Ignition of Coals with Continuous-Wave Lasers at Wavelengths of 450 and 808 nm

The kinetic and energy characteristics of the ignition of microparticle powders of coals of G (gas), Zh (fat), and K (coking) grades with a bulk density of 0.4 g/cm 3 under the action of continuous-wave laser radiation at wavelengths λ = 450 and 808 nm with an exposure time of 1 s were measured. Coa...

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Bibliographic Details
Published in:Solid fuel chemistry 2023-06, Vol.57 (3), p.170-177
Main Authors: Aduev, B. P., Belokurov, G. M., Liskov, I. Yu, Ismagilov, Z. R.
Format: Article
Language:English
Subjects:
Bulk density
Chemistry
Chemistry and Materials Science
Coking
Continuous wave lasers
Delay time
Energy consumption
Flame propagation
Ignition
Microparticles
Physical Chemistry
Wavelengths
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Summary:The kinetic and energy characteristics of the ignition of microparticle powders of coals of G (gas), Zh (fat), and K (coking) grades with a bulk density of 0.4 g/cm 3 under the action of continuous-wave laser radiation at wavelengths λ = 450 and 808 nm with an exposure time of 1 s were measured. Coals were ignited only under irradiation, and the effect of flame propagation was absent. Ignition delay times were measured as a function of the radiation power density, and the critical values of the coal ignition energy density were determined. Energy consumption for the ignition of coals with radiation at λ = 808 nm was greater than that at λ = 450 nm for all grades of coals. It was established that the absorption of laser radiation by coal samples had a quantum character.
ISSN:0361-5219
1934-8029
DOI:10.3103/S036152192304002X