2. Material transfer control

2.1 Transfer characteristics in reactors

A number of heterogeneous reactions require contact and transfer between phases, many of which also involve heterogeneous catalytic reactions with a solid catalyst. Each transfer step constitutes an additional step to the reaction step, and can be characterized by a transfer resistance.

A simple way of representing the process is to consider the transfer and reaction stages as two steps in series. Each of the co-reactants is initially separated, one placed in the reactor beforehand, the other in a separate container, the contents of which are poured into the reactor at constant speed.

The reaction medium is assumed to be perfectly mixed, so the reaction proceeds at the speed of intrinsic chemical...