It is proposed to use the elementary reactionsto characterize mixing in a real reactor by...

It is proposed to use the elementary reactions

to characterize mixing in a real reactor by monitoring the product distribution at different temperatures. The ratio of specific reaction rates (k2/k,) at temperatures Tt, T2,T3, and 7., is 5.0, 2.0, 0.5, and 0.1, respectively. The corresponding values of τk1CA0 are 0.2, 2, 20, and 200.

(a) Calculate the product distribution for the CSTR and PFR in series described in Example 13–3 for τCSXR = τPFR = 0.5τ.

(b) Compare the product distribution at two temperatures using the RTD shown in Examples 13–1 and 13–2 for the complete segregation model and the maximum mixedness model.

(c) Explain how you could use the product distribution as a function of temperature (and perhaps flow rate) to characterize your reactor. For example, could you use the test reactions to determine whether the early mixing scheme or the late mixing scheme in Example 13–3 is more representative of a real reactor? Recall that both schemes have the same RTD.

(d) How should the reactions be carried out (i.e., at high or low temperatures) for the product distribution to best characterize the micromixing in the reactor?