P12-8 The gas-phase reversible reaction as discussed in P11-7 AZB is now carried out under high pressure in a packed-bed reactor with pressure drop. The feed consists of both inerts I and species A with the ratio of inerts to the species A being 2 to 1. The entering molar flow rate of A is 5 mol/min at a temperature of 300 K and a concentration of 2 mol/dm³. Work this problem in terms of volume. Hint: V=W/pe A Pa Additional information: FAO 5.0 mol/min Cao = 2 mol/dm C = 2 Cao To=300 K T₁ = 300 K AHR-20,000 cal/mol Ke 1,000 at 300 K k₁ = 0.1 min at 300 K C = 160 cal/mol/K CR = 18 cal/mol/K Ua CPA = 150 cal/dm³/min/K P = 1.2 kg/dm³ ap, = 0.02 dm³ Coolant mc 50 mol/min =160 cal/mol/K T = 300 K E=10,000 cal/mol V=40 dm³ CeCool = 20 cal/mol/K Plot and then analyze X, X, T, T, and the rate (-) profiles in a PFR for the following cases. In each case, explain why the curves look the way they do. (a) Co-current heat exchange (b) Countercurrent heat exchange (Ans.: When V = 20 dm³ then X = 0.86 and X, = 0.94) (c) Constant heat-exchanger temperature 7, (d) Compare and contrast each of the above results and the results for adiabatic operation (e.g., make a plot or a table of X and X, obtained in each case). (e) Vary some of the parameters, e.g.. (0 <e < 10) and describe what you find. (f) Plot Q, and T, as a function of V necessary to maintain isothermal operation.