Determine the following: a) Composition and amounts of the distillate and bottoms streams for a feed stream of 1000 mole/hr. b) Top and bottom temperatures and the number of stages at total reflux. c) The distribution of components at the conditions determined in part (b). d) The minimum reflux ratio, and number of stages when R-8.0. e) The feed tray location.
Determine the following: a) Composition and amounts of the distillate and bottoms streams for a feed stream of 1000 mole/hr. b) Top and bottom temperatures and the number of stages at total reflux. c) The distribution of components at the conditions determined in part (b). d) The minimum reflux ratio, and number of stages when R-8.0. e) The feed tray location.
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:LK MeOH
HK EtOH
n-POH
n-BOH
Z₁
0.20
0.25
0.2
0.35
f;
200
250
200
350
1000.0
Use operating R 8.00
R/(R+1)
0.8889
Rmin/(Rmin+1)
0.8350
Rmin/(Rmin+1) 0.8297
Kirkbride (Feed stage)
Relative Volatilities
Curve-fit
a
0.490
0.218
Antoine
a
0.494
0.226
Nr/Ns
Nr
Ns
d₁
241.0
21.0
0.053
1.2E-04
262.0
d₁
241.0
21.0
0.074
2.9E-04
262.0
b;
-41.0
229.0
199.947
350.0
738.0
1.11469506
6.853
6.147
b₁
-41.0
229.0
199.926
350.0
738.0
Nmin
Curve-fit 8.201
Antoine
7.818
7
7
14
Yi
0.92
0.08
2.0E-04
4.6E-07
Yi
0.92
0.08
2.8E-04
1.1E-06
q
N
X;
-0.06
0.31
0.27
0.47
X;
-0.06
0.31
0.27
0.47
1.1
Theta
1.256
Sum
1.078
-0.977
-0.128
-0.074
0.000
Theta
1.2695
Sum
1.031
-0.928
-0.128
-0.076
0.000
X
Y (Molokanov) Y (Eduljee)
0.3268 0.3615 0.3521
0.3468 0.3380
0.3475
Rmin
5.059
stages above the feed
stages below the feed
4.272
-0.312
0.000
0.000
4.059
N (Molokanov N (Eduljee)
13.41
13.20
12.50
12.32
13
Rmin
4.873
4.070
-0.297
0.000
0.000
3.873
Transcribed Image Text:Vaporization of Multicomponent Mixtures
T (°C)
50
60
65
70
75
80
85
90
100
Methanol (MeOH)
415
629
767
929
1119
1339
1593
1884
2598
Vapor Pressure (mm Hg)
Ethanol (EtOH)
220.0
351.5
438
542
665
812
984
1185
1706
n-Propanol (nPOH)
88.9
148.9
190.1
240.6
301.9
376
465
571
843
n-Butanol (nBOH)
33.7
59.2
77.7
99.6
131.3
165.0
206.1
225.9
387.6
3) Multicomponent Alcohol Distillation
An alcohol feed mixture at 101.325kPa (760 mmHg) consisting of 30 % methanol, 20% ethanol, 15% n-
propyl alcohol and 35% n-butyl alcohol is distilled so that 92% of the methanol along with a residue of 8%
ethanol and other trace components is recovered in the distillate. The feed is below the boiling point, so that
q=1.10. The planned operating reflux ratio is 8.0. Assume Raoult's Law applies.
The vapor-pressure at 101.325 kPa (760 mm Hg) is available for several alcohols (in a posted MS-EXCEL
workbook)
Determine the following:
a) Composition and amounts of the distillate and bottoms streams for a feed stream of 1000 mole/hr.
b) Top and bottom temperatures and the number of stages at total reflux.
c) The distribution of components at the conditions determined in part (b).
d) The minimum reflux ratio, and number of stages when R=8.0.
e) The feed tray location.
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