Journal article
Analysis of the mechanism of the low-temperature oxidation of coal
Combustion and Flame, Vol.134(1-2), pp.107-117
2003
Abstract
The mechanism of the oxidation of coal at low temperatures, i.e., below 100°C, was examined using measurements of the gases emitted from a bed of coal in an isothermal flow reactor. Employing an online two-column micro gas chromatograph, transient rates of production of CO2 and CO were monitored during desorption and oxidation experiments. A bituminous coal was milled into three nominal top size classes: 0-0.5 mm, 0-1 mm, and 0-2 mm. Desorption experiments with unoxidized coal samples at 20-70°C indicated that even an unoxidized coal incorporates oxygenated complexes in its structure. The threshold for thermal decomposition of these oxygenated species was found to be between 50 and 70°C. Carbon oxides liberated from oxidizing coal were compared with those from the thermal decomposition of coal oxidized at the same temperature, suggesting that two parallel reaction sequences contribute to the emission of carbon oxides during oxidation. A multi-step reaction mechanism was also proposed to describe low-temperature oxidation of coal and to explain the phenomena observed during the desorption and oxidation experiments.
Details
- Title
- Analysis of the mechanism of the low-temperature oxidation of coal
- Authors/Creators
- H. Wang (Author/Creator) - University of Newcastle AustraliaB.Z. Dlugogorski (Author/Creator) - University of Newcastle AustraliaE.M. Kennedy (Author/Creator) - University of Newcastle Australia
- Publication Details
- Combustion and Flame, Vol.134(1-2), pp.107-117
- Publisher
- Elsevier Inc
- Identifiers
- 991005544645507891
- Copyright
- © 2003 The Combustion Institute.
- Murdoch Affiliation
- Murdoch University
- Language
- English
- Resource Type
- Journal article
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- Citation topics
- 7 Engineering & Materials Science
- 7.139 Energy & Fuels
- 7.139.1964 Spontaneous Combustion
- Web Of Science research areas
- Energy & Fuels
- Engineering, Chemical
- Engineering, Mechanical
- Engineering, Multidisciplinary
- Thermodynamics
- ESI research areas
- Engineering