For the ammonia process in Example 6.4, consider operation of the reactor at \(932^{\circ} \mathrm{F}\) and \(400 \mathrm{~atm}\). Use a simulator to show how the product, recycle, and purge flow rates, as well as the mole fractions of argon and methane vary with the purge-to-recycle ratio. How do the power requirements for compression vary, assuming \(3 \mathrm{~atm}\) pressure drop in the reactor and \(1 \mathrm{~atm}\) pressure drop in the heat exchanger?

Data From Example 6.4:-

Figure 6.4:-

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In this example, the ammonia reactor loop in Figure 6.4 is simulated using ASPEN PLUS to examine the effect of the purge-to-recycle ratio on the compositions and flow rates of the purge and recycle streams. For the ASPEN PLUS flowsheet below, the following specifications are made: Simulation Unit Subroutine T(F) P (atm) RI REQUIL 932 200 Fl FLASH2 -28 136.3 and the Chao-Seader option set is selected to estimate the thermo- physical properties. Note that REQUIL calculates chemical equilibria at the temperature and pressure specified, as shown on the multimedia module ASPEN Chemical Reactors Equilibrium Reactors REQUIL, which can be downloaded from www.seas.upenn.edu/ ~dlewin/multimedia.html. The combined feed stream, at 77F and 200 atm, is composed of lbmol/hr Mole Fraction N 24 0.240 H 74.3 0.743 Ar 0.6 0.006 CH 1.1 0.011 100.0 1.000