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Effect of Fe/Co ratio on the phase composition of Pd-integrated perovskites and its H2-SCR of NOx performance

Mondragón Rodríguez, G.C. and Saruhan, B. (2009) Effect of Fe/Co ratio on the phase composition of Pd-integrated perovskites and its H2-SCR of NOx performance. Applied Catalysis B: Environmental. Elsevier. DOI: 10.1016/j.apcatb.2009.10.004

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Abstract

La-based perovskites doped with palladium were synthesized by a modified citrate route and calcined at high temperature. The Fe/Co-ratio at the B-site of the perovskite (LaFe0.95−xCoxPd0.05O3, x = 0.475, 0.4, 0.3) was intentionally varied in order to produce a single phase catalyst and to correlate the phase(s) variations with its catalytic performance during the H2-SCR of NOx. A mixture of crystal phases containing orthorhombic and cubic perovskites, cobalt oxide and strongly bonded palladium oxide were observed in the sample with Fe/Co = 1. Single orthorhombic perovskite phase with traces of iron oxide and weak bonded palladium oxide was obtained with Fe/Co ≈ 2.2. The perovskite with Fe/Co = 1 displayed better NOx-reductions and N2-selectivities than the perovskite with Fe/Co = 2.2 ratio during dry H2-SCR of NOx. The same was observed with H2O + CO2 and in the presence of CO in the feed. The observed catalytic behaviour of both perovskites is discussed in association with the state of palladium in each investigated composition since the Pd-free perovskite displayed an extremely low NOx-reduction (below 4%).

Item URL in elib:https://elib.dlr.de/60981/
Document Type:Article
Title:Effect of Fe/Co ratio on the phase composition of Pd-integrated perovskites and its H2-SCR of NOx performance
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Mondragón Rodríguez, G.C.DLRUNSPECIFIED
Saruhan, B.DLRUNSPECIFIED
Date:13 October 2009
Journal or Publication Title:Applied Catalysis B: Environmental
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI :10.1016/j.apcatb.2009.10.004
Editors:
EditorsEmail
ELSEVIER, Science DirectUNSPECIFIED
Publisher:Elsevier
Status:Accepted
Keywords:Perovskite; Pd-state; NOx-reduction; Lean conditions
HGF - Research field:Energy
HGF - Program:Efficient Energy Conversion (old)
HGF - Program Themes:E VG - Combustion and Gas Turbine Technologies (old)
DLR - Research area:Energy
DLR - Program:E VG - Combustion and Gas Turbine Technologies
DLR - Research theme (Project):E - Schadstoffe (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > High Temperature and Functional Coatings
Deposited By: Mondragon Rodriguez, Guillermo Cesar
Deposited On:23 Nov 2009 12:05
Last Modified:31 Jul 2019 19:25

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