9.18 An aqueous solution of furfural contains 4 mol % furfural. It is to be continuously fractionaled at 1 std atm pressure to provide solutions containing 0.1 and 99.5 mol % furfural, respectively. Feed is liquid at the bubble point. Equilibrium data ("The Chemical Engineers' Handbook," 4th ed., p. 13-5), x, y = mole fraction furfural: 1, °C y* 1, °C y* 100. 100.6 0.80 0.11 0 10
9.18 An aqueous solution of furfural contains 4 mol % furfural. It is to be continuously fractionaled at 1 std atm pressure to provide solutions containing 0.1 and 99.5 mol % furfural, respectively. Feed is liquid at the bubble point. Equilibrium data ("The Chemical Engineers' Handbook," 4th ed., p. 13-5), x, y = mole fraction furfural: 1, °C y* 1, °C y* 100. 100.6 0.80 0.11 0 10
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:9.18 An aqueous solution of furfural contains 4 mol % furfural. It is to be continuously fractionated
at 1 std atm pressure to provide solutions containing 0.1 and 99.5 mol % furfural, respectively. Feed
is liquid at the bubble point. Equilibrium data ("The Chemical Engineers' Handbook," 4th ed., p.
13-5), x, y mole fraction furfural:
1, °C
y*
1, °C
y*
100.6
0.80
0.11
100.
98.56
0.19
0.32
0.64
109.5
0.90
0.055
0.080
0.01
122.5
146.0
154.8
0.92
0.94
0.96
0.98
98.07
0.02
97.90
97.90
0.092
0.092
0.04
0.092
0.81
97.90
0.50
0.092
158.8
0.90
98.7
0.70
0.095
161.7
1.00
1.00
(a) Arrange a scheme for the separation using kettle-type reboilers, and determine the number
of theoretical trays required for a vapor boilup rate of 1.25 times the minimum for an infinite
number of trays.
(b) Repeat part (a) but use open steam at essentially atmospheric pressure for the tower
delivering the water-rich product, with 1.25 times the minimum steam and vapor boilup rates.
(c) Which scheme incurs the greater furfural loss to the water-rich product?
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