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In this investigation, coal and biomass are blended together and cofired through a single injector to maximize the potential for fuel interaction. NOx emissions are monitored as a function of exit oxygen concentration in the MFC test section. Representative results are plotted here.
This is a representative example of NOx emissions as a function of overall stoichiometry for a coal-biomass blend with a biomass (wood in this case) with a low nitrogen content. The fuel nitrogen contents in this case were 1.2 and 0.18 lb N/MM Btu for the coal and wood, respectively.
This is a representative example of NOx emissions as a function of overall stoichiometry for a coal-biomass blend with a biomass (old-growth switchgrass in this case) with a moderate nitrogen content. The fuel nitrogen contents in this case were 1.0 and 0.77 lb N/MM Btu for the coal and wood, respectively. |
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