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:F
1000
LK MeOH
HK
EtOH
n-POH
n-BOH
Tdew
86.1
Top, Distillate Temp (Curve fit)
Yi
0.92
0.08
0.00
0.00
MeOH
EtOH
n-POH
n-BOH
Me OH
EtOH
n-POH
n-BOH
Top, Distillate Temp (Antoine)
Tdew
Yi
85.8
0.92
0.08
0.00
0.00
Bottoms Temp (Curve fit)
Tbubble
113.3
Me OH
EtOH
n-POH
n-BOH
D
Bottoms Temp (Antoine)
Tbubble
112.3 Me OH
Z
0.30
0.20
0.15
0.35
EtOH
n-POH
n-BOH
X₁
0.08
0.24
0.20
0.47
X₁
0.08
0.24
0.20
0.47
Light-Key Volatilities
ap
Curve-fit 1.601
Antoine 1.640
Nm
Curve-fit 8.201
Antoine 7.818
261.9
Yi
0.92
0.08
0.00
0.00
Pvap
1672.8
1045.0
497.6
215.9
Pvap
3668.2
2469.4
1247.7
569.0
Pvap
3868.1
2557.6
1303.7
624.6
B
Pvap
a
1666.7 1.640
1016.1
1.000
487.1
0,479
212.4
0.209
αB
1.485
1.512
X₁
0.08
0.24
0.20
0.47
a
1.601
1.000
0.476
0.207
a
1.485
1.000
0.505
0.230
a
1.512
1.000
0.510
0.244
a
1.542
1.575
738.1
f
300
200
150
350
1000.0
y₁ / a
0.5747
0.0800
0.0000
0.0000
0.6547
0.6547
8.16E-08
yi / a
0.5609
0.0800
0.0000
0.0000
0.6409
0.6409
8.19E-07
a xi
0.1188
0.2426
0.1027
0.1093
0.5734
0.6091
3.58E-02
a xi
0.1210
0.2426
0.1036
0.1158
0.5830
0.5830
1.86E-07
d₁
241.0
21.0
0.0
0.0
261.9
X;
0.418
0.058
0.000
0.000
0.476
X;
0.420
0.060
0.000
0.000
0.479
Yi
0.386
0.788
0.334
0.355
1.863
b₁
59.0
179.0
150
350
738.1
Pvap/y
0.42
0.06
0.00
0.00
0.5
Pvap/y
0.42
0.06
0.00
0.00
0.5
x*Pvap
293.45
599.04
253.56
269.81
1415.9
Yi
x*Pvap
0.407
309.45
0.816
620.42
0.349
264.94
0.390 296.17
1.962
1491.0
X₁
0.418
0.058
0.000
0.000
0.5
X₁
0.420
0.060
0.000
0.000
0.5
Yi
0.386
0.788
0.334
0.355
1.863
Y₁
0.407
0.816
0.349
0.390
1.962
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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