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 language | English |
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Title of host publication | Progress in zeolite and microporous materials : proceedings of the 11th International Zeolite Conference, Seoul, Korea |
Editors | H. Chon, S.-K. Ihm, Y.S. Uh |
Place of Publication | Amsterdam |
Publisher | Elsevier |
Pages | 1253-1260 |
ISBN (Print) | 0-444-82344-1 |
DOIs | |
Publication status | Published - 1997 |
Event | 11th International Zeolite conference - Seoul, Korea, Democratic People's Republic of Duration: 12 Aug 1996 → 17 Aug 1996 Conference number: 11 |
Publication series
Name | Studies in Surface Science and Catalysis |
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Volume | 105 |
ISSN (Print) | 0167-2991 |
Conference
Conference | 11th International Zeolite conference |
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Abbreviated title | IZC |
Country | Korea, Democratic People's Republic of |
City | Seoul |
Period | 12/08/96 → 17/08/96 |
Other | 11th International Zeolite conference, Seoul, Korea, 12-17-August 1996 |