Influence of the TAABr salts on the crystallization of ETS-10

ETS-10 zeolite was synthesized under hydrothermal conditions from gels containing TiCl 4 and sodium silicate as titanium and silica source in the presence of tetraalkylammonium bromides, TAABr (TAA +: TMA +, TEA +, TPA + and TBA +). The samples were characterized by XRD, thermal analysis (TG, DSC),...

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Bibliographic Details
Published in:Microporous and mesoporous materials 2004-06, Vol.71 (1), p.77-85
Main Authors: Pavel, C.C, B.Nagy, J, Bilba, N, Nastro, A, Perri, C, Vuono, D, De Luca, P, Asaftei, I.V
Format: Article
Language:English
Subjects:
Chemistry
ETS-10
Exact sciences and technology
General and physical chemistry
Hydrated TAA ions
Ion-exchange
Kinetics
Multinuclear NMR
Surface physical chemistry
Zeolites: preparations and properties
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Summary:ETS-10 zeolite was synthesized under hydrothermal conditions from gels containing TiCl 4 and sodium silicate as titanium and silica source in the presence of tetraalkylammonium bromides, TAABr (TAA +: TMA +, TEA +, TPA + and TBA +). The samples were characterized by XRD, thermal analysis (TG, DSC), SEM and multinuclear 13C- and 29Si-NMR. The reaction kinetics was determined at 170, 190 and 210 °C. The following sequence was found for the activation energy: ETS-10 > TMA-ETS-10 ∼ TEA-ETS-10 > TPA-ETS-10 > TBA-ETS-10. The chemical shifts of the organic cations based on 13C-NMR spectra showed clearly that the TAA + ions are incorporated in the ETS-10 channels.
ISSN:1387-1811
1873-3093
DOI:10.1016/j.micromeso.2004.03.017