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- Title
Ignition and Combustion of Large Coal Particles in Cold Nitrogen–Oxygen Mixtures.
- Authors
Chernenko, A. S.; Kalinchak, V. V.
- Abstract
Forced ignition and subsequent combustion of large coal particles in a cold air and oxygen are investigated experimentally. The critical value of the initial temperature (ignition temperature) of a particle of charcoal and of anthracite is estimated. On preliminary heating of the particle above the ignition temperature, a quasi-stationary mode of combustion is attained after a certain interval of time. For a charcoal particle, depending on the initial density of the particle, either a substantial change in its density or its invariability in the process of combustion in a cold air flow is observed. A relation is suggested allowing one to estimate the critical temperatures of ignition in cold gaseous mixtures depending on oxygen concentration and particle diameter. The absence of ignition of a large anthracite particle in air at room temperature is attributed to the larger value of the activation energy there than in the charcoal particle.
- Subjects
IGNITION temperature; COAL combustion; MIXTURES; AIR flow; CRITICAL temperature; COLD (Temperature)
- Publication
Journal of Engineering Physics & Thermophysics, 2021, Vol 94, Issue 2, p357
- ISSN
1062-0125
- Publication type
Article
- DOI
10.1007/s10891-021-02305-w