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Article Dans Une Revue Microporous and Mesoporous Materials Année : 2021

Preparation of hierarchical SSZ-13 by NH4F etching

Résumé

NH4-SSZ-13 was etched with an aqueous solution of 40 w/% NH4F under different time/temperature conditions to obtain hierarchical derivatives. The etched zeolites were characterized by XRD, SEM, N2 physisorption, 29 Si /27 Al /19 F MAS NMR, ICP-AES, and their acidity monitored by in situ FTIR spectroscopy using acetonitrile as a probe molecule. The results highlight that the zeolite is very sensitive to high temperature and high liquid-solid ratio treatments leading to substantial crystallinity losses. These two parameters need careful tuning to obtain hierarchical derivatives retaining important characteristics as micropore volume and framework Si/Al ratio. The catalytic activity of the modified SSZ-13 is evaluated in the n-propanol conversion.

Domaines

Chimie
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Dates et versions

hal-03418388 , version 1 (07-11-2021)

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Viktoria Babić, Siddardha Koneti, Simona Moldovan, Nikolai Nesterenko, Jean-Pierre Gilson, et al.. Preparation of hierarchical SSZ-13 by NH4F etching. Microporous and Mesoporous Materials, 2021, 314, pp.110863. ⟨10.1016/j.micromeso.2020.110863⟩. ⟨hal-03418388⟩
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