Calculate with the Peng-Robinson equations for thermodynamic properties, the product compositions, stage temperatures, interstage flow rates and compositions, reboiler duty, and condenser duty for the distillation specifications in Figure 10.33, which represent an attempt to obtain four nearly pure products from a single distillation operation. Reflux is a saturated liquid. Why is such a high reflux ratiorequired?

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20 psia 14.08 Ibmol/h LID = 20 10 Feed 150°F, 25 psia 19.53 Ibmol/h 14 Ibmol/h 24 24.78 Ibmol/h 14.08 19.53 28 24.78 25 psia 39.94 కొళ్లొల్లి