Synthesis, characterization and catalytic properties of the cobalt and nickel supported on HZSM-12 zeolite

Bifunctional catalysts consisting of cobalt and nickel supported on HZSM-12 zeolite were prepared and characterized using chemical analysis, XRD, FTIR, SSA and TPR experiments. Thermodesorption of n-butylamine was used to determine the acid sites densities. The results obtained by XRD and FTIR showe...

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Bibliographic Details
Published in:Catalysis communications 2006-10, Vol.7 (10), p.791-796
Main Authors: Pedrosa, A.M. Garrido, Souza, M.J.B., Silva, A.O.S., Melo, D.M.A., Araujo, A.S.
Format: Article
Language:English
Subjects:
Cobalt
HZSM-12 zeolite
n-Hexane isomerization
Nickel
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Summary:Bifunctional catalysts consisting of cobalt and nickel supported on HZSM-12 zeolite were prepared and characterized using chemical analysis, XRD, FTIR, SSA and TPR experiments. Thermodesorption of n-butylamine was used to determine the acid sites densities. The results obtained by XRD and FTIR showed that the impregnation method used did not change the structure of HZSM-12 zeolite. For the other hand, SSA results indicated that the impregnation method used decreased the micropore surface area. Metal reduction started at approximately 379 °C for Co ∗/HZSM-12 and 469 °C for Ni ∗/HZSM-12 catalysts. The n-butylamine thermodesorption indicated the presence of weak, medium and strong acid sites. Bifunctional catalysts were active in n-hexane isomerization with a medium selectivity to branched hydrocarbons.
ISSN:1566-7367
1873-3905
DOI:10.1016/j.catcom.2006.02.012