In the present work the soot combustion activity of CeO 2 doped with lanthanum hydroxide, as surface promoter, has been investigated. TGA experiments, run under different conditions, show that, in the presence of lanthana, the reaction of soot starts at low temperature (579 K) due to the possibility to form carbonate species. The emission of CO 2 is delayed due to the strong interaction with lanthana. A mechanism of reaction involving a carbonate route is proposed.
Promotional effect of surface Lanthanum in soot oxidation over ceria-based catalysts
ANEGGI, Eleonora;DE LEITENBURG, Carla;DOLCETTI, Giuliano;TROVARELLI, Alessandro
2007-01-01
Abstract
In the present work the soot combustion activity of CeO 2 doped with lanthanum hydroxide, as surface promoter, has been investigated. TGA experiments, run under different conditions, show that, in the presence of lanthana, the reaction of soot starts at low temperature (579 K) due to the possibility to form carbonate species. The emission of CO 2 is delayed due to the strong interaction with lanthana. A mechanism of reaction involving a carbonate route is proposed.File in questo prodotto:
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