INCAPE   05401
INSTITUTO DE INVESTIGACIONES EN CATALISIS Y PETROQUIMICA "ING. JOSE MIGUEL PARERA"
Unidad Ejecutora - UE
artículos
Título:
Ba,K,Co/CeO2 catalysts for NOx traps: effect of preparation procedure
Autor/es:
MARÍA ARIELA PERALTA; BÁRBARA SABRINA SÁNCHEZ; MARÍA ALICIA ULLA; CARLOS ALBERTO QUERINI
Revista:
APPLIED CATALYSIS A-GENERAL
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Año: 2011 vol. 393 p. 184 - 188
ISSN:
0926-860X
Resumen:
Ba,K,Co/CeO2 catalysts for diesel soot and NOx abatement were studied. Different preparation procedures
were analyzed, varying the cobalt precursor and the order of their impregnation. The catalyst interaction
with NO+O2 was studied using a microbalance and testing in both NO+O2 and He atmospheres. Fourier
Transformed Infrared Spectroscopy (FTIR) and X-Ray Diffraction (XRD) were used to characterize the
catalysts. The behavior of these catalysts as NOx traps was different. It was found that when cobalt
nitrate was added to the Ba,K/CeO2 catalyst, a high NOx adsorption capacity was obtained and, what is
even more interesting, that the decomposition of the nitrated species occurred at lower temperature. The
identification by XRD of a perovskite BaCoO3 formed upon this preparation procedure was considered to
be responsible for the different behavior observed in this particular catalyst.