Catalytic reactors moving beds

FIG. 12-860 Countercurrent gas-solids flow at the top disengaging section of a moving-bed catalytic reactor. 

The catalytic reactor is an example where reaction occurs only at the boundary with a solid phase, but, as long as the solid remains in the reactor and does not change, we did not need to write separate mass balances for the soHd phase because its residence time Tj is infinite. In a moving bed catalytic reactor or in a slurry or fluidized bed catalytic reactor... 

Problems in the Design of the Countercurrent Moving-Bed Catalytic Reactor... 

Activation energy, stability in trickle-bed reactors, 76 Activation overpotential, cross-flow monolith fuel cell reactor, 182 Activity balance, deactivation of non-adiabatic packed-bed reactors, 394 Adiabatic reactors stability, 337-58 trickle-bed, safe operation, 61-81 Adsorption equilibrium, countercurrent moving-bed catalytic reactor, 273 Adsorption isotherms, countercurrent moving-bed catalytic reactor, 278,279f... 

Note that gas-solid moving-bed catalytic reactors, once popular in petroleum cracking, are increasingly being replaced by circulating fluidized beds. They are still used in gas-solid noncatalytic reactors (see Section 11.4.2.6). 

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