Laser ignition of low-rank coal

Aduev, B. P.; Нурмухаметов, Д. Р.; Nelyubina, N. V.; Kovalev, R. Yu.; Zaostrovskii, A. N.; Ismagilov, Z. R.

doi:10.1134/s1990793116060154

Cited by 16 publications

(8 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Sample glow was collected with lens (8) and recorded with the help of a photoelectron multiplier Hamamatsu H10721-20 (9) and oscillograph LeCroy WaveJet WJ332A (10). The time of laser radiation exposure was governed with the help of pulse generator G5-56 (11). Exposure time was 1 sec.…”

Section: Samples and Experimental Proceduresmentioning

confidence: 99%

“…Recently in our works, we have been investigating the mechanism of coal ignition under the action of the pulses of neodymium laser (λ = 1064 nm) with pulse duration τ i = 120 μs. It has been established that, depending on the energy density of laser pulses, the processes differing from each other in the kinetic and spectral characteristics may be distinguished during the ignition of coal microparticles [11][12][13][14][15][16][17][18][19]. In particular, when the critical energy density H cr (1) is achieved, ignition of torches several micrometers in size is observed on the surface of coal particles.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Ignition of Low-Metamorphized Coal with Continuous Lasers at Wavelengths 450 nm and 808 nm

Aduev

Belokurov

Liskov

et al. 2022

Eurasian Chem. Tech. J.

View full text Add to dashboard Cite

The paper presents the results of a comparative investigation into the kinetic and energy characteristics of the ignition of microparticles of low-metamorphized coal ranks (lignite coal and high volatile C bituminous coal) under the impact of laser radiation at the wavelengths λ = 450 nm and λ = 808 nm with an exposure time of 1 sec. Coal ignition is carried out only during irradiation. There is no transition to stationary combustion. The ignition delay time decreases monotonically with increasing radiation power density. It is established that the energy costs of ignition of the studied coal ranks may be made more economical by using laser radiation with a wavelength of λ = 450 nm. It is concluded from the results of measuring the energy characteristics of coal ignition that the absorption of radiation has a quantum nature. Two components contribute to the coal particles emission spectra measured at the initial stage of ignition: CO (CO2*) flame and thermal glow associated with emitted carbon particles heated to T>2000 K for both coal ranks. At subsequent stages, only the glow of heated carbon particles with the thermal spectrum at T~2000 K is observed in the spectra.

show abstract

Section: Samples and Experimental Proceduresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ignition of Low-Metamorphized Coal with Continuous Lasers at Wavelengths 450 nm and 808 nm

Aduev

Belokurov

Liskov

et al. 2022

Eurasian Chem. Tech. J.

View full text Add to dashboard Cite

show abstract

“…As a result of laser radiation on the coal substance, the fast-flowing thermochemical processes are initiated in it, leading to the release and ignition of volatile matters followed by the carbon skeleton (backbone) combustion. The electro-optical methods were used to record this complex process of igniting coal samples [8][9][10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

“…Three stages of the kinetics of laser ignition of coal with a wide dispersion of 0.2 to 100 μm were established in [12][13][14][15][16]. Each stage has a pronounced threshold character.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, [12][13][14][15][16] show that the process of ignition and combustion of a coal particle has three stages: the heating of a coal particle as a result of the influence of laser radiation and the subsequent development of the thermochemical reactions in a sample, the emission and ignition of the volatiles, the combustion of the coke residue of a coal particle. When exposed to the powerful laser radiation on coal particles, several physical and chemical processes are superimposed, viz.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Investigation of the Laser Radiation Effects on Lignite with the Products Analysis by Mass Spectrometry

Kraft

Нурмухаметов

Aduev

et al. 2020

Eurasian Chem. Tech. J.

View full text Add to dashboard Cite

In this paper, one studied the effect of pulsed laser radiation (1064 nm, 120 μs) on lignite. The method of mass spectrometry was used to analyze the formed gaseous reaction products after the exposing of coal samples to the laser radiation. The pressed out of the pre-milled coal particles tablets were used as samples. In the mass spectra of the reaction products of laser radiation of the samples, the peaks with a mass to ion charge ratio m/z = 2, 18, 44 were detected, that corresponds to the main peaks of H2, H2O, and CO2 molecules. The pattern of formation of the end products CO2, H2, H2O when heating a sample of coal by laser radiation is proposed. The energy release factor is calculated, which is defined as the ratio of the calorific value, released during combustion of the sample to the dose of energy absorbed by the sample during irradiation.

show abstract

Effect of the high-power electromagnetic pulses on the reactivity of the coal-water slurry in hot environment

Belonogov

Taburchinov

Egorov

2020

Chinese Journal of Chemical Engineering

View full text Add to dashboard Cite

Laser ignition of low-rank coal

Cited by 16 publications

References 3 publications

Ignition of Low-Metamorphized Coal with Continuous Lasers at Wavelengths 450 nm and 808 nm

Ignition of Low-Metamorphized Coal with Continuous Lasers at Wavelengths 450 nm and 808 nm

Investigation of the Laser Radiation Effects on Lignite with the Products Analysis by Mass Spectrometry

Effect of the high-power electromagnetic pulses on the reactivity of the coal-water slurry in hot environment

Contact Info

Product

Resources

About