Numerical research of heat and mass transfer during low-temperature ignition of a coal particle

Abstract

Numerical researches have been carried out to study the influence of air flow temperature and a fossil fuel particle rate on sufficient conditions of ignition in a "coal particle - air" system. Developed mathematical model takes into account interconnected processes of heat transfer in a coal particle and gas area, thermal decomposition of organic material, diffusion and gas-phase oxidation of volatiles, heating of a coke (carbon) and its heterogeneous ignition. The effect of low-temperature (about 600 K) ignition for a single coal particle is impossible even at variation of its rate (radius) from 0.05 mm to 0.5 mm. Nevertheless this process is possible for group of particles (two, three, et al.) situated at close-range from each other. The physical aspects of the problem are discussed.

Original language	English
Pages (from-to)	285-294
Number of pages	10
Journal	Thermal Science
Volume	19
Issue number	1
DOIs	https://doi.org/10.2298/TSCI140521107G
Publication status	Published - 2015

Keywords

Coal particle
Heat and mass transfer
Ignition
Low-temperature air flow
Numerical research

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment

Access to Document

10.2298/TSCI140521107G

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title = "Numerical research of heat and mass transfer during low-temperature ignition of a coal particle",

abstract = "Numerical researches have been carried out to study the influence of air flow temperature and a fossil fuel particle rate on sufficient conditions of ignition in a {"}coal particle - air{"} system. Developed mathematical model takes into account interconnected processes of heat transfer in a coal particle and gas area, thermal decomposition of organic material, diffusion and gas-phase oxidation of volatiles, heating of a coke (carbon) and its heterogeneous ignition. The effect of low-temperature (about 600 K) ignition for a single coal particle is impossible even at variation of its rate (radius) from 0.05 mm to 0.5 mm. Nevertheless this process is possible for group of particles (two, three, et al.) situated at close-range from each other. The physical aspects of the problem are discussed.",

keywords = "Coal particle, Heat and mass transfer, Ignition, Low-temperature air flow, Numerical research",

author = "Glushkov, {Dmitrii O.} and Strizhak, {Pavel A.} and Vysokomornaya, {Olga V.}",

year = "2015",

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language = "English",

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AU - Glushkov, Dmitrii O.

AU - Strizhak, Pavel A.

AU - Vysokomornaya, Olga V.

PY - 2015

Y1 - 2015

N2 - Numerical researches have been carried out to study the influence of air flow temperature and a fossil fuel particle rate on sufficient conditions of ignition in a "coal particle - air" system. Developed mathematical model takes into account interconnected processes of heat transfer in a coal particle and gas area, thermal decomposition of organic material, diffusion and gas-phase oxidation of volatiles, heating of a coke (carbon) and its heterogeneous ignition. The effect of low-temperature (about 600 K) ignition for a single coal particle is impossible even at variation of its rate (radius) from 0.05 mm to 0.5 mm. Nevertheless this process is possible for group of particles (two, three, et al.) situated at close-range from each other. The physical aspects of the problem are discussed.

AB - Numerical researches have been carried out to study the influence of air flow temperature and a fossil fuel particle rate on sufficient conditions of ignition in a "coal particle - air" system. Developed mathematical model takes into account interconnected processes of heat transfer in a coal particle and gas area, thermal decomposition of organic material, diffusion and gas-phase oxidation of volatiles, heating of a coke (carbon) and its heterogeneous ignition. The effect of low-temperature (about 600 K) ignition for a single coal particle is impossible even at variation of its rate (radius) from 0.05 mm to 0.5 mm. Nevertheless this process is possible for group of particles (two, three, et al.) situated at close-range from each other. The physical aspects of the problem are discussed.

KW - Coal particle

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KW - Ignition

KW - Low-temperature air flow

KW - Numerical research

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