How coal properties affect NO{sub x} emissions and loss-on-ignition
- CONSOL Inc., Library, PA (United States)
The CONSOL research combustor, equipped with a low-NO{sub x} burner, was used to assess the impact of coal properties on NO{sub x} emissions and loss-on-ignition (LOI) for coals ranging in rank from lignite to low-volatile bituminous. The coal property variables were volatile matter content, nitrogen content, pulverized coal fineness and coal rank. Volatile matter content was the coal property with the greatest effect on NO{sub x} emissions, followed by coal rank, nitrogen content and coal fineness. High-volatile bituminous coals produced lower NO{sub x} emissions than low-volatile bituminous coals, regardless of the nitrogen content. With some exceptions, lower rank coals produced lower NO{sub x} emissions. For the bituminous coals, the effect of coal fineness on NO{sub x} emissions depended on the volatile matter content; finer coal grinds reduced NO{sub x} emissions for high-volatile coals and increased NO{sub x} emissions for low-volatile coals. Coal rank was the coal property with the greatest effect on LOI; lower rank coals produced lower LOI. LOI correlated strongly with the oxygen content of the coal (a measure of reactivity and rank) and the coal ash content. Finer coal grinds significantly reduced LOI.
- OSTI ID:
- 427869
- Report Number(s):
- CONF-961006--; ISBN 0-7918-1795-4
- Country of Publication:
- United States
- Language:
- English
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