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N. V. Zaletova, A. O. Turakulova, S. V. Kutzhev, V. V. Lunin

Factors influencing on the catalytic activity of coprecipitated Ce0.5Zr0.5O2in soot oxidation

Abstract

Ce0.5Zr0.5O2 systems subjected to different pretreatments are studied as catalysts in oxidation of soot. The temperature of soot oxidation and efficiency of the catalyst depend on its morphology, which affects the contact area between solid substrate and catalyst. Redox cycles (TPR 1000°C, oxidation 500°C) are found to enhance oxygen mobility of the system and thus decrease the temperature of soot oxidation. Oxidation of soot in the air flow on the Ce0.5Zr0.5O2 catalyst leads to its activation, reuse of the catalyst decreases the temperature of soot combustion.
Moscow University Chemistry Bulletin.
2009, Vol. 50, No. 1, P. 3
   

Copyright (C) Chemistry Dept., Moscow State University, 2002
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