Potassium-copper perovskite catalysts for mild temperature diesel soot combustion

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Title: Potassium-copper perovskite catalysts for mild temperature diesel soot combustion
Authors: López Suárez, Franz Edwin | Bueno López, Agustín | Illán-Gómez, María José | Trawczynski, Janusz
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: Diesel soot combustion | Potassium-copper catalyst | Perovskite
Knowledge Area: Química Inorgánica
Issue Date: 5-Sep-2014
Publisher: Elsevier
Citation: Applied Catalysis A: General. 2014, 485: 214-221. doi:10.1016/j.apcata.2014.07.037
Abstract: The activity and stability of potassium-copper perovskite catalysts for soot combustion were analysed at 450 °C in a NOx/O2 gas mixture. Both impregnated (K-Cu/SrTiO3) and substituted (SrKTiCuO3) copper-potassium catalysts were prepared. For comparative purpose, also a potassium substituted catalyst (SrKTiO3) was studied. The high activity of the fresh potassium catalyst (SrKTiO3) is based on the volatile potassium species reaching the surface of soot. However, this catalyst is not useful because potassium is progressively lost during the reaction. Potassium was stabilized by copper and, as a consequence, the two potassium-copper perovskite catalysts present a constant activity for the soot combustion. The activity of the potassium-copper perovskite catalysts, which is maintained during consecutive reactions, is related to their NO2 production capacity. The metal addition method seems to influence the catalysts performance, the substituted catalyst (SrKTiCuO3) being the most active and stable.
Sponsor: The authors gratefully acknowledge the financial support of the Spanish Government (MINECO, Project CTQ2012-030703) and of the FEDER funding.
URI: http://hdl.handle.net/10045/44751
ISSN: 0926-860X (Print) | 1873-3875 (Online)
DOI: 10.1016/j.apcata.2014.07.037
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2014 Elsevier B.V.
Peer Review: si
Publisher version: http://dx.doi.org/10.1016/j.apcata.2014.07.037
Appears in Collections:INV - MCMA - Artículos de Revistas

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