A feed rate of about 7.74kmol/h of equimolar mixture of methyl-ethyl ketone (MEK) (1) and n-hexane (2) is fed into a double flash distillation columns. Both columns are maintained at 55 oC albeit at different operating pressure . The first column is at 0.395 atm while the second one is at 0.296 atm. Using Raoult’s Law and the Antoine constants, calculate the following a.The composition and amount of the resulting equilibrium phases at the first flash column b. The composition and amount of the resulting equilibrium phases at the second column c. What percentage of the MEK in the initial feed entering the first flash distiller ends up in the liquid exiting the second flash distiller d. Which assumption that you made in solving this problem would you characterize as least valid and why?
A feed rate of about 7.74kmol/h of equimolar mixture of methyl-ethyl ketone (MEK) (1) and n-hexane (2) is fed into a double flash distillation columns. Both columns are maintained at 55 oC albeit at different operating pressure . The first column is at 0.395 atm while the second one is at 0.296 atm. Using Raoult’s Law and the Antoine constants, calculate the following a.The composition and amount of the resulting equilibrium phases at the first flash column b. The composition and amount of the resulting equilibrium phases at the second column c. What percentage of the MEK in the initial feed entering the first flash distiller ends up in the liquid exiting the second flash distiller d. Which assumption that you made in solving this problem would you characterize as least valid and why?
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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A feed rate of about 7.74kmol/h of equimolar mixture of methyl-ethyl ketone (MEK) (1) and n-hexane (2) is fed into a double flash distillation columns. Both columns are maintained at 55 oC albeit at different operating pressure . The first column is at 0.395 atm while the second one is at 0.296 atm. Using Raoult’s Law and the Antoine constants, calculate the following
a.The composition and amount of the resulting equilibrium phases at the first flash column
b. The composition and amount of the resulting equilibrium phases at the second column
c. What percentage of the MEK in the initial feed entering the first flash distiller ends up in the liquid exiting the second flash distiller
d. Which assumption that you made in solving this problem would you characterize as least valid and why?
Transcribed Image Text:Parameters for Antoine Eqn. Temp. Range AHn
Name
Formula
A B
°C
kJ/mol t/°C
Acetone
29.10
C3H,O
CH4O2 15.0717 3580.80 224.650
CH3N
CH6
C4H10
CẠH10
C,H100 15.3144 3212.43 182.739
C,H100 15.1989 3026.03 186.500
C,H100 14.6047 2740.95 166.670
C4H100 14.8445 2658.29 177.650
14.3145 2756.22 228.060 -26–77
56.2
Acetic acid
24-142
23.70
117.9
Acetonitrile*
14.8950 3413.10 250.523 -27–81
30.19
81.6
30.72
80.0
21.30 -11.9
Benzene
13.7819 2726.81 217.572
6–104
iso-Butane
13.8254 2181.79 248.870 -83–7
n-Butane
13.6608 2154.70 238.789 -73–19
22.44
-0.5
1-Butanol
37–138
43.29 117.6
2-Butanol*
25–120
40.75
99.5
iso-Butanol
30–128
41.82 107.8
tert-Butanol
10–101
39.07
82.3
Carbon tetrachloride CCI4
14.0572 2914.23 232.148 -14–101
29.82
76.6
C6H5C1 13.8635 3174.78 211.700
C4H9C1 13.7965 2723.73 218.265 -17–79
CHCI3
CH12
CSH10
C10H22 13.9748 3442.76 193.858
CH,Cl2 13.9891 2463.93 223.240 -38–60
C,H100 14.0735 2511.29 231.200 -43-55
C4HgO2 15.0967 3579.78 240.337
C20H42
CH,O
C3H10
CH,O2 15.7567 4187.46 178.650
C;H16
CH14
CHẠO
СЭНО2 14.2456 2662.78 219.690 -23—78
Chlorobenzene
29–159
35.19 131.7
1-Chlorobutane
30.39
78.5
Chloroform
13.7324 2548.74 218.552 -23–84
29.24
61.1
29.97
Cyclohexane
Cyclopentane
n-Decane
13.6568 2723.44 220.618
9–105
80.7
13.9727 2653.90 234.510 -35–71
27.30
49.2
65–203
38.75 174.1
Dichloromethane
28.06
39.7
Diethyl ether
1,4-Dioxane
n-Eicosane
26.52
34.4
20–105
34.16
101.3
14.4575 4680.46 132.100 208-379
57.49 343.6
Ethanol
16.8958 3795.17 230.918
3-96
38.56
78.2
Ethylbenzene
Ethylene glycol*
п-Неptane
п-Нехane
13.9726 3259.93 212.300
33–163
35.57 136.2
100–222
50.73 197.3
13.8622 2910.26 216.432
4–123
31.77
98.4
13.8193 2696.04 224.317 -19–92
28.85
68.7
Methanol
16.5785 3638.27 239.500 -11–83
35.21
64.7
56.9
Methyl acetate
Methyl ethyl ketone C4H3O
30.32
14.1334 2838.24 218.690
-8–103
31.30
79.6
CH;NO2 14.7513 3331.70 227.600
C9H20
C3H18
C3H18
C5H12
CHO
C;H3O
C;HgO
Nitromethane*
56–146
33.99 101.2
n-Nonane
13.9854 3311.19 202.694
46–178
36.91
150.8
iso-Octane
99.2
125.6
13.6703 2896.31 220.767
2–125
30.79
n-Octane
13.9346 3123.13 209.635
26–152
34.41
25.79
n-Pentane
13.7667 2451.88 232.014 -45-58
36.0
Phenol
14.4387 3507.80 175.400
80-208
46.18 181.8
97.2
1-Propanol
2-Propanol
16.1154 3483.67 205.807
20–116
41.44
16.6796 3640.20 219.610
8-100
39.85
82.2
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