The following feed of 100 mol/h at the boiling point and 405.3 kPa pressure is fed to a fractionating tower: n-butane (xC4 = 0.40), n-pentane (xC5 = 0.25), n-hexane (xC6 = 0.20), and n-heptane (xC7 = 0.15). This feed is distilled so that 95% of the n-pentane is recovered in the distillate and 95% of the n-hexane in the bottoms. Calculate the following: a. Moles per hour and composition of distillate and bottoms. b. Top and bottom temperature of tower. c. Minimum stages for total reflux and distribution of other components (trace components) in the distillate and bottoms, that is, moles and mole fractions. [Also correct the compositions and moles in part (a) for the traces.] d. Minimum reflux ratio using the Underwood method. e. Number of theoretical stages at an operating reflux ratio of 1.3 times the minimum. f. Location of the feed tray.
The following feed of 100 mol/h at the boiling point and 405.3 kPa pressure is fed to a fractionating tower: n-butane (xC4 = 0.40), n-pentane (xC5 = 0.25), n-hexane (xC6 = 0.20), and n-heptane (xC7 = 0.15). This feed is distilled so that 95% of the n-pentane is recovered in the distillate and 95% of the n-hexane in the bottoms. Calculate the following: a. Moles per hour and composition of distillate and bottoms. b. Top and bottom temperature of tower. c. Minimum stages for total reflux and distribution of other components (trace components) in the distillate and bottoms, that is, moles and mole fractions. [Also correct the compositions and moles in part (a) for the traces.] d. Minimum reflux ratio using the Underwood method. e. Number of theoretical stages at an operating reflux ratio of 1.3 times the minimum. f. Location of the feed tray.
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
Related questions
Question
100%
The following feed of 100 mol/h at the boiling point and 405.3 kPa pressure is
fed to a fractionating tower: n-butane (xC4 = 0.40), n-pentane (xC5 = 0.25), n-hexane (xC6 =
0.20), and n-heptane (xC7 = 0.15). This feed is distilled so that 95% of the n-pentane is
recovered in the distillate and 95% of the n-hexane in the bottoms. Calculate the
following:
a. Moles per hour and composition of distillate and bottoms.
b. Top and bottom temperature of tower.
c. Minimum stages for total reflux and distribution of other components (trace
components) in the distillate and bottoms, that is, moles and mole fractions. [Also
correct the compositions and moles in part (a) for the traces.]
d. Minimum reflux ratio using the Underwood method.
e. Number of theoretical stages at an operating reflux ratio of 1.3 times the
minimum.
f. Location of the feed tray.
fed to a fractionating tower: n-butane (xC4 = 0.40), n-pentane (xC5 = 0.25), n-hexane (xC6 =
0.20), and n-heptane (xC7 = 0.15). This feed is distilled so that 95% of the n-pentane is
recovered in the distillate and 95% of the n-hexane in the bottoms. Calculate the
following:
a. Moles per hour and composition of distillate and bottoms.
b. Top and bottom temperature of tower.
c. Minimum stages for total reflux and distribution of other components (trace
components) in the distillate and bottoms, that is, moles and mole fractions. [Also
correct the compositions and moles in part (a) for the traces.]
d. Minimum reflux ratio using the Underwood method.
e. Number of theoretical stages at an operating reflux ratio of 1.3 times the
minimum.
f. Location of the feed tray.
Transcribed Image Text:TºC
50
55
60
65
70
75
80
85
90
95
100
105
110
115
120
125
130
135
140
145
150
K-Values (405.3 kPa)
C6
0.151
0.178
0.209
0.243
0.282
0.326
0.375
0.428
0.486
0.550
0.618
0.692
0.772
0.858
0.950
1.048
1.152
1.263
1.379
1.502
1.631
C4
1.222
1.367
1.521
1.685
1.860
2.051
2.251
2.460
2.679
2.907
3.145
3.393
3.643
3.899
4.160
4.425
4.694
4.963
5.233
5.500
5.763
C5
0.457
0.523
0.596
0.677
0.763
0.855
0.955
1.064
1.183
1.310
1.447
1.593
1.741
1.897
2.060
2.229
2.404
2.585
2.771
2.962
3.156
С7
0.061
0.073
0.088
0.104
0.123
0.145
0.169
0.196
0.227
0.261
0.299
0.341
0.387
0.437
0.492
0.552
0.616
0.686
0.761
0.842
0.928
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
This is a popular solution!
Trending now
This is a popular solution!
Step by step
Solved in 8 steps with 7 images
Recommended textbooks for you
Introduction to Chemical Engineering Thermodynami…
Chemical Engineering
ISBN:
9781259696527
Author:
J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:
McGraw-Hill Education
Elementary Principles of Chemical Processes, Bind…
Chemical Engineering
ISBN:
9781118431221
Author:
Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard
Publisher:
WILEY
Elements of Chemical Reaction Engineering (5th Ed…
Chemical Engineering
ISBN:
9780133887518
Author:
H. Scott Fogler
Publisher:
Prentice Hall
Introduction to Chemical Engineering Thermodynami…
Chemical Engineering
ISBN:
9781259696527
Author:
J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:
McGraw-Hill Education
Elementary Principles of Chemical Processes, Bind…
Chemical Engineering
ISBN:
9781118431221
Author:
Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard
Publisher:
WILEY
Elements of Chemical Reaction Engineering (5th Ed…
Chemical Engineering
ISBN:
9780133887518
Author:
H. Scott Fogler
Publisher:
Prentice Hall
Industrial Plastics: Theory and Applications
Chemical Engineering
ISBN:
9781285061238
Author:
Lokensgard, Erik
Publisher:
Delmar Cengage Learning
Unit Operations of Chemical Engineering
Chemical Engineering
ISBN:
9780072848236
Author:
Warren McCabe, Julian C. Smith, Peter Harriott
Publisher:
McGraw-Hill Companies, The