Example 10-4 and Problem 10.D17 sized the diameter of a packed column doing the separation in Example 11-1. Suppose a \(15.0-\mathrm{ft}-\) diameter column is to be used. The 1.0 -in. ceramic Intalox saddles have an HETP of \(0.37 \mathrm{~m}\). Pressure is \(101.3 \mathrm{kPa}\).

a. Estimate the packing and tower costs in 2020.

b. What is wrong about this design?

Example 10-4

Problem 10.D17

 

Repeat Example 10-4, except calculate the diameter at the bottom of the column.

Example 10-4

Transcribed Image Text:

A distillation column is separating n-hexane from n-heptane using 1-in. ceramic Intalox saddles. The allowable pressure drop in the column is 0.5 in. of water/ft. Average column pressure is 1.0 atm. Separation in the column is essentially complete, so the distillate is almost pure hexane, and the bottoms is almost pure heptane. The saturated liquid feed is 50.0 mol% n-hexane. L/V = 0.8. If F = 1000.0 lbmol/h and D = 500.0 lbmol/h, estimate the column diameter required at the top.