{"controller"=>"catalog", "action"=>"show", "id"=>"247921603"}
  • EN
  • DA

Danish NationalResearch Database

  • Search Publications & Researchers
  • Open Access Indicator
  • Publications
  • Researchers
Example Finds records
water{} containing the word "water".
water supplies"{}" containing the phrase "water supplies".
author:"Doe, John"author:"{}" containing the prase "Doe, John" in the author field.
title:IEEEtitle:{} containing the word "IEEE" in the title field.
Need more help? Advanced search tutorial
  • Selected (0)
  • History

On the location, strength and accessibility of Brønsted acid sites in hierarchical ZSM-5 particles

    • Save to Mendeley
    • Export to BibTeX
    • Export to RIS
    • Email citation
Authors:
  • Tzoulaki, Despina ;
    Close
    Technische Universität München
  • Jentys, Andreas ;
    Close
    Technische Universität München
  • Pérez-Ramírez, Javier ;
    Close
    Swiss Federal Institute of Technology
  • Egeblad, Kresten ;
    Close
    Department of Chemistry, Technical University of Denmark
  • Lercher, Johannes A.
    Close
    Technische Universität München
DOI:
10.1016/j.cattod.2012.03.078
Abstract:
Microporous and mesoporous (hierarchical) ZSM-5 samples, prepared by desilication, dealumination and templating with carbon nanoparticles have been characterized by adsorbing benzene, cyclohexane and 1,3,5-trimethylbenzene (mesitylene) to probe the location, the strength and the accessibility of Brønsted acid sites. The mesoporosity introduced by the methods explored resulted in a statistical accommodation of benzene at the channel intersections. Cyclohexane showed the highest strength of physisorption in micro- and mesopores and, thus, probes the largest fractions of acid sites. Mesitylene adsorption showed that mesopores of hierarchical zeolites do not contain Brønsted acid sites. All results indicated that the mesoporosity influences only the accessibility of the acid sites in the ZSM-5 crystals mostly via shortening diffusion pathways, but not the strength of the interaction with the cyclic hydrocarbons. The enhanced transport rates observed for benzene are associated to the decreased pore length inside the mesoporous particles, rather than to changes of the pore structure or the generation of additional sites.
Type:
Journal article
Language:
English
Published in:
Catalysis Today, 2012, Vol 198, Issue 1, p. 3-11
Keywords:
HZSM-5; Mesoporosity; Adsorption; Infrared spectroscopy; Brønsted acid sites
Main Research Area:
Science/technology
Publication Status:
Published
Review type:
Peer Review
Submission year:
2012
Scientific Level:
Scientific
ID:
247921603

Full text access

  • Doi Get publisher edition via DOI resolver
Checking for on-site access...

On-site access

At institution

  • Technical university of dk

Metrics

Feedback

Sitemap

  • Search
    • Statistics
    • Tutorial
    • Data
    • FAQ
    • Contact
  • Open Access
    • Overview
    • Development
    • FAQ
    • Contact
  • About
    • Institutions
    • Release History
    • Cookies and privacy policy

Copyright © 1998–2018.

Fivu en