Optimalizace přípravy kobaltových katalyzátorů nanesených na strukturované nosiče pro katalytický rozklad oxidu dusného.

Abstract

This bachelor thesis deals with low-temperature catalytic decomposition of nitrous oxide using catalysts on structured supports. Nitrous oxide is a significant pollutant contribuing to the greenhouse effect and ozone depletion. Decomposition of nitrous oxide using a suitable catalyst is an appropriate way to abate nitrous oxide emissions from stationary sources. For this bachelor thesis, catalysts with the active components of Co3O4/Cs or Co4MnAlOx/K deposited by impregnation on ceramic foams, and catalysts with the active components of Co3O4/Cs deposited by impregnation on ceramic foams with an interlayer (MgO, MnO2, SiO2 or TiO2) were prepared. The catalysts prepared were characterised using XRD and their catalytic activity for the decomposition of nitrous oxide in an inert gas was measured. The effect of the number of active Co3O4/Cs or Co4MnAlOx/K layers deposited and the effect of the interlayer used for one active Co3O4/Cs layer were studied. For both active phases used, the optimal number of layers deposited is one layer. None of the interlayers used increases the activity of the catalyst compared to that of a catalyst with one layer of Co3O4/Cs deposited on a foam without an interlayer.