As noted in Section 13.5, the results provided for the toluene hydrodealkylation process are based on the

Question:

As noted in Section 13.5, the results provided for the toluene hydrodealkylation process are based on the SRK model for both enthalpy and phase equilibria. Simulate the benzene column (T-101) with the PR model instead, using the shortcut simulation module and the specifications given in Table 13.2 and the conditions of feed stream (10) given in Example 13.2. Determine the BIPs for the PR model used by the simulator. Rerun the simulation with all the BIPs set to zero. Compare the results.

Equipment Simulator Simulator Input Streams Number Equipment Equip. No. Table 13.2 Required Input Data for a

H-101 R-101 E-102 Heater Stoic react Flash h-1 r-1 f-1 4 93 9 - - 6 9 8 94 Outlet temperature = 600C

V-101 V-103 E-103 Flash Flash Hexch f-1 f-2 e-2 9 94 18 T - - 8 17 10 94 18 No input required because vessel

T-101 Shortcut tower t-1 10 - 19 11 = 90C Recovery of benzene in top product = 0.99 Recovery of toluene in

E-104 E-106 V-102 P-102 Shortcut tower Shortcut tower Shortcut tower Shortcut tower t-1 t-1 t-1 t-1 10 10 10

E-105 C-101 Hexch Compr Mixer Mixer Mixer e-3 C-1 m-2 m-3 m-4 95 97 3 2 6 1 - 5 91 7 15 98 91 92 93 T Outlet

Mixer Mixer Splitter m-5 m-6 S-1 17 99 8 96 100 99 16 97 96 Pressure drop = o bar Pressure drop = o bar

Splitter Splitter S-2 S-3 98 19 - 5 100 7 95 drop = o bar Pressure drop = o bar Pressure drop = o bar

Example 13.2

Even though the ions do not directly participate in the VLE of an electrolyte system, why does their presence affect the VLE of an electrolyte system?

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