In the Caprolactam production process, distillation is used for the separation of cyclohexane and cyclohexanol. The feed to the column is 400 ktons per year (1yr = 8000hr) and it contains z=58 mol% cyclohexane. The specifications for the top and bottom product are respectively xp-98 mol% and XB-2 mol% cyclohexane. The column is operated at atmospheric pressure. The vapor-to-feed ratio in the feed is 10 mol %. The xy-diagram for the system can be found on the next slide.
In the Caprolactam production process, distillation is used for the separation of cyclohexane and cyclohexanol. The feed to the column is 400 ktons per year (1yr = 8000hr) and it contains z=58 mol% cyclohexane. The specifications for the top and bottom product are respectively xp-98 mol% and XB-2 mol% cyclohexane. The column is operated at atmospheric pressure. The vapor-to-feed ratio in the feed is 10 mol %. The xy-diagram for the system can be found on the next slide.
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
could someone show clearer steps and working on how to reach answers provided especially with use of graph.
d) Graphically determine the minimum reflux ratio
Transcribed Image Text:18
19
Tutorial 3 - Question Q3 Solution
d) Graphically determine the minimum reflux ratio and compare to the shortcut model
prediction.
1
0.9
0.8
0.7
0.6
y 0.5
0.4
0.3
0.2
0.1
0
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
X
0.9
0.8
0.7
0.6
y 0.5
0.4
0.3
0.2
0.1
Pinch point
0
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
X
The vapour-to-feed ratio is given:
VE
F
= 0.1
The quality of the feed:
VE
LE F-V²=1-/=0
q= =
F
The q-line:
y = -
Tutorial 3 - Question Q3 Solution
d) Graphically determine the minimum reflux ratio and compare to the shortcut model
prediction.
1
9
q
·x +
y = -9x + 5.8
1
1-q
University of
Strathclyde
Engineering
Points (0.58,0.58) and (0.54,0.94)
are on the q-line
Operating line:
R
y =
R + 1
Z
The pinch point is: (0.56,0.75)
Therefore, two points on the
operating line are:
(xD, XD) and (0.56,0.75)
x +
In these conditions:
Rmin
Rmin +1
Rmin = 1.22
So, the slope of the operating line is:
XD - 0.75
XD - 0.56
= 0.55
University of
Strathclyde
Engineering
= 0.55
0.9
1
R + 1
-XD
Transcribed Image Text:In the Caprolactam production process, distillation is used for
the separation of cyclohexane and cyclohexanol. The feed to
the column is 400 ktons per year (1yr = 8000hr) and it contains
z=58 mol% cyclohexane. The specifications for the top and
bottom product are respectively xD=98 mol% and X²=2 mol%
cyclohexane. The column is operated at atmospheric pressure.
The vapor-to-feed ratio in the feed is 10 mol%. The xy-diagram
for the system can be found on the next slide.
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
Step by step
Solved in 4 steps with 19 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