Effect the solvent evacuation mode on the catalytic properties of nickel-modified sulfated zirconia catalysts: n-hexane isomerization

This work studies the effect of the evacuation mode of the solvent to optimize the catalytic performances of sulfated zirconia doped with nickel prepared by the sol gel method in one step. Aerogel and xerogel catalysts exhibit different textural, structural and catalytic properties at various calcin...

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Bibliographic Details
Published in:Reaction kinetics, mechanisms and catalysis mechanisms and catalysis, 2014-02, Vol.111 (1), p.199-213
Main Authors: Kamoun, N., Younes, M. K., Ghorbel, A., Mamede, A. S., Rives, A.
Format: Article
Language:English
Subjects:
Aerogels
Catalysis
Catalysts
Chemical Sciences
Chemistry
Chemistry and Materials Science
Industrial Chemistry/Chemical Engineering
Nickel
Physical Chemistry
Sol gel process
Solvents
Xerogels
Zirconium dioxide
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Summary:This work studies the effect of the evacuation mode of the solvent to optimize the catalytic performances of sulfated zirconia doped with nickel prepared by the sol gel method in one step. Aerogel and xerogel catalysts exhibit different textural, structural and catalytic properties at various calcination temperatures. Aerogels, obtained by drying under supercritical conditions of solvent, exhibit a developed specific surface area and stabilize zirconia tetragonal phase before heating and even at high calcination temperature. However, xerogels obtained by ordinary drying in an oven are amorphous and has a low surface area and weak porosity. XPS spectroscopy shows that the nickel in aerogels is more reducible than those in xerogels. Aerogels exhibit higher activity than the xerogels, in the n -hexane isomerization reaction.
ISSN:1878-5190
1878-5204
DOI:10.1007/s11144-013-0638-2