Influence of zeolite pore structure on catalytic reactivity

A. Runstraat, van de, P.J. Stobbelaar, J. Grondelle, van, L.J. IJzendoorn, van, R.A. Santen, van

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Abstract

The influence of zeolite pore-size and shape on the hydro-isomerization of n-hexane was studied. Computer simulations and kinetic measurements, in combination with Positron Emission Profiling (PEP) experiments have been performed. Results showed that, for zeolites with a Al/Si molar ratio of less than 0.1 acidic protons had the same activity. Differences in reactivity are due to differences in the heat of adsorption. Smaller pores result in a higher steady state concentration of adsorbed substrate and adsorbed alkoxy species. Based on a kinetic model, and using experimental heats of adsorption and theoretical protonation energies, the activation energy of hydro-isomerization of n-hexane was found to be approximately 127 kJ/mol. This is consistent with results of a recent quantum chemical model of reactions catalysed by a zeolite proton.
Original languageEnglish
Title of host publicationProgress in zeolite and microporous materials : proceedings of the 11th International Zeolite Conference, Seoul, Korea
EditorsH. Chon, S.-K. Ihm, Y.S. Uh
Place of PublicationAmsterdam
PublisherElsevier
Pages1253-1260
ISBN (Print)0-444-82344-1
DOIs
Publication statusPublished - 1997
Event11th International Zeolite conference - Seoul, Korea, Democratic People's Republic of
Duration: 12 Aug 199617 Aug 1996
Conference number: 11

Publication series

NameStudies in Surface Science and Catalysis
Volume105
ISSN (Print)0167-2991

Conference

Conference11th International Zeolite conference
Abbreviated titleIZC
CountryKorea, Democratic People's Republic of
CitySeoul
Period12/08/9617/08/96
Other11th International Zeolite conference, Seoul, Korea, 12-17-August 1996

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Runstraat, van de, A., Stobbelaar, P. J., Grondelle, van, J., IJzendoorn, van, L. J., & Santen, van, R. A. (1997). Influence of zeolite pore structure on catalytic reactivity. In H. Chon, S-K. Ihm, & Y. S. Uh (Eds.), Progress in zeolite and microporous materials : proceedings of the 11th International Zeolite Conference, Seoul, Korea (pp. 1253-1260). (Studies in Surface Science and Catalysis; Vol. 105). Amsterdam: Elsevier. https://doi.org/10.1016/S0167-2991(97)80764-1