Gas-Phase, Pressurized CSTR

Suppose a mixture of gases is fed into the reactor sketched in Fig. 3.2. The reactor is filled with reacting gases which are perfectly mixed. A leversihle reaction occurs  

The forward reaction is 1.5th-order in A the reverse reaction is first-order in B. Note that the stoichiometric coefficient for A and the order of the reaction are not the same. The mole fraction of reactant A in the reactor is y. The pressure 

We will assume cr.tVigrjpQi cyof..tYi so the temperature T is constant., Perfect gases are The feed strearp mwl a I nrrtE- 

The flow out of the reactor passes through a restriction (control valve) inW another vessel which is held at a constant pressure Pp (absolute). The outflow will vary with the pressure and the composition of the reactor. Flows through control valves are discussed in more detail in Part III here let us use the formula 

C is the valve-sizing coefficient. Density varies with pressure and composition. 

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