Theory of Broensted acidity in zeolites

R.A. Santen, van, G.J. Kramer, W.P.J.H. Jacobs

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Samenvatting

The nature of the chem. bond of protons in a zeolite is analyzed from theor. and spectroscopic results. Of interest is the dependence on zeolite structure as well as compn. The zeolitic OH bond is mainly covalent. Proton attachment to the zeolite lattice causes a weakening of neighboring Si-O and Al-O bonds. The effective increase in vol. of the bridging O atom causes a local deformation, that changes the strength of the lattice-chem. bonds over a few bond distances. Proton concn. effects as well as lattice-compn. effects can be understood from the lattice-relaxation model. The energetics of proton transfer is controlled by the need to stabilize the resulting Zwitter-ion. The pos. charge on the cation becomes stabilized by contact with basic lattice-O atoms
Originele taal-2Engels
TitelElementary reaction steps in heterogeneous catalysis : proceedings of the NATO advanced research workshop, Bedoin, Vaucluse, France, November 1-7, 1992
RedacteurenR.W. Joyner
Plaats van productieDordrecht
UitgeverijKluwer Academic Publishers
Pagina's113-131
ISBN van geprinte versie0-7923-2284-3
StatusGepubliceerd - 1993

Publicatie series

NaamNATO ASI Series, Series C: Mathematical and Physical Sciences
Volume398
ISSN van geprinte versie0258-2023

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  • Citeer dit

    Santen, van, R. A., Kramer, G. J., & Jacobs, W. P. J. H. (1993). Theory of Broensted acidity in zeolites. In R. W. Joyner (editor), Elementary reaction steps in heterogeneous catalysis : proceedings of the NATO advanced research workshop, Bedoin, Vaucluse, France, November 1-7, 1992 (blz. 113-131). (NATO ASI Series, Series C: Mathematical and Physical Sciences; Vol. 398). Kluwer Academic Publishers.