The gas-phase reversible reaction as discussed in Problem P11-7B A B is now carried out under

Question:

The gas-phase reversible reaction as discussed in Problem P11-7B A ⇄ B 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.

Additional information:
FA0-5.0 mol/minT0-300KAHRx=-20000 cal/molapb=0.02 dm-3CA0-2 mol/dm3T1=300KKC-1000 at 300 (a) Co-current heat exchange
(b) Countercurrent heat exchange.
(c) Constant heat-exchanger temperature T_a
(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_e obtained in each case).
(e) Vary some of the parameters, for example, (0 (f) Plot Q_r and T_aas a function of V necessary to maintain isothermal operation.

Data from Problem P11-7B

The gas-phase reversible reaction A ⇄ B is 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.

Additional information:

1. Adiabatic Operation. Plot X, X_e, p, T, and the rate of disappearance as a function of V up to V = 40 dm³. Explain why the curves look the way they do.
2. Vary the ratio of inerts to A (0≤ΘI≤10) and the entering temperature, and describe what you find.
3. Plot the heat that must be removed along the reactor (Q˙ vs. V) to maintain isothermal operation. Part (c) is “C” level of difficulty. We will continue this problem in Chapter 12.