Characterization of acid sites in dehydrated H-Beta zeolite by solid state NMR

V. Montouillout (1) , S. Aiello (1) , F. Fayon (2) , Christian Fernandez Fernandez (1)

1 LCS - Laboratoire catalyse et spectrochimie
2 CRMHT - Centre de recherches sur les matériaux à haute température

A large panel of solid-state NMR techniques is used to characterize acid sites in steamed H-Beta. The structural environment of aluminum in hydrated H-Beta zeolite can be classically probed by 27Al MAS NMR. In the case of dehydrated samples, structural information extracted from 1H MAS and double resonance NMR experiments is used to propose a deconvolution of the 27Al Hahn-Echo and QPASS spectra. This provides an estimation of the number and the geometry of aluminum sites.

Domaines: Chimie

V. Montouillout, S. Aiello, F. Fayon, Christian Fernandez Fernandez. Characterization of acid sites in dehydrated H-Beta zeolite by solid state NMR. Studies in Surface Science and Catalysis, 2002, 142 A, pp.383-390. ⟨10.1016/s0167-2991(02)80052-0⟩. ⟨hal-01711639⟩