Autoignition of Methane–Hydrogen Mixtures below 1000 K

In the range of 800–1200 K, both experiments and kinetic modeling demonstrate a significant difference in the dependence of the ignition delay time of methane and hydrogen on pressure and temperature, with the complex influence of these parameters on the autoignition delay time of methane–hydrogen–a...

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Bibliographic Details
Published in:Processes 2022-11, Vol.10 (11), p.2177
Main Authors: Arutyunov, Vladimir, Belyaev, Andrey, Arutyunov, Artem, Troshin, Kirill, Nikitin, Aleksey
Format: Article
Language:English
Subjects:
Alternative energy sources
Analysis
Carbon dioxide
Delay time
Dependence
Energy efficiency
Energy resources
Fuel cells
High temperature
Hydrogen
Ignition
Low temperature
Methane
Mixtures
Oxidation
Radicals
Spontaneous combustion
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Summary:In the range of 800–1200 K, both experiments and kinetic modeling demonstrate a significant difference in the dependence of the ignition delay time of methane and hydrogen on pressure and temperature, with the complex influence of these parameters on the autoignition delay time of methane–hydrogen–air mixtures. In connection with the prospects for the widespread use of methane–hydrogen mixtures in energy production and transport, a detailed analysis of their ignition at temperatures below 1000 K, the most important region from the point of view of their practical application, is carried out. It is shown that such a complex behavior is associated with the transition in this temperature range from low-temperature mechanisms of oxidation of both methane and hydrogen, in which peroxide radicals and molecules play a decisive role, to high-temperature mechanisms of their oxidation, in which simpler radicals dominate. A kinetic interpretation of the processes occurring in this case is proposed.
ISSN:2227-9717
2227-9717
DOI:10.3390/pr10112177