Regeneration of Coked Al-Promoted Sulfated Zirconia Catalysts by High Pressure Hydrogen

To avoid the inconvenience and danger caused by using air or oxygen as a regenerating gas for coked catalysts, this work proposes an effective regeneration method for the fouled Al-promoted sulfated zirconia (AL/SZ) catalyst. This work tries hydrogen for regenerating fouled catalysts; nevertheless,...

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Bibliographic Details
Published in:Industrial & engineering chemistry research 2010-02, Vol.49 (4), p.1982-1985
Main Authors: Yang, Ying-Chieh, Weng, Hung-Shan
Format: Article
Language:English
Subjects:
Applied sciences
Catalysis
Catalytic reactions
Chemical engineering
Chemistry
Exact sciences and technology
General and physical chemistry
Reactors
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
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Summary:To avoid the inconvenience and danger caused by using air or oxygen as a regenerating gas for coked catalysts, this work proposes an effective regeneration method for the fouled Al-promoted sulfated zirconia (AL/SZ) catalyst. This work tries hydrogen for regenerating fouled catalysts; nevertheless, regaining activity is low when introducing atmospheric hydrogen as a regenerating gas. Fortunately, over 98% of original activity can be regained using high pressure hydrogen (2.1 MPa) at 250 °C within 8 h. The operation temperature for this new regeneration method is much lower than that for conventional methods using air or oxygen as a regenerating gas. This method does not affect the product distribution of n-C4 isomerization.
ISSN:0888-5885
1520-5045
DOI:10.1021/ie900338b