The following liquid-phase reactions were carried out in a CSTR at 325 K:

Sketch the trends or results you expect before working out the details of the problem. The concentrations measured inside the reactor were C_A = 0.10, C_B = 0.93, C_C = 0.51, and C_D = 0.049 all in mol/dm³.

a. What are the values of r_1A, r_2A, and r_3A? (r_1A = –0.7 mol/dm₃ · min)
b. What are the values of r_1B, r_2B, and r_3B?
c. What are the values of r_1C, r_2C, and r_3C? (r_1C = 0.23 mol/dm³ · min)
d. What are the values of r_1D, r_2D, and r_3D?
e. What are the values of r_1E, r_2E, and r_3E?
f. What are the values of the net rates of formation of A, B, C, D, and E?
g. The entering volumetric flow rate is 100 dm3/min and the entering concentration of A is 3 M. What is the CSTR reactor volume?
h. What are the exit molar flow rates from the 400 dm³ CSTR?

i. PFR. Now assume the reactions take place in the gas phase. Use the preceding data to plot the molar flow rate’s selectivity and p as a function of PFR volume up to 400 dm³. The pressure-drop parameter is 0.001 dm^–3, the total concentration entering the reactor is 0.2 mol/dm³, and υ₀ = 100 dm3/min. What are the values S˜D/E of and S˜C/D?
j. Membrane Reactor. Repeat (i) when species C diffuses out of a membrane reactor and the transport coefficient, k_C, is 10 min^–1. Compare your results with part (i).

Transcribed Image Text:

3A B + C-r1A=k1ACAK1A=7.0xmim-12C + A-3Dr2D-k2DCC2CAK2D-3.0xdm6mol2 mol4D + 3C-3Er3E=k3EXCDXCCk3E-2.0 dm3mol min