The vapor-liquid equilibrium data for heptane - ethylbenzene at 1 atm pressure is given below: 0.10 0.20 0.40 0.50 0.60 0.70 0.90 1 0.25 0.45 0.65 0.74 0.82 0.86 0.96 1 A feed mixture containing 40 mol% heptane and 60 mol% ethylbenzene is to be fractionated at 1 atm pressure to produce a distillate containing 95 mol% heptane and a bottom product stream containing 96 mol% ethylbenzene. Latent heat, kJ/kmol 35,000 Heat capacity, kJ/kmol-K 220 www N Heptane Ethylbenzene 40,000 183 Feed temperature 30°C Condenser temperature 95°C Reboiler temperature 99°C Determine the minimum reflux ratio if the feed is: a. a saturated liquid b. a saturated vapor an equilibrium mixture of liquid and vapor, with 60% vapor с. Determine the minimum number of theoretical plates using: a. the McCabe-Thiele graphical method b. the Fenske equation For a saturated vapor feed and a reflux ratio that is twice the minimum, determine: a. the number of theoretical stages using the McCabe-Thiele graphical method b. the optimum feed stage location the actual number of stages if the efficiency is 60% C.
The vapor-liquid equilibrium data for heptane - ethylbenzene at 1 atm pressure is given below: 0.10 0.20 0.40 0.50 0.60 0.70 0.90 1 0.25 0.45 0.65 0.74 0.82 0.86 0.96 1 A feed mixture containing 40 mol% heptane and 60 mol% ethylbenzene is to be fractionated at 1 atm pressure to produce a distillate containing 95 mol% heptane and a bottom product stream containing 96 mol% ethylbenzene. Latent heat, kJ/kmol 35,000 Heat capacity, kJ/kmol-K 220 www N Heptane Ethylbenzene 40,000 183 Feed temperature 30°C Condenser temperature 95°C Reboiler temperature 99°C Determine the minimum reflux ratio if the feed is: a. a saturated liquid b. a saturated vapor an equilibrium mixture of liquid and vapor, with 60% vapor с. Determine the minimum number of theoretical plates using: a. the McCabe-Thiele graphical method b. the Fenske equation For a saturated vapor feed and a reflux ratio that is twice the minimum, determine: a. the number of theoretical stages using the McCabe-Thiele graphical method b. the optimum feed stage location the actual number of stages if the efficiency is 60% 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 vapor-liquid equilibrium data for heptane - ethylbenzene at 1 atm pressure is given below:
0.10
0.20
0.40
0.50
0.60
0.70
0.90
1.
y
0.25
0.45
0.65
0.74
0.82
0.86
0.96
1
A feed mixture containing 40 mol% heptane and 60 mol% ethylbenzene is to be fractionated at 1 atm pressure to produce a
distillate containing 95 mol% heptane and a bottom product stream containing 96 mol% ethylbenzene.
Heat capacity, kJ/kmol-K
220
Latent heat, kJ/kmol
ww
Heptane
35,000
Ethylbenzene
40,000
183
30°C
Feed temperature
Condenser temperature
95°C
Reboiler temperature
99°C
6. Determine the minimum reflux ratio if the feed is:
a. a saturated liquid
b. a saturated vapor
an equilibrium mixture of liquid and vapor, with 60% vapor
C.
7. Determine the minimum number of theoretical plates using:
a. the McCabe-Thiele graphical method
b. the Fenske equation
8. For a saturated vapor feed and a reflux ratio that is twice the minimum, determine:
a. the number of theoretical stages using the McCabe-Thiele graphical method
b. the optimum feed stage location
the actual number of stages if the efficiency is 60%
С.
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