1. Characterization of acid sites in dehydrated H-beta zeolite by solid state NMR
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Valerie Montouillout, Aiello, S., Fayon, F., Laboratoire catalyse et spectrochimie (LCS), Centre National de la Recherche Scientifique (CNRS)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Normandie Université (NU)-Institut de Chimie du CNRS (INC)-Université de Caen Normandie (UNICAEN), Normandie Université (NU), Centre de recherches sur les matériaux à haute température (CRMHT), and Centre National de la Recherche Scientifique (CNRS)
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fungi ,[CHIM]Chemical Sciences ,complex mixtures - Abstract
International audience; 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.
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