Large central power stations (about 1000 MW electrical) using fluidized bed combustors may be built some day (see Fig. P1.2). These giants would be fed 240 tons of coal/hr (90% C, 10% H,), 50% of which would burn within the battery of primary fluidized beds, the other 50% elsewhere in the system. 

One suggested design would use a battery of 10 fluidized beds, each 20 m long, 4 m wide, and containing solids to a depth of 1 m. Find the rate of reaction within the beds, based on the oxygen used.

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240 ton/hr, 90% C, 10% H₂ Figure P1.2 Fluidized bed 10 mx 4 m x 1m 50% of the feed burns in these 10 units