constants are the same for all components when the relative volatilities do not change with the temperature.
Table 2.2 provides design parameters and steady-state conditions for the base case. Figure 2.1 demonstrates the reactive column and the terminology. The two pure fresh feed flowrates are 12.6mol/s for both A and B. The operating pressure is 8 bar, and the conversion is 95%. There are 19 total trays: 9 reactive, 5 stripping, and 5 rectifying. The fresh feed of A (F0A) is fed onto the first reactive tray immediately above the stripping section. The fresh feed of B (F0B) is fed on the top reactive tray immediately below the rectifying section.
The holdup on the reactive trays is 1000 mol. The vapor boilup required to achieve the desired 95 mol% purities of the two products at base case conditions is 28.91 mol/s, and the corresponding reflux flowrate is 33.55 mol/s. These purities correspond to a 95% conversion.
The vapor leaving the top of the column is larger than the vapor boilup, despite the fact that equimolal overflow has been assumed. This is due to the exothermic heat of reaction generating more vapor on the reactive trays.
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