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

Research output: Contribution to journalArticle

27 Citations (Scopus)

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 languageEnglish
Pages (from-to)285-294
Number of pages10
JournalThermal Science
Volume19
Issue number1
DOIs
Publication statusPublished - 2015

Fingerprint

Ignition
Mass transfer
Coal
Heat transfer
Air
Gases
Fossil fuels
Coke
Temperature
Pyrolysis
Mathematical models
Heating
Oxidation
Carbon

Keywords

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

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment

Cite this

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AU - Glushkov, Dmitrii O.

AU - Strizhak, Pavel A.

AU - Vysokomornaya, Olga V.

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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.

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