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Characterization of MnO-doped lanthanum hexaluminate (LaMnAl11O19) in terms of selective catalytic reduction of NOx by addition of hydrocarbon reductant (HC-SCR)

Stranzenbach, Mathias and Saruhan, Bilge (2005) Characterization of MnO-doped lanthanum hexaluminate (LaMnAl11O19) in terms of selective catalytic reduction of NOx by addition of hydrocarbon reductant (HC-SCR). In: Ceramic Science and Engineering Proceedings, 26 (8), pp. 3-10. The American Ceramic Society. 29th Int. Conference on Advance Materials and Coatings, 2005-01-22 - 2005-01-27, Cocoa Beach, Orlanda, Florida.

Full text not available from this repository.

Official URL: http://www.x-cd.com/papers/cesp_v26_i8_003.pdf

Abstract

Environmental pollution by vehicles, turbines and aircrafts has enormously increased in the last decade. New generation lean-burn combustion engines which are more effective and require less fuel consumption will raise the emission of nitrogen oxides (NOX) even more. Thus, especially in urban areas, more stringed environmental regulations are to release which can only be met by development of new catalytic materials and concepts. Rare earth oxide catalysts are reported to offer highly effective conversion of NOX by methane (CH4) in the terms of selective catalytic reduction (HC-SCR). Especially La2Oa is reported to have a high NO reduction by CH4 to N2, although its technical realization as catalyst material has not yet reported and can be challenging due to the hydroscopic property of La2O3. Complex oxide compounds containing La2Oa however can be suitable alternatives and promising candidates for technical application as catalysts. In this study, LaMnAlnOi9 is characterized in terms of HC-SCR with methane. Phase and morphological characterization of the powder synthesized by sol-gel route and coatings by electron-beam physical vapor deposition (EB-PVD) deposition was presented. LaMnAlnOi9 crystallizes to the magnetoplumbite phase at about 1000°C and is then thermally stabile up to 1400°C. FTIR spectra of pressed sol-gel powder showed that NO is adsorbed superficially and oxidized by the surface. The addition of oxygen led to changes of the spectrum in the nitritenitrate region and the formation of NO+ and N2O4 species. The EB-PVD coated LaMnAlnOi9 layer was catalytically characterized at 200°, 400° and 600 °C and showed catalytic activity towards NO depending on temperature.

Item URL in elib:https://elib.dlr.de/20121/
Document Type:Conference or Workshop Item (Speech)
Title:Characterization of MnO-doped lanthanum hexaluminate (LaMnAl11O19) in terms of selective catalytic reduction of NOx by addition of hydrocarbon reductant (HC-SCR)
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Stranzenbach, MathiasUNSPECIFIEDUNSPECIFIED
Saruhan, BilgeUNSPECIFIEDUNSPECIFIED
Date:26 January 2005
Journal or Publication Title:Ceramic Science and Engineering Proceedings
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:26
Page Range:pp. 3-10
Publisher:The American Ceramic Society
Status:Published
Keywords:Catalytic convertor, NOx-reduction
Event Title:29th Int. Conference on Advance Materials and Coatings
Event Location:Cocoa Beach, Orlanda, Florida
Event Type:international Conference
Event Dates:2005-01-22 - 2005-01-27
Organizer:The American Ceramic Society
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:Propulsion Systems (old)
DLR - Research area:Aeronautics
DLR - Program:L ER - Engine Research
DLR - Research theme (Project):E - Gasturbine (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > High Temperature and Functional Coatings
Deposited By: Saruhan-Brings, Dr. Bilge
Deposited On:24 Aug 2007
Last Modified:14 Jan 2010 20:24

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