Abstract
The high silica gel is well organized around the tetraalkylammonium (TAA) cations during prenucleation stage. By combined 13C- and 129Xe- NMR, two TAA+ states, either hydrated or dehydrated, and three different TAA-gel associations can clearly be distinguished:
-
1.
dispersed monomelic or dimeric (either hydrated or dehydrated) TAA+ species (1–2 cations per cavity, cavity diameter ~11–16 Å)
-
2.
less dispersed TAA+ ions (4–8 ions per cavity, cavity diameter ~17–23 Å)
-
3.
large aggregates (TAAX)n (X=OH, Br) (n gt; 15 per cavity, cavity diameter ~30–40 Å)
The addition of alkali cations can influence both the dispersion of TAA+ species and silica gels, hence the crystallization of zeolites. A model is proposed to explain the role of different species in gels for the crystallization of high silica zeolites.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
See, e. g. B. M. Lok, T. R. Cannan and C. A. Messina, Zeolites. 3: 282 (1983).
N. Dewaele, L. Maistriau, J. B. Nagy, Z. Gabelica and E. G. Derouane, Appl. Catal., 37: 273 (1988).
J. P. Van den Berg, P. C. de Jong-Versloot, J. Keijsper and M. F. M. Post, Stud. Surf. Sci. Catal., 37: 85 (1986).
J. B. Nagy, P. Bodart, E. G. Derouane, Z. Gabelica and A. Nastro, Stud. Surf. Sci. Catal., 28: 231 (1986).
L. S. Dent Glasser and G. Harvey, J. Chem. Soc., Chem. Commun., 1250 (1984).
E. G. Derouane, J. B. Nagy, Z. Gabelica and N. Blom, Zeolites. 2: 299 (1982).
Z. Gabelica, J. B. Nagy, P. Bodart, N. Dewaele and A. Nastro, Zeolites. 7: 67 (1987).
T. Ito, J. Fraissard, J. B. Nagy, N. Dewaele, Z. Gabelica, A. Nastro and E. G. Derouane, in Proc. 8th Intern. Zeolite Conference. Amsterdam. 1989. in press.
F. Crea, J. B. Nagy, A. Nastro, G. Giordano and R. Aiello, Thermochim. Acta., 135: 353 (1988).
J. Demarquay and J. Fraissard, Chem. Phvs. Lett., 136: 314 (1987).
E. G. Derouane and J. B. Nagy, Chem. Phvs. Lett., 137: 341 (1987).
J. B. Nagy, Z. Gabelica and E. G. Derouane, Zeolites. 3: 43 (1983).
P. A. Jacobs, E. G. Derouane and J. Weitkamp, J. Chem. Soc., Chem. Commun. 591 (1981).
Z. Gabelica, J. B. Nagy and G. Debras, J. Catal., 84: 256 (1983).
E. G. Derouane, S. Detremmerie, Z. Gabelica and N. Blom, Appl. Catal., 1: 201 (1981)
T. Ito, M. A. Springuel-Huet and J. Fraissard, Zeolites. 9: 68 (1989)
J. L. Schlenker, W. J. Rohrbaugh, P. Chu, E. W. Valyocsik and G. T. Kokotailo, Zeolites. 5: 355 (1985).
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1990 Plenum Press, New York
About this chapter
Cite this chapter
Chen, Q. et al. (1990). A 13C - and 129Xe-NMR Study of the Role of Tetraalkylammonium Cations in the Synthesis of High-Silica Zeolites. In: Barthomeuf, D., Derouane, E.G., Hölderich, W. (eds) Guidelines for Mastering the Properties of Molecular Sieves. NATO ASI Series, vol 221. Springer, Boston, MA. https://doi.org/10.1007/978-1-4684-5787-2_4
Download citation
DOI: https://doi.org/10.1007/978-1-4684-5787-2_4
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4684-5789-6
Online ISBN: 978-1-4684-5787-2
eBook Packages: Springer Book Archive