Circulating fluidized bed

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The circulating fluidized bed (CFB) is a type of fluidized bed combustion that utilizes a recirculating loop for even greater efficiency of combustion.^[1] while achieving lower emission of pollutants. Reports suggest that up to 95% of pollutants^[2] can be absorbed before being emitted into the atmosphere. The technology is limited in scale however, due to its extensive use of limestone, and the fact that it produces waste byproducts.