A mixture of benzene and toluene containing 40 mole% of benzene is to be separated continuously in a tray tower at a rate of 200 kmol/h. The top product should have 95 mole% of benzene and the bottom must not contain more than 4 mole% of it. The reflux is a saturated liquid and a reflux ratio of 2.0 is maintained. The feed is a saturated liquid (i.e. it is at its bubble point). i- Obtain and plot the operating lines for the rectifying and the stripping sections on the x- y plane. ii- What is the boil up ratio? i- Calculate the number of the real stages (tray efficiency 40%) and indicate the feed stage. The equilibrium data of the system at 101.3 kPa are given in table QI Table QI 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 0.21 0.38 0,511 0.627 0.719 0.79 0.853 0.91 0.961 1.0

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
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A mixture of benzene and toluene containing 40 mole% of benzene is to be separated
continuously in a tray tower at a rate of 200 kmol/h. The top product should have 95 mole%
of benzene and the bottom must not contain more than 4 mole% of it. The reflux is a
saturated liquid and a reflux ratio of 2.0 is maintained. The feed is a saturated liquid (i.e. it
is at its bubble point).
i- Obtain and plot the operating lines for the rectifying and the stripping sections on the x-
y plane.
ii- What is the boil up ratio?
i- Calculate the number of the real stages (tray efficiency= 40%) and indicate the feed
stage.
The equilibrium data of the system at 101.3 kPa are given in table QI
Table QI
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
y
0.21
0.38
0,511
0.627
0.719
0.79
0.853
0.91
0.961 1.0
Transcribed Image Text:A mixture of benzene and toluene containing 40 mole% of benzene is to be separated continuously in a tray tower at a rate of 200 kmol/h. The top product should have 95 mole% of benzene and the bottom must not contain more than 4 mole% of it. The reflux is a saturated liquid and a reflux ratio of 2.0 is maintained. The feed is a saturated liquid (i.e. it is at its bubble point). i- Obtain and plot the operating lines for the rectifying and the stripping sections on the x- y plane. ii- What is the boil up ratio? i- Calculate the number of the real stages (tray efficiency= 40%) and indicate the feed stage. The equilibrium data of the system at 101.3 kPa are given in table QI Table QI 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 y 0.21 0.38 0,511 0.627 0.719 0.79 0.853 0.91 0.961 1.0
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