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An experimental and modeling study on the reactivity of extremely fuel-rich methane/dimethyl ether mixtures

Porras, S.; Kaczmarek, D.; Herzler, J.; Drost, S.; Werler, M.; Kasper, T.; Fikri, M.; Schießl, R.; Atakan, B.; Schulz, C.; Maas, U.

Abstract:
Chemical reactions in stoichiometric to fuel-rich methane/dimethyl ether/air mixtures (fuel air equiva- lence ratio φ=1–20) were investigated by experiment and simulation with the focus on the conversion of methane to chemically more valuable species through partial oxidation. Experimental data from dif- ferent facilities were measured and collected to provide a large database for developing and validating a reaction mechanism for extended equivalence ratio ranges. Rapid Compression Machine ignition delay times and species profiles were collected in the temperature range between 660 and 1052 K at 10 bar and equivalence ratios of φ= 1–15. Ignition delay times and product compositions were measured in a shock tube at temperatures of 630–1500 K, pressures of 20–30 bar and equivalence ratios of φ= 2 and 10. Ad- ditionally, species concentration profiles were measured in a flow reactor at temperatures between 473 and 973 K, a pressure of 6 bar and equivalence ratios of φ= 2, 10, and 20. The extended equivalence ratio range towards extremely fuel-rich mixtures as well as the reaction-enhancing effect of dimethyl ether were studied because of their usefulness for the conversion of methane into chemically valuable species through partial oxidation at these conditions. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000099754
Veröffentlicht am 14.02.2020
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Technische Thermodynamik (ITT)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2020
Sprache Englisch
Identifikator ISSN: 0010-2180, 1556-2921
KITopen-ID: 1000099754
Erschienen in Combustion and flame
Band 212
Seiten 107-122
Vorab online veröffentlicht am 02.11.2019
Schlagwörter Fuel-rich reactions, Rapid compression machine, Shock tube, Flow reactor, Ignition delay time, Species concentration profiles
Nachgewiesen in Web of Science
Scopus
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