Inhibiting and promoting effects of NO on dimethyl ether and dimethoxymethane oxidation in a plug-flow reactor

Zhang H, Schmitt S, Ruwe L, Kohse-Höinghaus K (2021)
Combustion and Flame 224: 94-107.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Abstract / Bemerkung
The effects of NO addition (1000, 2000 ppm) on the low-temperature oxidation of dimethyl ether (DME) and dimethoxymethane (DMM), as particular cases of oxymethylene ethers (OMEn) with n = 0 and 1, have been investigated in a plug-flow reactor at near-atmospheric pressure in a temperature range of 400-1000 K. An in-situ electron ionization molecular-beam mass spectrometer (EI-MBMS) was used to measure the reactants, intermediates, and products, with particular attention on nitrogenous species that were scarcely detected previously. Explorative modeling with published mechanisms was performed, indicating the necessity of further model development. Potential kinetic fuel/NO interactions are discussed based on the experimental observations. The results reveal an overall inhibiting effect of NO addition on DME reactivity in the low-temperature regime, but a pronounced promoting effect at higher temperatures. For DMM, a similar temperature-dependent effect of NO was observed, but only for high NO concentration (2000 ppm). NO addition significantly suppresses the formation of hydrocarbon intermediates for both DME and DMM, but remarkably promotes the formation of methyl formate and methanol for DME. Several nitrogenous species were detected upon NO addition. The interactions of NO + HO2 and NO + OH, together with the regeneration routes of NO, are thought to be influential for both DME and DMM oxidation, while the significance of the NO + RO2 (R, fuel radical) reaction depends on the reactivity of the respective RO2 radical of DME and DMM. These results contribute to the understanding of OMEn/NO interactions and serve as a basis for further model development by providing new and detailed speciation data for DME/NO and DMM/NO oxidation. (C) 2020 The Combustion Institute. Published by Elsevier Inc. All rights reserved.
Stichworte
Dimethyl ether; Dimethoxymethane; Oxymethylene ethers; Flow reactor; Oxidation; NO addition
Erscheinungsjahr
2021
Zeitschriftentitel
Combustion and Flame
Band
224
Seite(n)
94-107
ISSN
0010-2180
eISSN
1556-2921
Page URI
https://pub.uni-bielefeld.de/record/2951296

Zitieren

Zhang H, Schmitt S, Ruwe L, Kohse-Höinghaus K. Inhibiting and promoting effects of NO on dimethyl ether and dimethoxymethane oxidation in a plug-flow reactor. Combustion and Flame. 2021;224:94-107.
Zhang, H., Schmitt, S., Ruwe, L., & Kohse-Höinghaus, K. (2021). Inhibiting and promoting effects of NO on dimethyl ether and dimethoxymethane oxidation in a plug-flow reactor. Combustion and Flame, 224, 94-107. https://doi.org/10.1016/j.combustflame.2020.08.027
Zhang, H., Schmitt, S., Ruwe, L., and Kohse-Höinghaus, K. (2021). Inhibiting and promoting effects of NO on dimethyl ether and dimethoxymethane oxidation in a plug-flow reactor. Combustion and Flame 224, 94-107.
Zhang, H., et al., 2021. Inhibiting and promoting effects of NO on dimethyl ether and dimethoxymethane oxidation in a plug-flow reactor. Combustion and Flame, 224, p 94-107.
H. Zhang, et al., “Inhibiting and promoting effects of NO on dimethyl ether and dimethoxymethane oxidation in a plug-flow reactor”, Combustion and Flame, vol. 224, 2021, pp. 94-107.
Zhang, H., Schmitt, S., Ruwe, L., Kohse-Höinghaus, K.: Inhibiting and promoting effects of NO on dimethyl ether and dimethoxymethane oxidation in a plug-flow reactor. Combustion and Flame. 224, 94-107 (2021).
Zhang, Hao, Schmitt, Steffen, Ruwe, Lena, and Kohse-Höinghaus, Katharina. “Inhibiting and promoting effects of NO on dimethyl ether and dimethoxymethane oxidation in a plug-flow reactor”. Combustion and Flame 224 (2021): 94-107.

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