Catalysis Letters

, Volume 14, Issue 3–4, pp 349–357 | Cite as

MAS NMR studies of ZSM-5 zeolites: Correlation to para selectivity and SEM observations

  • J. V. Prasad
  • K. V. Rao
  • Y. S. Bhat
  • A. B. Halgeri
Article

Abstract

27Al and29Si MAS NMR studies of various ZSM-5 zeolites of different Si/Al ratio, crystal size synthesized with and without alkali metal salt addition by the hydrothermal technique were carried out. The NMR observations clearly showed that the technique can be employed to differentiate Si/Al ratio, framework tetrahedral content and the crystal size. The last observation has been confirmed by SEM and catalytic activity test for para ethylation of ethylbenzene. A good correlation was found between the catalytic activity and the data from NMR and SEM.

Keywords

Solid state29Si and27Al NMR zeolites SEM selectivity 

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Copyright information

© J.C. Baltzer A.G. Scientific Publishing Company 1992

Authors and Affiliations

  • J. V. Prasad
    • 1
  • K. V. Rao
    • 1
  • Y. S. Bhat
    • 1
  • A. B. Halgeri
    • 1
  1. 1.Research CentreIndian Petrochemicals Corporation LimitedBarodaIndia

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