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Homogeneous conversion of NO$_{x}$ and NH$_{3}$ with CH$_{4}$, CO, and C$_{2}$H$_{4}$ at the diluted conditions of exhaust-gases of lean operated natural gas engines

Schmitt, Steffen; Schwarz, Sabrina 1; Ruwe, Lena; Horstmann, Jacqueline; Sabath, Franziska; Maier, Lubow 2; Deutschmann, Olaf 1,2; Kohse-Höinghaus, Katharina
1 Institut für Technische Chemie und Polymerchemie (ITCP), Karlsruher Institut für Technologie (KIT)
2 Institut für Katalyseforschung und -technologie (IKFT), Karlsruher Institut für Technologie (KIT)

Understanding gas‐phase reactions in model gas mixtures approximating pre‐turbine heavy‐duty natural gas engine exhaust compositions containing NO, NH$_{3}$, NO$_{2}$, CH$_{4}$, CO, and C$_{2}$H$_{4}$ is extremely relevant for aftertreatment procedure and catalyst design and is thus addressed in this work. In a plug‐flow reactor at atmospheric pressure, five different model gas mixtures were investigated in the temperature range of 700‐1 200 K, using species analysis with electron ionization molecular‐beam mass spectrometry. The mixtures were designed to reveal influences of individual components by adding NO$_{2}$, CH$_{4}$, CO, and C$_{2}$H$_{4}$ sequentially to a highly argon‐diluted NO/NH$_{3}$ base mixture. Effects of all components on the reactivity for NO$_{x}$ conversion were investigated both experimentally as well as by comparison with three selected kinetic models. Main results show a significantly increased reactivity upon NO$_{2}$ and hydrocarbon addition with lowered NO conversion temperatures by up to 200 K. Methane was seen to be of dominant influence in the carbon‐containing mixtures regarding interactions between the carbon and nitrogen chemistry as well as formaldehyde formation. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000125349
Veröffentlicht am 28.10.2020
DOI: 10.1002/kin.21435
Zitationen: 6
Web of Science
Zitationen: 4
Zitationen: 6
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Katalyseforschung und -technologie (IKFT)
Institut für Technische Chemie und Polymerchemie (ITCP)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 02.2021
Sprache Englisch
Identifikator ISSN: 0538-8066, 1097-4601
KITopen-ID: 1000125349
HGF-Programm 37.03.01 (POF III, LK 01) Catalysts and Mechanisms
Erschienen in International journal of chemical kinetics
Verlag John Wiley and Sons
Band 53
Heft 2
Seiten 213-229
Vorab online veröffentlicht am 25.10.2020
Schlagwörter ammonia, exhaust gas aftertreatment, gas-phase kinetics, natural gas engines, nitric oxide
Nachgewiesen in Dimensions
Web of Science
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