Catalysis Letters

, Volume 3, Issue 3, pp 263–272 | Cite as

1H mas NMR and IR studies of the acidic properties of realuminated zeolite Y

  • Jacek Klinowski
  • Halimaton Hamdan
  • Avelino Corma
  • Vincente Fornès
  • Michael Hunger
  • Dieter Freude
Article
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Revised:

Abstract

IR and1H MAS NMR confirm that extra-framework aluminium present in dealuminated (ultrastable) zeolite Y is reintroduced into the framework by treatment with strongly basic solutions at elevated temperatures. The realuminated sample contains twice as many Brønsted acid sites than the ultrastable precursor and, with an accuracy of 20%, the same number of acid sites as the parent as-prepared zeolite. However, not as many hydroxyl groups associated with framework Al in the product are acccesible to pyridine as in the parent sample.

Keywords

Aluminium Physical Chemistry Hydroxyl Zeolite Catalysis 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Copyright information

© J.C. Baltzer A.G. Scientific Publishing Company 1989

Authors and Affiliations

  • Jacek Klinowski
    • 1
  • Halimaton Hamdan
    • 1
  • Avelino Corma
    • 2
  • Vincente Fornès
    • 2
  • Michael Hunger
    • 3
  • Dieter Freude
    • 3
  1. 1.Department of ChemistryUniversity of CambridgeCambridgeUK
  2. 2.Instituto de Cátalisis y PetroleoquímicaConsejo Superior de Investigaciones CientificasMadridSpain
  3. 3.Sektion Physik der Karl-Marx-Universität LeipzigLeipzigGerman Democratic Republic

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