Effect of pretreatment conditions on the catalytic activity of coprecipitated Ce0.5Zr0.5O2 catalyst in soot oxidation |
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| Authors: | N. V. Zaletova A. O. Turakulova S. V. Kutsev V. V. Lunin |
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| Affiliation: | (1) Chair of Physical Chemistry, Moscow State University, Moscow, 119192, Russia;(2) Institute for Physical Chemistry of Ceramics, Russian Academy of Sciences, Ozernaya ul. 48, Moscow, 119361, Russia |
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| Abstract: | The temperature of soot oxidation and efficiency of Ce0.5Zr0.5O2 catalyst depends on its morphology, which determines the area of intergranular contact between the solid substrate and the catalyst. The temperature-programmed reduction in hydrogen to 1000°C and oxidation at 500°C (redox cycles) cause the mobility of oxygen in oxide to be enhanced and decrease the temperature of soot combustion. Oxidation of soot in the air flow on the Ce0.5Zr0.5O2 catalyst result in its activation. Reuse of the catalyst decreases the temperature of soot oxidation. |
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