Artículo
Influence of the synthetic conditions on the composition, morphology of CuMgAl hydrotalcites and their use as catalytic precursor in diesel soot combustion reactions
Comelli, Nora Alejandra
; Ruiz, Maria Lucia
; Leguizamón Aparicio, María Silvia del Valle
; Merino, Nora Andrea
; Cecilia, Juan Antonio; Rodríguez Castellón, Enrique; Lick, Ileana Daniela
; Ponzi, Marta Isabel
Fecha de publicación:
06/2018
Editorial:
Elsevier Science
Revista:
Applied Clay Science
ISSN:
0169-1317
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
In this work, a series of Cu-Mg-Al hydrotalcites and the oxide mixture obtained by their calcination at 600 °C were synthesized by coprecipitation from metal nitrates. The effect of the coprecipitation temperature of the precursor on the structure and texture of these materials was investigated. The solids were characterised by inductively coupled plasma (ICP), atomic absorption spectrophotometry (AAS), an energy dispersive spectrometer (EDAX), thermogravimetric analysis (TGA-DTA), X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and Fourier transform infrared spectroscopy (FTIR). It has been studied the activity of these solids as catalysts for diesel soot combustion. The materials are formed by nanoparticles, and the coprecipitation temperature has influence in the morphology of hydrotalcites. Moreover, the catalytic performance of calcinated solids is influenced by the synthesis conditions. A low temperature coprecipitation is beneficial for the diesel soot combustion. In this sense, the solid obtained by coprecipitacion at 40 °C shows the best catalytic activity (Tmax = 375 °C). This catalyst contains cooper oxides, potassium and nitrate ions which can acts as promoters of the soot combustion. The studied solids showed activity and high resistance to the deactivation caused by hydro-treatment.
Palabras clave:
CATALYSIS
,
CUMGAL HYDROTALCITES
,
DIESEL
,
SOOT COMBUSTION
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Identificadores
Colecciones
Articulos(CINDECA)
Articulos de CENTRO DE INV EN CS.APLICADAS "DR.JORGE J.RONCO"
Articulos de CENTRO DE INV EN CS.APLICADAS "DR.JORGE J.RONCO"
Articulos(INTEQUI)
Articulos de INST. DE INVEST. EN TECNOLOGIA QUIMICA
Articulos de INST. DE INVEST. EN TECNOLOGIA QUIMICA
Citación
Comelli, Nora Alejandra; Ruiz, Maria Lucia; Leguizamón Aparicio, María Silvia del Valle; Merino, Nora Andrea; Cecilia, Juan Antonio; et al.; Influence of the synthetic conditions on the composition, morphology of CuMgAl hydrotalcites and their use as catalytic precursor in diesel soot combustion reactions; Elsevier Science; Applied Clay Science; 157; 6-2018; 148-157
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