Abstract
A series of WO3-promoted zirconia supports were synthesized and calcined between 400 and 800C.
Subsequently vanadium oxide was introduced to obtain 3.5 wt% V2O5. The influence of the calcination
temperature and potassium-poisoning (K/V = 0.2, molar ratio) on the catalytic activity in the selective
catalytic reduction (SCR) of NO with NH3 was previously studied. Here, we focus on the influence of these
parameters on the catalytic activity for the undesirable oxidation of ammonia, which decrease the N2
selectivity of the SCR process. It is found that potassium doping of the catalysts results in a considerable
decrease in the overall ammonia conversion while selectivity to NO increases.
Original language | English |
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Journal | Catalysis Communications |
Volume | 10 |
Issue number | 6 |
Pages (from-to) | 803-806 |
ISSN | 1566-7367 |
DOIs | |
Publication status | Published - 2009 |
Keywords
- Crystallinity
- NH3 oxidation
- SCR catalysts
- Potassium
- Tungsten oxide
- Deactivation