Catalytic Neutralization of NO on a Carbon-Supported Cobalt Oxide Catalyst

✍ Scribed by Dimitar Mehandjiev; Elena Bekyarova

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 241 KB
• Volume: 166
• Category: Article
• ISSN: 0021-9797
• DOI: 10.1006/jcis.1994.1320

✦ Synopsis

The interaction of (\mathrm{NO}) with (\mathrm{CO}) on an active carbon-supported cobalt phase as a catalyst has been investigated at (100-550^{\circ} \mathrm{C}). It is estalltished that the two reductions of (\mathrm{NO}) ( to (\mathrm{N}{2}) and (\mathrm{N}{2} \mathrm{O}) ) depend differently on temperature due to the presence of different aclive sites on which (\mathrm{N}{2}) and (\mathrm{N}{2} \mathrm{O}) are formed. Gas mixtures of (\mathrm{NO}+\mathrm{CO}+\mathrm{Ar}) were used for the catalytic studies and the results were processed by the transient response method. It was established that the highest activity at low temperatures (\left(140-160^{\circ} \mathrm{C}\right)) belonged to the catalyst obtained at (200^{\circ} \mathrm{C}). The temperature dependence of the activity and selectivity of this catalyst showed a reversible maximum associated with a change in the rate-controlling step of the reaction. (1994 Academic Press. inc.