MnOx-CeO2 catalysts with different compositions have been investigated as catalysts for low temperature SCR by preparing a series of samples by the Solution Combustion Synthesis (SCS) method. Variable amounts of two different organic fuels (glycine and citric acid) with respect to the stoichiometry of synthesis were investigated. The samples were characterized by XRD, BET, H2-TPR, XPS, FESEM and their catalytic activity tested for NOx abatement in the range of temperature of interest (120-350 °C). By varying the synthesis parameters it was possible to obtain catalysts different in terms of structure, morphology, specific surface area, Mn average oxidation state as well as superficial content of Mn, Ce and O atoms. These features were correlated with the resulting catalytic performances in the SCR reaction and compared to pure MnOx phases obtained through the same synthesis method. All the developed catalysts were considerably active in the temperature range investigated and could be considered suitable for the low-temperature SCR process. The sample with the higher content of manganese oxide obtained with glycine in below-stoichiometric amount showed the best performance in terms of NOx conversion and N2 yield, likely due to the high reducibility as well as the presence of Mn3O4 phase.
MnOx-CeO2 catalysts synthesized by solution combustion synthesis for the low-temperature NH3-SCR / Andreoli, Silvia; Deorsola, FABIO ALESSANDRO; Pirone, Raffaele. - In: CATALYSIS TODAY. - ISSN 0920-5861. - STAMPA. - 253:(2015), pp. 199-206. [10.1016/j.cattod.2015.03.036]
MnOx-CeO2 catalysts synthesized by solution combustion synthesis for the low-temperature NH3-SCR
ANDREOLI, SILVIA;DEORSOLA, FABIO ALESSANDRO;PIRONE, RAFFAELE
2015
Abstract
MnOx-CeO2 catalysts with different compositions have been investigated as catalysts for low temperature SCR by preparing a series of samples by the Solution Combustion Synthesis (SCS) method. Variable amounts of two different organic fuels (glycine and citric acid) with respect to the stoichiometry of synthesis were investigated. The samples were characterized by XRD, BET, H2-TPR, XPS, FESEM and their catalytic activity tested for NOx abatement in the range of temperature of interest (120-350 °C). By varying the synthesis parameters it was possible to obtain catalysts different in terms of structure, morphology, specific surface area, Mn average oxidation state as well as superficial content of Mn, Ce and O atoms. These features were correlated with the resulting catalytic performances in the SCR reaction and compared to pure MnOx phases obtained through the same synthesis method. All the developed catalysts were considerably active in the temperature range investigated and could be considered suitable for the low-temperature SCR process. The sample with the higher content of manganese oxide obtained with glycine in below-stoichiometric amount showed the best performance in terms of NOx conversion and N2 yield, likely due to the high reducibility as well as the presence of Mn3O4 phase.File | Dimensione | Formato | |
---|---|---|---|
1-s2.0-S0920586115002059-main.pdf
accesso riservato
Tipologia:
2a Post-print versione editoriale / Version of Record
Licenza:
Non Pubblico - Accesso privato/ristretto
Dimensione
1.84 MB
Formato
Adobe PDF
|
1.84 MB | Adobe PDF | Visualizza/Apri Richiedi una copia |
Pubblicazioni consigliate
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
https://hdl.handle.net/11583/2603983
Attenzione
Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo