Institucional
Repositorio Institucional
CONICET Digital
  • Inicio
  • EXPLORAR
    • AUTORES
    • DISCIPLINAS
    • COMUNIDADES
  • Estadísticas
  • Novedades
    • Noticias
    • Boletines
  • Ayuda
    • General
    • Datos de investigación
  • Acerca de
    • CONICET Digital
    • Equipo
    • Red Federal
  • Contacto
JavaScript is disabled for your browser. Some features of this site may not work without it.
  • INFORMACIÓN GENERAL
  • RESUMEN
  • ESTADISTICAS
 
Artículo

Hierarchical H-ZSM-5 zeolite and sulfonic SBA-15: The properties of acidic H and behavior in acetylation and alkylation reactions

Tonutti, Lucas GabrielIcon ; Decolatti, Hernán PabloIcon ; Querini, Carlos AlbertoIcon ; Dalla Costa, Bruno OscarIcon
Fecha de publicación: 10/2020
Editorial: Elsevier Science
Revista: Microporous and Mesoporous Materials
ISSN: 1387-1811
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Otras Ingeniería Química

Resumen

A commercial H-ZSM-5 zeolite was modified by alkaline treatment using NaOH solutions in different concentrations, followed by consecutive ion exchanges with NH4NO3 solution in order to recover the acidic form of the material. According to the intensity of the treatment, mesoporosity with pore size ranged between 9 and 13 nm was generated in the zeolite. Also, the strength and number of acid sites were practically maintained, observing only a noticeable decrease for the more intense treatment. After testing in the glycerol acetylation reaction, some improvements in the activity were observed compared to the original zeolite, but no appreciable increment in the selectivity to diacetin (DA) and triacetin (TA) was reached. However, when a mesoporous SBA-15 functionalized with propylsulfonic acid groups was used as catalyst, the selectivities to DA and TA were noticeably enhanced. Moreover, the zeolites were tested in the isobutane/butene alkylation reaction in gas phase, and also in this case the modified materials did not favor the production of trimethylpentanes (TMPs) compared to the original zeolite. Characterization results allowed to conclude that the mesopores formed in the zeolite after the modification facilitated the accessibility of reactants and products to some acid sites, but these have not enough concentration, being most of them located in the micropores of the zeolite. H-D exchange in sulfonic SBA-15 prior to butene pulses demonstrated that its acidic H has not capacity for butenes adsorption. This explains the lack of activity of this catalyst in the isobutane/butene alkylation reaction.
Palabras clave: ACID SITES LOCATION , ALKALINE TREATMENT , GLYCEROL ACETYLATION , H-ZSM-5 ZEOLITE , ISOBUTANE ALKYLATION
Ver el registro completo
 
Archivos asociados
Tamaño: 1.615Mb
Formato: PDF
.
Solicitar
Licencia
info:eu-repo/semantics/restrictedAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/145709
URL: https://linkinghub.elsevier.com/retrieve/pii/S1387181120302870
DOI: http://dx.doi.org/10.1016/j.micromeso.2020.110284
Colecciones
Articulos(INCAPE)
Articulos de INST.DE INVEST.EN CATALISIS Y PETROQUIMICA "ING. JOSE MIGUEL PARERA"
Citación
Tonutti, Lucas Gabriel; Decolatti, Hernán Pablo; Querini, Carlos Alberto; Dalla Costa, Bruno Oscar; Hierarchical H-ZSM-5 zeolite and sulfonic SBA-15: The properties of acidic H and behavior in acetylation and alkylation reactions; Elsevier Science; Microporous and Mesoporous Materials; 305; 10-2020; 1-12
Compartir
Altmétricas
 

Enviar por e-mail
Separar cada destinatario (hasta 5) con punto y coma.
  • Facebook
  • X Conicet Digital
  • Instagram
  • YouTube
  • Sound Cloud
  • LinkedIn

Los contenidos del CONICET están licenciados bajo Creative Commons Reconocimiento 2.5 Argentina License

https://www.conicet.gov.ar/ - CONICET

Inicio

Explorar

  • Autores
  • Disciplinas
  • Comunidades

Estadísticas

Novedades

  • Noticias
  • Boletines

Ayuda

Acerca de

  • CONICET Digital
  • Equipo
  • Red Federal

Contacto

Godoy Cruz 2290 (C1425FQB) CABA – República Argentina – Tel: +5411 4899-5400 repositorio@conicet.gov.ar
TÉRMINOS Y CONDICIONES