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Promotion of iron-oxide with potassium as optimization of the soot combustion catalyst

Legutko P., Stelmachowski P., Kotarba A.

Challenges of Modern Technology

2012

Vol. 3, no. 2

9--11

In this work the effect of potassium addition to iron oxides (FeO, Fe3O4, Fe2O3) as catalysts for soot combustion was investigated. While the addition of potassium by impregnation had positive effect on all oxides the strength of this effect varied considerably. Comparison with potassium ferrites (K2Fe22O34, KFeO2), with potassium as a part of a crystal lattice, proved that they were more active than unpromoted oxides. The determined range of activity was as follows: FeO < Fe3O4 Fe2O3 K/Fe34 ~ K2Fe22O34 K/Fe2O3 K/FeO ~FeO2.

Application of Kelvin method and mass spectrometry for investigation of oxide catalyst surface properties

Maniak G., Stelmachowski P.

Challenges of Modern Technology

2010

Vol. 1, no. 1

11--13

Many oxides are applied as a catalysts for commercially important processes. Recently, decomposition of nitrous oxide into nitrogen and oxygen have became a topic of vital interest for catalytic chemistry. Two possible ways of deN2O reaction, low temperature and high-temperature, can be distinguished. Promising results were obtained for spinel oxides which contained cobalt. Because of cationic redox route, triggered by electron transfer, of N2O decomposition over these oxides, investigation of their electronic properties was justifi ed. Th erefore the work function measurements, using Kelvin method were carried out. Moreover in-situ monitoring of processes occurred at catalyst’s surface was performed using mass spectrometry.

Katalizator do niskotemperaturowego rozkładu tlenku azotu(I) ze strumienia gazów resztkowych z instalacji kwasu azotowego

Inger M., Saramok M., Wilk M., Stelmachowski P., Zasada F., Maniak G., Piskorz W., Adamski A., Kotarba A., Sojka Z., Granger P.

Przemysł Chemiczny

2009

T. 88, nr 12

1307-1313