2. Reaction models for fluidized beds

2.1 Model classification

Chemical reactions in fluidized beds fall into two distinct groups:

• catalytic reactions ;

• reactions with consumable solids.

Reactions with consumable solids are naturally more complicated to model, since they produce not only a change in the composition of the gas phase, but also modifications in the granulometry of the solid (in some cases) or its density (in others).

Generally speaking, the fluidized-bed reactor can be illustrated as shown in figure 3 , where several zones can be distinguished:

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