Author： Kintaichi Y. Haneda M. Inaba M. Hamada H.
Publisher： Springer Publishing Company
ISSN： 1011-372X
Source： Catalysis Letters, Vol.48, Iss.1-2, 1997-10, pp. : 121-127
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Abstract
The catalytic activity of indium-supported TiO2- ZrO2 binary metal oxide for the selective reduction of NO with propene in the presence of oxygen was investigated. The supported indium caused a drastic enhancement of NO reduction activity of TiO2-ZrO2. It was suggested that the ``dispersed phase'' of indium oxide, which is reduced at lower temperature in temperature-programmed reduction (TPR), is responsible for the high activity. Propene served as the most efficient reducing agent, while oxygenated hydrocarbons were not good ones. A reaction mechanism was proposed that N2 is formed through the reaction of propene and NO2, which was formed on the acid sites of TiO2-ZrO2, on the indium sites.
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