Coal combustion particle mass distribution

Figure 2. Curve a - cumulative mass distribution for coal combustion particles collected on an afterfilter of a coated impactor. Curve b - cumulative mass distribution for particles collected on an afterfilter of an uncoated impactor. Curve c -cumulative mass distribution for particles collected on an afterfilter at the outlet of a wet scrubber. Reproduced with permission from Ref. 15. Copyright 1978, Pergamon Press Ltd.

In practice, the gases exiting the fluidized bed reactor contain a certain amount of ash and have to be cleaned. Also, the combustion products of coal are sometimes corrosive, which means that in addition to air being fed into the reactor, various other chemicals are added to ensure "clean" combustion products that will not corrode turbine blades or violate environmental standards. Coal combustion is a very active field of research, and many exciting developments are occurring there. In this analysis, we make certain assumptions that illustrate the thermodynamic concepts as clearly as possible. Therefore, we do not examine the effect of hydrodynamics, heat, and mass transfer, which are very important in the combustion of the coal particle and the distribution of combustion products. We do not expect that this will have a significant impact on the analysis. 

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