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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?

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
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? 

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
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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