Abstract
Waste coal products have created a vast resource for numerous opportunity fuels. The generation of substantial quantities of waste coal products has led to the development of several opportunity fuels including coal water slurries (CWS) and the direct use of waste coal. These opportunity fuels are specific to locales where coal has been mined and cleaned. CWS fuels have numerous potentially attractive features: They can be environmentally beneficial, both from the coal-preparation perspective and from the combustion perspective; they can be a low cost fuel, particularly if used near the point of production; they integrate readily into existing generating stations; and they have the potential to extend petroleum supplies. The potential of waste coals is now being tapped wherever practical and economically attractive. The development of such opportunity fuels is progressing based upon creativity in the research on fuel formulation and fuel utilization. Of particular significance is the continual improvement in combustion technology—the development of cofiring technologies for CWS firing and the development of circulating fluidized bed (CFB) technology for waste-coal utilization.
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