a. Find the minimum external reflux ratio. b. Useextrnal refulx raio = 2.0 x minimum external reflux ratio, and find the number of real stages and real optimum feed location if the Murphree vapor efficiency is EMy = for all stages.
a. Find the minimum external reflux ratio. b. Useextrnal refulx raio = 2.0 x minimum external reflux ratio, and find the number of real stages and real optimum feed location if the Murphree vapor efficiency is EMy = for all stages.
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Transcribed Image Text:A distillation column is separating 1000 kmol/h mixture containing 32 mol% ethanol
and the balance is water. The feed enters the column as a subcooled liquid that will
condense 1 mole of vapor on the feed tray for every 4 moles of feed. The column has a
partial condenser and uses open steam heating. We desire a distillate product yp =
0.75 and a bottoms product xg = 0. 10. Assume the steam used is a
pure saturated vapor. Equilibrium data are in the following Table:
Temp ( C) x (ETOH) y (ETOH)
100
95.5
1.9
17
89
7.21
38.9
86.7
9.66
43.75
85.3
12.38
47.04
84.1
16.61
50.89
82.7
23.37
54.45
82.3
26.08
55.8
81.5
32.73
58.26
80.7
39.65
61.22
79.8
50.79
65.64
79.7
51.98
65.99
79.3
57.32
68.41
78.7
67.63
73.85
78.4
74.72
78.15
78.1
89.43
89.43
78.3
100
100
a. Find the minimum external reflux ratio.
b. Useextrnal refulx raio = 2.0 x minimum external reflux ratio, and
find the number of real stages and real optimum feed location if the Murphree
vapor efficiency is EMy = for all stages.
c. Find the steam flow rate used.
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