The design of a single reactor

The main design of a reactor rests on the steady state equations to be solved under the conditions of a given feed or a required product. After the values of the principal variables have been laid down the design must be checked for its dynamic properties. Our concern in this and the next section is with the steady state design. We shall first deal with the solution of the equations, and in the following section with some associated problems. 

Let us consider first the case of a single reaction and recall that we have two equations, 

Normally, the feed composition will be given (the stoichiometric constants o p the thermostatic data 7, and the parameters of the kinetic expression are, of course, known), and as these two equations contain five variables, namely 7/, 7, and three variables must be chosen while the remaining 

The heat removal rate Q is a function of other design variables, of the temperature 7, and of the chosen form of cooling. Three important possibilities for the design of the temperature control may be mentioned. First, there is the jacketed pot of Fig. 7,3(a). If the flow rate of the coolant is sufficiently high for the jacket to be at a uniform temperature 7, h is the overall heat transfer coefficient, and A is the area of the cooled wall, then 

But the jacket itself can be considered as a stirred tank having been fed by a coolant stream of flow rate q,, heat capacity and temperature Since the heat 0 serves to heat up the coolant from 7 to 7., we have 

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