Influence of weathering on the combustion behavior of bituminous coals

S. V. Pisupati, A. W. Scaroni, R. D. Stoessner

Research output: Contribution to conferencePaper

2 Scopus citations

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 languageEnglish (US)
Pages87-97
Number of pages11
StatePublished - Jan 1 1990
EventFossil Fuel Combustion Symposium 1990 - Presented at the Thirteenth Annual Energy-Sources Technology Conference and Exhibition - New Orleans, LA, USA
Duration: Jan 14 1990Jan 18 1990

Other

OtherFossil Fuel Combustion Symposium 1990 - Presented at the Thirteenth Annual Energy-Sources Technology Conference and Exhibition
CityNew Orleans, LA, USA
Period1/14/901/18/90

All Science Journal Classification (ASJC) codes

  • Geology
  • Geotechnical Engineering and Engineering Geology

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    Pisupati, S. V., Scaroni, A. W., & Stoessner, R. D. (1990). Influence of weathering on the combustion behavior of bituminous coals. 87-97. Paper presented at Fossil Fuel Combustion Symposium 1990 - Presented at the Thirteenth Annual Energy-Sources Technology Conference and Exhibition, New Orleans, LA, USA, .