Influence of time and temperature on the regeneration of PtReIn/[Al.sub.2][O.sub.3] naphtha reforming catalysts

Influence of time and temperature on the regeneration of PtReIn/[Al.sub.2][O.sub.3] naphtha reforming catalysts

The influence of temperature (450-500 °C) and time (1-4 h) of coke combustion on the catalytic properties of PtReIn/[Al.sub.2][O.sub.3] were studied. The results of the cyclohexane dehydrogenation and cyclopentane hydrogenolysis reactions show that the regeneration treatment with diluted oxygen can...

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Bibliographic Details
Published in:Catalysis letters Vol. 144; no. 7; pp. 1178 - 1187
Main Authors: Vicerich, Maria A, Oportus, Marcelo, Benitez, Viviana M, Reyes, Fatricio, Fieck, Carlos L
Format: Journal Article
Language:English
Published: Springer 01-07-2014
Subjects:
Carbocyclic compounds
Catalysts
Cyclohexane
Dehydrogenation
Hydrogenation
Naphtha
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Summary:The influence of temperature (450-500 °C) and time (1-4 h) of coke combustion on the catalytic properties of PtReIn/[Al.sub.2][O.sub.3] were studied. The results of the cyclohexane dehydrogenation and cyclopentane hydrogenolysis reactions show that the regeneration treatment with diluted oxygen can fully recover the activity of the metal function despite some observed segregation of Re and In. In the case of the n-heptane reforming reaction, the regenerated catalysts had lower activity and stability than the fresh ones. The experiments at high temperature in air showed that In prevents the sintering of Pt and Re but at 650 °C a segregation of Re from the Pt-Re phase occurs.
ISSN:1011-372X
1572-879X
DOI:10.1007/s10562-014-1282-9