Question: An ordinary, single-feed distillation column is separating methanol, ethanol, 1-propanol, and n-butanol. There are 27 trays in column, and feed location in column is tray

An ordinary, single-feed distillation column is separating methanol, ethanol, 1-propanol, and n-butanol. There are 27 trays in column, and feed location in column is tray 13 below condenser (input as liquid), reflux ratio is 1.9 , pressure is $4.0 \mathrm{psig}$ (operate column at constant pressure), total condenser with saturated liquid reflux, kettle type reboiler, feed flow rate is $150 \mathrm{kmol} / \mathrm{h}$, feed mole fractions are methanol $=0.360$, ethanol $=0.170,1-$ propanol $=0.320$, and $n$-butanol $=0.150$. Feed pressure is $5.0 \mathrm{psig}$, feed is at $67^{\circ} \mathrm{C}$, distillate flow rate $=127.5$ $\mathrm{kmol} / \mathrm{h}$, adiabatic column, and use the Wilson-2 VLE package. Open a new blank file, simulate this system with RadFrac, and answer the following questions:

1. Report the following values: Condenser temperature K K, reboiler temperature =

1. Report the following values: Condenser temperature K K, reboiler temperature = cal/sec, Qreboiler fractions: fractions: Qcondenser cal/sec Distillate product mole Bottoms product mole 2. Was the specified feed stage the optimum feed stage? Yes No If no, the optimum feed stage is a. Closer to the condenser b. Closer to the reboiler (Do minimum number of simulations to answer these questions. Do not optimize.) 3. Which tray gives the largest column diameter with sieve trays when one uses the originally specified feed stage? Aspen tray # column diameter = meters [Use the default values for number of passes (1), tray spacing (0.6096 m), minimum downcomer area (0.10), foaming factor (1), and overdesign factor (1). Set the fractional approach to flooding at 0.7. Use the Fair design method for flooding.] 4. Which components in the original problem are the LK and HK components? 5. Change one specification in the operating conditions (keep N, original feed location, feed flow rate, feed composition, feed pressure, and feed temperature constant) to make methanol the LK and ethanol the HK. What operating parameter did you change, and what is its new value? Condenser temperature K, reboiler temperature K Distillate product mole fractions: Bottoms product mole fractions:

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