The rate of temperature rise of a subbituminous coal during spontaneous combustion in an adiabatic device: The effect of moisture content and drying methods
✍ Scribed by W.E. Vance; X.D. Chen; S.C. Scott
- Publisher
- Elsevier Science
- Year
- 1996
- Tongue
- English
- Weight
- 576 KB
- Volume
- 106
- Category
- Article
- ISSN
- 0010-2180
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✦ Synopsis
This work investigates the effect of the moisture content of coal on its spontaneous ignition in oxygen (40°C-140°C). It has been found that the highest heating rate is achieved at a medium moisture content of ~ 7 wt% for an initial inherent moisture content of the coal before drying (in dry nitrogen at 65°C) of -20 wt%. This is particularly noticeable at temperatures below 80°C and tends to support previous studies showing that a maximum oxidation rate occurs at such a moisture content in the same temperature range. Two drying methods have been adopted in the current work and the effects of their operating conditions on the heating rates are described.