Details

Autor(en) / Beteiligte

• Wu, Y.
• Cordier, C.
• Berrier, E.
• Nuns, N.
• Dujardin, C.
• Granger, P.

Titel

Surface reconstructions of LaCo1−xFexO3 at high temperature during N2O decomposition in realistic exhaust gas composition: Impact on the catalytic properties

Ist Teil von

• Applied catalysis. B, Environmental, 2013-08, Vol.140-141, p.151-163

Ort / Verlag

Kidlington: Elsevier B.V

Erscheinungsjahr

2013

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• •Solid solutions for as-prepared LaCo1−xFexO3 perovskite oxides.•N2O decomposition under realistic exhaust gas from nitric acid plant.•Impact of high NO concentration on the activity and stability of LaCo1−xFexO3.•Improved stability after iron incorporation to LaCoO3. This study is dedicated to the development of thermally stable LaCo1−xFexO3 perovskite based catalysts for the decomposition of N2O at medium and high temperature, in representative compositions of exhaust gas from ammonia burner in nitric acid plants. In these specific conditions, N2O coexists with a large amount of NOx. Up to now, lab-scale investigations were usually restricted to low amount of NOx and water while both can originate drastic changes in the catalytic performances related to activation/deactivation phenomena. The impact of NO concentration in terms of activity and stability has been discussed at moderate temperature and correlated to extensive bulk and surface characterization from different techniques (X-ray diffraction, Raman spectroscopy, XPS, Mössbauer spectroscopy, Tof-SIMS). It was found that the catalytic performances in terms of activity and stability depend on the relative concentration of Co with the best performances recorded on LaCo0.2Fe0.8O3.