The macrostructure and transformations of cobalt oxide catalyst for ammonia oxidation

• Autorzy: Schmidt-Szałowski, K. , Krawczyk, K. , Petryk, J.
• Języki publikacji: EN

Abstrakty

EN

Cobalt catalysts may be used in the future for ammonia oxidation to NO instead of platinum gauze. A new catalyst of high and stable activity and selectivity has been obtained from Co(3)On. On this catalyst much less nitrous oxide is produced than on platinum gauze. The effect of heat treatment of the catalyst's granules, made of CO(3)O(4) with organic binder, on their final composition and macrostructure has been studied (within 1000-l250°C). It has been found that the macrostructure of the catalyst has an essential effect on its activity and selectivity. The conversion of Co(3)O(4) into the inactive oxide CoO, proceeding in the reacting gas mixture of low ammonia conversion, is the main cause of the cobalt catalyst deactivation which is, however, reversible.

Słowa kluczowe

PL

amoniak; utlenianie; katalizator; tlenek kobaltu

EN

ammonia; oxidation; catalyst; cobalt oxide

• Czasopismo: Polish Journal of Applied Chemistry
• Rocznik: 1999
• Tom: Vol. 43, nr 1-2
• Strony: 29-45
• Opis fizyczny: Bibliogr. 24 poz.

Twórcy

autor

Schmidt-Szałowski, K.

• Department of Chemistry, Warsaw University of Technology, Koszykowa 75, 00-664 Warszawa, Poland

autor

Krawczyk, K.

• Department of Chemistry, Warsaw University of Technology, Koszykowa 75, 00-664 Warszawa, Poland

autor

Petryk, J.

• Department of Chemistry, Warsaw University of Technology, Koszykowa 75, 00-664 Warszawa, Poland

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