Examples 9.4 through 9.7 illustrate the approach to problems dealing with non isothermal reactors. This approach to multistage operations of solid catalyzed reactions.

To reinforce these concepts, Problems 9.1 through 9.9 ask the reader to redo these examples with one or more changes. In many of these problems there is no need to redo the whole problem, just indicate where changes are needed in text and graphs.

Example 9.4

Using the optimal temperature progression in a plug flow reactor for the reaction

We plan to run the reaction of Example 9.4 (C_A0 = 4 mollliter, F_A0 = 1000 mol/min) in a plug flow reactor kept at 40°C throughout to 90% conversion. Find the volume of reactor needed.

XA 1.0 0.8 0.6 0.4 0.2 1 Optimum progression 20 -TA = 0.4 E 0.485 Feed, 25C Equilibrium 0.34- 0.27 40 60 Temperature, C 0 80 C A B (-rA) 1100 I Tmax = 95C 2.5 2.0 1.5 1.0 0.5 0 Path ABCDE from Fig. E4a or E3 Total area = 0.8 0.2 0 10% of area reaches this point dXA -TA 0.4 XA = 0.405 0.6 0.8