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Metal Oxides as Catalysts and Adsorbents in Ozone Oxidation of NO.

08:00 EDT 9th April 2019 | BioPortfolio

Summary of "Metal Oxides as Catalysts and Adsorbents in Ozone Oxidation of NO."

NO represents an important group of pollutants that are formed in fuel combustion. As these pollutants cause significant environmental problems, removal of NO from exhaust gases is necessary. The present study investigated the influence of metal oxide powders on the removal of NO by oxidation with ozone. The aim of the study was to compare the catalytic effect of TiO, AlO and FeO and to investigate the dependence of the effective rate constant on temperature. 400 ppm of NO and a variable concentration of ozone in a mixture of N and O was directed through the catalyst chamber, heated to 60-140 °C. The addition of metal oxides resulted in a significant increase in the efficiency of the oxidation of NO to NO. FeO had the largest effect with a maximum of approximately three-fold increase in the effective rate constant at 100 °C. At the same time FeO had the lowest NO adsorption capacity. In case of all metal oxides, oxidation of NO to NO caused an abrupt increase in adsorption of NO.

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Name: Environmental science & technology
ISSN: 1520-5851
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