Problem

(1) What would have been the selectivity SB/XY and conversion, X, if the reaction had been...

(1) What would have been the selectivity SB/XY and conversion, X, if the reaction had been carried out in a single PFR with the same volume as the CSTR? (2) How would your answers change if the pressure were increased by a factor of 100?

(b) Example 6-3. Make a table/list for each reactor shown in Figure 6-3 identifying all the types of reactions that would be best carried out in this reactor. For example, Figure 6-3(d) Semibatch: used for (1) highly exothermic reactions and (2) selectivity, for example, to maintain concentration A high and B low and (3) to control conversion of A or B.

(c) Example 6-4. (1) How would τ’opt = Change it k1 = k2 = 0.25m3/s/kg at 300 K? (2) How would τ’opt, change for a CSTR? (3) What CSTR (with τ’ = 0.5 kg/m3/s) operating temperature would you recommend to maximize B for CA0 = 5 mol/dm3, k1 = 0.4 m3/kg s, k2 and k2 = 0.01 m3/kg . s with E1, = 10 kcal/mol and E2 = 20 kcal/mol (plot CB versus T).

(d) Example 6-5. How would your answers change if Reaction 2 were reversible and followed an elementary rate law?

(e) Example 6-6. How would Equations (E6-6.3) and (E6-6.8) change if the reactions were carried out in the liquid phase under high pressure?

(f) Example 6-7. Load the Living Example Problem from the CD-ROM. (1) How would your answers change if the feed were equimolar in hydrogen and mesitylene? (2) What is the effect of ΘH on τopt? On Sx/r?

(g) Example 6-8. Same question as P6-2(f)?

(h) Example 6-9. Load the Living Ex/ample Problem from the CD-ROM. (1) How would your answers change if FB0 = 2FA0? (2) If reaction (1) were A+2B -> D with the rate law remaining the same?

(i) Example 6-10. Load the Living Example Problem from the CD-ROM. (1) How would your answers change if the reactor volume was cut in half and k3B and k4C were decreased by a factor of 4? (2) What reactor schemes and conditions would you choose to maximize Sc/r? Hint: Plot SC/F versus ΘB as a start. Describe how pressure drop would affect the selectivity.

(j) Read Solved Problem A, Blood Coagulation. Load the living example (1) Plot out some of the other concentrations, such as TF-VIIa and TF-VIIaX (2) Why do the curves look the way they do? What reaction in the cascade is most likely to be inhibited causing one to bleed o death? (3) What reactions if eliminated could cause one to die of a blood clot (Hint. Look at ATIIII and/or TFPI.)

(k) Read Solved Problem B, Membrane Reactor. Load the Membrane Reactor for from the CD-ROM. How would your answers change if the feed were the same as in Examples 6-7 and 6-8 (i.e., FH0= FM0)? Vary yM0, and the reactor volume and describe what you find.

(l) Living Example Web Module: Oscillating Reactions. Load the Living Example Polymath Program for oscillating reactions on the CD-ROM For the (IO-) and (I) reactions set k1, = 0.0001/min-1 and for reaction (1) Cp0 = 0 01 mol/dm3. (1) What did you find? Look at the linearized stability on the CD-ROM. (2) What factors affect the frequency and onset of the oscillations? (3) Explore and write a paragraph describing what you find. (4) Load the Living Example Polymath Program for the BZ reaction. Vary the parameters and write a paragraph descibing what you find. (5) See Problem P6-22C

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Solutions For Problems in Chapter 6