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The Influence of the External Acidity of H-ZSM-5 on Its Shape Selective Properties in the Disproportionation of Ethylbenzene

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons58985

Schüth,  Ferdi
Institut für Anorganische Chemie, Johann Wolfgang Goethe-Universität Frankfurt, Marie Curie-Strasse 11, 60439, Frankfurt, Germany;
Research Department Schüth, Max-Planck-Institut für Kohlenforschung, Max Planck Society;

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Zitation

Melson, S., & Schüth, F. (1997). The Influence of the External Acidity of H-ZSM-5 on Its Shape Selective Properties in the Disproportionation of Ethylbenzene. Journal of Catalysis, 170(1), 46-53. doi:10.1006/jcat.1997.1715.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-0024-3968-7
Zusammenfassung
The shape selectivity of H-ZSM-5 in the disproportionation ofethylbenzene was investigated, using a set of samples with the same Si/Al ratio, but different particle sizes in the range from 0.1 to 80 μm. The number of external acid sites of each samplewas measured gravimetrically by the adsorption of 2,6-dimethylpyridine. The data were correlated with the resultsof catalytic experiments. Conversion and product distributionare strongly dependent on the external acidity which in turncorrelates well with the particle size. An estimate for thediffusion coefficient could be obtained by fitting the effectiveness factor for the different particle sizes