Repeat Example 2-4, but with (mathrm{F}=3000 mathrm{lbmol} / mathrm{h}), and use a horizontal flash drum with holding
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Repeat Example 2-4, but with \(\mathrm{F}=3000 \mathrm{lbmol} / \mathrm{h}\), and use a horizontal flash drum with holding time \(=55 \mathrm{~min}\) and surge time \(=85 \mathrm{~min}\). Calculate \(\mathrm{D}, \mathrm{h}\), and \(\mathrm{h} / \mathrm{D}\).
Example 2-4
A vertical flash drum is to flash a liquid feed of 1500 lbmol/h that is 40 mol% n-hexane and 60 mol% n-octane at 101.3 kPa (1 atm). We wish to produce a vapor that is 60 mol% n-hexane. Solution of the flash equations with equilibrium data for yH = 0.60 gives xH = 0.19, Tdrum = 378K, and V/F = 0.51. What size flash drum is required?
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