Collect. Czech. Chem. Commun. 1979, 44, 1726-1730

Influence of alumina on selectivity of cobalt catalyst for oxidation of ammonia

Antonín Šimečeka, Bohumil Bernauera, Bořivoj Zbuzeka, Jan Vosolsoběa and Ondrej Jurovčákb

a Department of Inorganic Technology, Prague Institute of Chemical Technology, 166 28 Prague 6
b Chemko, 072 22 Strážske


Alumina has been tested as carrier of active component of cobalt catalyst for oxidation of ammonia to nitrogen oxide. Mutual diffusion of the carrier and the active component has been found to take place under the oxidation conditions. In surface layer of the active component CoAl2O4 is formed which shows considerably lower selectivity (with respect to NO) than pure Co3O4. Time stability of the catalyst selectivity on alumina depends on temperature of its pretreatment before introduction of the active component.