Solve Example 26 3 with the following modification the kinetics of the reaction is ash diffusion controlled with (R 100 m ) 1 0 min Example 26 3 A feed consisting 30 of 50 m radius particles 40 of 100 m radius particles 30 of 200 m radius particles is to be reacted in a fluidized bed steady state f...

Given Feed composition 30 of 50m particles 40 of 100m particles and 30 of 200m particles Reactor geo ...

Solve Example 26.3 with the following modification: the kinetics of the reaction is ash diffusion controlled with

Question:

Solve Example 26.3 with the following modification: the kinetics of the reaction is ash diffusion controlled with τ(R = 100 μm=) 1 0 min.

Example 26.3

A feed consisting
30% of 50-μm-radius particles
40% of 100-μm-radius particles
30% of 200-μm-radius particles
is to be reacted in a fluidized-bed steady-state flow reactor constructed from a vertical 2-m long 20-cm ID pipe. The fluidizing gas is the gas-phase reactant, and at the planned operating conditions the time required for complete conversion is 5,10, and 20 min for the three sizes of feed. Find the conversion of solids in the reactor for a feed rate of 1 kg solids/min if the bed contains 10 kg solids.

Additional Information:
The solids are hard and unchanged in size and weight during reaction. A cyclone separator is used to separate and return to the bed any solids that may be entrained by the gas. The change in gas-phase composition in the bed is small.

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