Promotion of methane ignition by the laser heating of suspended nanoparticles

The influence of laser heated iron and carbon nanoparticles on ignition of 20 vol% stoichiometric methane-oxygen mixture in argon was studied experimentally in shock tube reactor. The concentration of nanoparticles 0.3-2.0 ppm was measured by laser light extinction. The particles were heated by Nd:Y...

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Bibliographic Details
Published in:Journal of physics. Conference series 2018-01, Vol.946 (1), p.12064
Main Authors: Drakon, A V, Eremin, A V, Gurentsov, E V, Mikheyeva, E Yu, Musikhin, S A, Selyakov, I N
Format: Article
Language:English
Subjects:
Argon
Chemiluminescence
Decomposition reactions
Delay time
Flammability
Ignition
Iron
Laser beam heating
Laser induced incandescence
Lasers
Methane
Nanoparticles
Neodymium lasers
Physics
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Summary:The influence of laser heated iron and carbon nanoparticles on ignition of 20 vol% stoichiometric methane-oxygen mixture in argon was studied experimentally in shock tube reactor. The concentration of nanoparticles 0.3-2.0 ppm was measured by laser light extinction. The particles were heated by Nd:Yag laser pulse operated at wavelength 1064 nm. The ignition delay times were registered by increase of OH chemiluminescence and pressure rise. The temperatures of laser heated particles and their sizes were measured by laser induced incandescence technique. The significant decrease of ignition delay times were found at addition of iron particles heated by laser pulse to the combustible mixture at the temperatures less than 1400 K. Analysis performed has shown that the effect supposedly involves catalytic reactions of methane decomposition on the surface of heated particles and allowed estimating their effective activation energy.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/946/1/012064