Abstract
The relative combustion performance of five outcrop bituminous coals (naturally weathered) and five deep-mined (unoxidized) coals is reported. Chemical and structural differences between the weathered and fresh coals and the extent of oxidation were determined. The criteria used for evaluation were ignition temperature, burning profile, char reactivity and combustion efficiency (carbon burnout). The ignition temperatures of the crop coals were equal to or less than those of the corresponding fresh coals in all cases. The devolatilization of the crop coals began at a lower temperature and extended over a wider temperature range than the fresh coals. The combustion efficiency and the reactivity of the chars produced from the crop coals, were higher than those of the corresponding fresh coals. Burning profiles of the crop coals showed a greater weight loss at a lower temperature and the residence time and excess air required for complete combustion were lower than those required for the fresh coals under similar conditions.
| Original language | English (US) |
|---|---|
| Pages | 87-97 |
| Number of pages | 11 |
| State | Published - Jan 1 1990 |
| Event | Fossil Fuel Combustion Symposium 1990 - Presented at the Thirteenth Annual Energy-Sources Technology Conference and Exhibition - New Orleans, LA, USA Duration: Jan 14 1990 → Jan 18 1990 |
Other
| Other | Fossil Fuel Combustion Symposium 1990 - Presented at the Thirteenth Annual Energy-Sources Technology Conference and Exhibition |
|---|---|
| City | New Orleans, LA, USA |
| Period | 1/14/90 → 1/18/90 |
All Science Journal Classification (ASJC) codes
- Geology
- Geotechnical Engineering and Engineering Geology