Catalytic performance of CuO/Ce0.8Zr0.2O2 loaded onto SiC-DPF in NOx-assisted combustion of diesel soot


Autoria(s): Quiles-Díaz, Susana; Giménez Mañogil, Javier; Garcia-Garcia, Avelina
Contribuinte(s)

Universidad de Alicante. Departamento de Química Inorgánica

Universidad de Alicante. Instituto Universitario de Materiales

Materiales Carbonosos y Medio Ambiente

Data(s)

11/02/2015

11/02/2015

02/02/2015

Resumo

This work presents a comparative study between the catalytic performance of the 2% CuO/ceria-zirconia powder catalyst and the same catalyst supported on silicon carbide DPF (Diesel Particulate Filter) towards NO oxidation reaction and soot combustion reaction. The ceria-zirconia catalyst was prepared by the co-precipitation method and 2 wt% copper was incorporated by the incipient wetness impregnation method. The catalyst was incorporated onto the ceramic support using a simple and organic solvent-free procedure by a simply dipping the DPF into an aqueous solution of the catalyst. The powder catalyst has been characterized using N2 adsorption at −196 °C, XRD and Raman Spectroscopy; whereas the catalytic coating morphology has been evaluated by SEM and the mechanical stability by an adherence test. Both catalyst configurations were tested for NO oxidation to NO2 and for soot combustion under NOx/O2. The results revealed that incorporation of the very active copper/ceria-zirconia catalyst onto SiC-DPF has been successfully achieved by a simple coating procedure. Furthermore, the catalytic coating has shown suitable mechanical, chemical and thermal stability. A satisfactory catalytic performance of the catalytic-coated filter was reached towards the NO oxidation reaction. Moreover, it was proved that the catalytic coating is stable and the corresponding coated DPF can be reused for several cycles of NO oxidation without a significant decrease in its activity. Finally, it was verified that the loose-contact mode is a good choice to simulate the catalytic performance of this active phase in a real diesel particulate filter.

The authors gratefully acknowledge the financial support of Generalitat Valenciana (PROMETEOII/2014/010 project), the Spanish Ministry of Economy and Competitiveness (CTQ2012-30703 project, UE-FEDER funding). S.Q.D. wishes to thank VIDI-University of Alicante her Master Thesis Grant.

Identificador

RSC Advances. 2015, 5: 17018-17029. doi:10.1039/C4RA15595E

2046-2069

http://hdl.handle.net/10045/44705

10.1039/C4RA15595E

Idioma(s)

eng

Publicador

Royal Society of Chemistry

Relação

http://dx.doi.org/10.1039/C4RA15595E

Direitos

© Royal Society of Chemistry 2015

info:eu-repo/semantics/openAccess

Palavras-Chave #Catalytic performance #CuO/ceria-zirconia #Silicon carbide DPF #NO oxidation reaction #Soot combustion reaction #Química Inorgánica
Tipo

info:eu-repo/semantics/article