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Separation of mixtures of toluene and heptane are difficult due to its low relative volatility. You are to design a distillation column using ASPEN to separate a mixture of toluene and heptane. An equimolar liquid mixture of toluene and heptane enters a continuous rectification column at 100 °C and a rate of 100 kmol/h. The column will operate at a pressure of 1.1 bar. The column is expected to have a recovery in the distillate of the light and heavy key components of 95% and 1%, respectively. For this separation perform the following:
1. Use a DSTWU column in ASPEN to:
a. Identify the light and heavy key components
b. Investigate the effect of reflux ratio on the numbers of theoretical stages.
c. Select the optimum reflux ratio.
d. Determine the number of theoretical stages at this reflux ratio.
e. Estimate the feed stage.
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