Influence of calcination temperature on Ce/TiO2 catalysis of selective catalytic oxidation of NH3 to N2

•The Ce/TiO2 catalyst (400) shows a great N2 yield in the SCO reaction.•Catalytic activity was dependent on oxidation state of Ce species and oxygen.•The SCO reaction follows an internal SCR mechanism. Herein, 10wt% Ce/TiO2 catalysts were prepared via wet impregnation at different calcination temper...

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Bibliographic Details
Published in:Applied catalysis. A, General General, 2014, Vol.470, p.189-198
Main Authors: Lee, Sang Moon, Lee, Hyun Hee, Hong, Sung Chang
Format: Article
Language:English
Subjects:
Calcination
Calcination temperatures
Catalysis
Catalysts
Ce/TiO2 catalysts
Chemistry
Exact sciences and technology
General and physical chemistry
Internal selective catalytic reduction mechanism
Oxidation
Oxides
Roasting
Selective catalytic oxidation
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
Titanium dioxide
X-ray photoelectron spectroscopy
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Summary:•The Ce/TiO2 catalyst (400) shows a great N2 yield in the SCO reaction.•Catalytic activity was dependent on oxidation state of Ce species and oxygen.•The SCO reaction follows an internal SCR mechanism. Herein, 10wt% Ce/TiO2 catalysts were prepared via wet impregnation at different calcination temperatures and used for selective catalytic oxidation (SCO) of NH3 to N2. The 10wt% Ce/TiO2 catalyst calcined at 400°C showed the highest NH3 conversion (∼96%) and N2 (∼93%) yield (at 350°C). As determined by BET and XRD studies, the ceria oxides existed in either highly dispersed or amorphous phases after preparation at low calcination temperatures (
ISSN:0926-860X
1873-3875
DOI:10.1016/j.apcata.2013.10.057