Diesel soot combustion ceria catalysts

Please use this identifier to cite or link to this item: http://hdl.handle.net/10045/37697
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Title: Diesel soot combustion ceria catalysts
Authors: Bueno López, Agustín
Research Group/s: Materiales Carbonosos y Medio Ambiente
Center, Department or Service: Universidad de Alicante. Departamento de Química Inorgánica | Universidad de Alicante. Instituto Universitario de Materiales
Keywords: DPF regeneration | Soot | Ceria | Doped-ceria | Diesel engine contamination
Knowledge Area: Química Inorgánica
Issue Date: Mar-2014
Publisher: Elsevier
Citation: Applied Catalysis B: Environmental. 2014, 146: 1-11. doi:10.1016/j.apcatb.2013.02.033
Abstract: Different aspects of the ceria-catalyzed Diesel soot combustion reactions have been critically discussed, such as the high catalytic activity of ceria for Diesel soot combustion in comparison to some other potential catalysts, the potential ceria-catalyzed Diesel soot combustion mechanisms (the so-called NO2-assisted mechanism and the active oxygen mechanism) and the effect of ceria doping with suitable cations like those of Pr, La or Zr. Ceria must be doped in order to enhance thermal stability, but ceria doping also changes different physicochemical and catalytic properties of ceria. Zr-doping, for instance, has a double role on ceria as soot combustion catalyst: enhances ceria oxidation capacity of the adsorbed NOx species (positive effect) but stabilizes NO2 on surface (negative effect). The surface properties of a ceria catalyst are usually more important than those of bulk: high surface area/small crystal size usually has a positive effect on the catalyst performance and, in mixed oxides, the surface composition also plays a role. The optimal dopant loading depends on the foreign cation being, for instance, around 5–10%, 20–30% and 50 mol% for La3+, Zr4+, and Pr3+/4+, respectively.
Sponsor: Financial support of Generalitat Valenciana (Project Prometeo 2009/047), the Spanish Ministry of Economy and Competitiveness (Project CTQ2012-30703), and the co-financing of both projects by FEDER resources.
URI: http://hdl.handle.net/10045/37697
ISSN: 0926-3373 (Print) | 1873-3883 (Online)
DOI: 10.1016/j.apcatb.2013.02.033
Language: eng
Type: info:eu-repo/semantics/article
Peer Review: si
Publisher version: http://dx.doi.org/10.1016/j.apcatb.2013.02.033
Appears in Collections:INV - MCMA - Artículos de Revistas

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