Kinetics of Mesopore Formation in Zeolites

  • ChemPubSoc Europe Logo
  • Author: Sandra Schütte
  • Published Date: 10 May 2018
  • Source / Publisher: Angewandte Chemie International Edition/Wiley-VCH
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA
thumbnail image: Kinetics of Mesopore Formation in Zeolites

Zeolites are the most-used catalysts in oil refining and petrochemistry operations. Their selectivity has been improved and the throughput and quality of the product have been increased by introducing tailored mesoporosity into the zeolites. Mesopore formation in zeolites can be achieved by either surfactant-templating or by dissolution and reassembly. Despite the commercial use of surfactant-templating, the driving forces responsible for the pore formation in this process are still unknown.

Javier Garcia-Martinez and colleagues, University de Alicante, Spain, have studied the kinetics of the development of intracrystalline mesoporosity in zeolites for the first time. They used a combination of in situ techniques such as synchrotron X-ray diffraction (XRD) with ex-situ gas adsorption and thermogravimetric analysis/differential thermal analysis (TG/DTA). The team determined the apparent activation energies of the different processes involved in the mesostructuring of USY zeolites, an ultra-stable form of zeolite Y.

The results provide insights into the mechanism of the surfactant-templating method (pictured), which opens up new possibilities for the introduction of mesoporosity in zeolites using surfactants. The energy required for the hierarchization of USY zeolite by surfactant-templating is very similar to that involved in its crystallization. This suggests that the reorganization of the zeolite can be easily achieved. The kinetics of the whole process are highly dependent on the temperature. The results confirm that mesostructuring of USY zeolite with surfactants is energetically feasible under the conditions used in the synthesis of zeolites.


Article Views: 1254

Sign in Area

Please sign in below

Additional Sign In options

Please note that to comment on an article you must be registered and logged in.
Registration is for free, you may already be registered to receive, e.g., the newsletter. When you register on this website, please ensure you view our terms and conditions. All comments are subject to moderation.

Article Comments - To add a comment please sign in

Bookmark and Share

If you would like to reuse any content, in print or online, from, please contact us first for permission. more

CONNECT: on Facebook on Twitter on YouTube on LinkedIn Sign up for our free newsletter

A product of ChemPubSoc Europe (16 European Chemical Societies)and Wiley-VCH