The efficiency of a fractional distillation is given as the number of cycles or theoretical plates. Traversing through steps A --> D in Figure 1H-1 (from the distillation handout) is equivalent to having completed two vaporization- condensation cycles or two theoretical plates. Predict the temperature of the initial distillate for the solution used in Figure 1H-1 for a fractional distillation that is rated at four theoretical plates. 120 120 Flgure 1H-1 Temperature- composition diagram for the toluene- cyclohexane system 110 110 Vapor 100 100 B 90 D 90 Liquid 80 80 70 70 60 60 0.25 1.0 toluene mol fraction 0.0 cyclohexane 0.5 0.75 0.0 toluene 1.0 cyclohexane Please give a detailed answer as I am trying to learn and just not sure where to begin with this problem. I was also given this table, but I am not sure if it is applicable to this specific problem. Table 1H-1 Properties of Fractionating Columns Used for Miniscale Distillation Distillation Column packing Boiling point difference required cycles Hold-up Metal sponge Vigreux (no packing) Glass beads Glass helices 70 60 moderate 2 small 55 moderate 5 35 moderate Temperature (°C)
The efficiency of a fractional distillation is given as the number of cycles or theoretical plates. Traversing through steps A --> D in Figure 1H-1 (from the distillation handout) is equivalent to having completed two vaporization- condensation cycles or two theoretical plates. Predict the temperature of the initial distillate for the solution used in Figure 1H-1 for a fractional distillation that is rated at four theoretical plates. 120 120 Flgure 1H-1 Temperature- composition diagram for the toluene- cyclohexane system 110 110 Vapor 100 100 B 90 D 90 Liquid 80 80 70 70 60 60 0.25 1.0 toluene mol fraction 0.0 cyclohexane 0.5 0.75 0.0 toluene 1.0 cyclohexane Please give a detailed answer as I am trying to learn and just not sure where to begin with this problem. I was also given this table, but I am not sure if it is applicable to this specific problem. Table 1H-1 Properties of Fractionating Columns Used for Miniscale Distillation Distillation Column packing Boiling point difference required cycles Hold-up Metal sponge Vigreux (no packing) Glass beads Glass helices 70 60 moderate 2 small 55 moderate 5 35 moderate Temperature (°C)
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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Transcribed Image Text:The efficiency of a fractional distillation
is given as the number of cycles or
theoretical plates. Traversing through
steps A --> D in Figure 1H-1 (from the
distillation handout) is equivalent to
having completed two vaporization-
condensation cycles or two theoretical
plates. Predict the temperature of the
initial distillate for the solution used in
Figure 1H-1 for a fractional distillation
that is rated at four theoretical plates.
120
120
Figure 1H-1
110
110
Temperature-
composition diagram
for the toluene-
Vapor
2 100
100
cyclohexane sysiem
90
D 90
Liquid
80
80
70
70
60
60
0.25
1.0 toluene mol fraction
0.0 cyclohexane
0.5
0.75
0.0 toluene
1.0 cyclohexane
Please give a detailed answer as I am
trying to learn and just not sure where
to begin with this problem.
I was also given this table, but I am not
sure if it is applicable to this specific
problem.
Table 1H-1 Properties of Fractionating Columns Used for
Miniscale Distillation
Distillation
Column packing
Boiling point
difference required
cycles
Hold-up
Metal sponge
Vigreux (no packing)
Glass beads
70
60
moderate
small
55
moderate
Glass helices
35
moderate
Temperature (°C)
IN35
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