New synthesis routes and catalytic applications of ferrierite crystals. Part 1: 1,8-Diaminooctane as a new OSDA

Enrico Catizzone (1) , Massimo Migliori (2) , Tzonka Mineva (3) , Stijn van Daele (4) , Valentin Valtchev (5) , Girolamo Giordano (2)

1 ENEA - Italian National agency for new technologies, Energy and sustainable economic development [Frascati]
2 Unical - Università della Calabria [Arcavacata di Rende]
3 ICGM - Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier
4 [TRTF] - Total Research and Technology Feluy
5 LCS - Laboratoire catalyse et spectrochimie

Ferrierite zeolite crystals were successfully prepared by a long amine as 1,8diaminoctane (DAO) as organic structure directing agent. By comparison, shorter amine, i.e. ethylenediamine (EN), was also used as OSDA. Results shows that the presence of DAO reduces the crystallization time and allows to obtain single FER-type crystlas with smaller size and higher acidity, being these significant parameters to take into account when zeolites are applied in catalysis. The obtained samples were characterized with XRD, TG/DTA, SEM, N 2 adsoprtion/desorption, FTIR and 27 Al-NMR. In particular, TGA clearly shows that DAO may be accommodate in zeolite framework and theoretical modeling suggests a preferential location in the 10-MR ring channels.

Mots clés: Ferrierite; zeolite synthesis; 1; 8-diaminooctane; Brønsted-Lewis acidity; FT-IR; DFT calculation

Domaines: Chimie

Enrico Catizzone, Massimo Migliori, Tzonka Mineva, Stijn van Daele, Valentin Valtchev, et al.. New synthesis routes and catalytic applications of ferrierite crystals. Part 1: 1,8-Diaminooctane as a new OSDA. Microporous and Mesoporous Materials, 2020, 296, pp.109987. ⟨10.1016/j.micromeso.2019.109987⟩. ⟨hal-03035145⟩