Issue 12, 1985

High-resolution solid-state nuclear magnetic resonance studies of dealuminated zeolite Y

Abstract

The products of hydrothermal treatment of zeolite NH4-Na-Y and of treatment of zeolite Na-Y with silicon tetrachloride vapour under different conditions were examined by 29Si and 27Al high-resolution solid-state n.m.r. with magic-angle spinning (m.a.s.n.m.r.) at high magnetic fields. 29Si m.a.s.n.m.r. in combination with chemical analysis allowed the amount of framework and non-framework aluminium to be readily and quantitatively determined. However, not all non-framework aluminium is observed by 27Al m.a.s.n.m.r. in most samples. Hydrothermal dealumination yielded materials with Si/Al ratios of up to 6.92, while the zeolite dealuminated with Si/Cl4 had framework Si/Al ratios of up to 25 and contained little interstitial aluminium. M.a.s.n.m.r. is superior to X-ray diffraction as a method of determining zeolite composition.

Article information

Article type
Paper

J. Chem. Soc., Faraday Trans. 1, 1985,81, 3003-3019

High-resolution solid-state nuclear magnetic resonance studies of dealuminated zeolite Y

J. Klinowski, C. A. Fyfe and G. C. Gobbi, J. Chem. Soc., Faraday Trans. 1, 1985, 81, 3003 DOI: 10.1039/F19858103003

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