On deactivation of CrOx/La2O3/ZrO2 catalyst during n-octane dehydrocyclisation. I. Investigation of dehydrogenation capability by the homomolecular H-D exchange of molecular hydrogen

Based on the time on stream dependence of product distribution during deactivation and on additional investigations of fresh and deactivated samples by the homomolecular H–D exchange of molecular hydrogen, it is concluded, that the deactivation during n‐octane dehydrocyclisation on CrOx/La2O3/ZrO2 c...

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Bibliographic Details
Published in:Catalysis letters 2000-01, Vol.70 (1-2), p.23-26
Main Authors: EHWALD, Hermann, LEIBNITZ, Ursula, LIESKE, Heiner
Format: Article
Language:English
Subjects:
Catalysis
Catalysts
Catalysts: preparations and properties
Chemistry
Deactivation
Dehydrogenation
Exact sciences and technology
Exchanging
General and physical chemistry
Lanthanum oxides
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
Time dependence
Zirconium dioxide
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Summary:Based on the time on stream dependence of product distribution during deactivation and on additional investigations of fresh and deactivated samples by the homomolecular H–D exchange of molecular hydrogen, it is concluded, that the deactivation during n‐octane dehydrocyclisation on CrOx/La2O3/ZrO2 catalysts is caused by a decreasing dehydrogenation capability of the active surface and not by increasing mass transport resistance.
ISSN:1011-372X
1572-879X
DOI:10.1023/a:1019071301462