Characteristics and catalytic properties of alumina-zirconia mixed oxides prepared by a modified Pechini method

A modified Pechini method was used to prepare alumina–zirconia mixed oxides at three different molar ratios. For comparison, pure alumina and pure zirconia were prepared using the same method. The mixed oxides were characterised by the BET method for surface area, X-ray diffraction, CO2 and NH3 temp...

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Bibliographic Details
Published in:Catalysis letters 2005-09, Vol.103 (1-2), p.63-68
Main Authors: SOISUWAN, Patta, CHAMBERS, Dean C, TRIMM, David L, MEKASUWANDUMRONG, Okorn, PANPRANOT, Joongjai, PRASERTHDAM, Piyasan
Format: Article
Language:English
Subjects:
Acetone
Aluminum oxide
Ammonia
Catalysis
Chemistry
Crystal defects
Crystal structure
Exact sciences and technology
General and physical chemistry
Mixed oxides
Propylene
Selectivity
Tetragonal zirconia
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
X-ray diffraction
Zirconium dioxide
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Summary:A modified Pechini method was used to prepare alumina–zirconia mixed oxides at three different molar ratios. For comparison, pure alumina and pure zirconia were prepared using the same method. The mixed oxides were characterised by the BET method for surface area, X-ray diffraction, CO2 and NH3 temperature-programmed desorption. Elimination of 2-propanol was used as a probe reaction to characterise the surface of the mixed oxides. The modified Pechini preparation resulted in a poor acid–base strength of alumina surface resulting in high acetone selectivity where imperfect crystal structure of the tetragonal zirconia favoured high propylene production in 2-propanol elimination at 200 °C.
ISSN:1011-372X
1572-879X
DOI:10.1007/s10562-005-6504-8