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Monitoring of structural changes accompanying ultrastabilization of faujasitic zeolite catalysts

Nature volume 296, pages 533536 (08 April 1982) | Download Citation

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Abstract

By recording high-resolution solid-state NMR spectra of zeolitic samples spun (at 3 kHz) at the magic angle (θ = 54° 44′ so that 3 cos2 θ−1 = 0) to the magnetic field, the chemical identity of the first and second coordination shells surrounding Si may be determined, and a distinction made between octahedrally and tetrahedrally bonded Al. The technique, therefore, enables the atomic course of dealumination, known to be responsible for the stabilization of catalytic zeolites, to be directly determined.

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Author information

Affiliations

  1. Department of Physical Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EP, UK

    • J. Klinowski
    •  & J. M. Thomas
  2. Guelph-Waterloo Centre for Graduate Work in Chemistry, Department of Chemistry, University of Guelph, Ontario Canada N1G 2W1

    • C. A. Fyfe
    •  & G. C. Gobbi
  3. To whom correspondence should be addresssed.

    • J. M. Thomas
    •  & C. A. Fyfe

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https://doi.org/10.1038/296533a0

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