Investigate a two-reactor system to replace the single adiabatic PFR in the base case. The tworeactor system consists of an adiabatic CSTR followed by an adiabatic PFR. For the base-case toluene conversion (0.75),

Problems 23. 12-23.16 investigate the performance of the reactor section for a noncatalytic process for the hydrodealkylation of toluene to produce benzene. Reactor R-101 in Figure 23. 4

(b) operated at the flow conditions shown represents a base case (inlet pressure is \(25 \mathrm{bar}\) ). Kinetics are given in Table 23. 1. Ignore reactor pressure drop. Reactor volume for the base case is \(4.76 \mathrm{~m}^{3}\).

a. Determine the size of the CSTR and PFR that provides the minimum total reactor volume.

b. Determine the fraction of the total conversion obtained in the CSTR from Part (a).

Figure 23.4 (b)

Table 23.1

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600 40.8 Bb Catalytic System R-101 652.5 Noncatalytic System H-102* R-101 600 Flowrates (kmol/h) Stream 6b, b 9, d Hydrogen 760.6 652.6 Methane 334.3 442.3 Benzene Toluene 8.0 144.0 116.0 36.0 Temperature (C) 652.5 E-107* 750 40.8 813 B * New Units