The feed to a two-column fractionating system is 30,000 lb,/h of a mixture containing 50% benzene (B), 30% toluene (T), and 20% xylene (X). The feed is introduced into column I and results in an overload consisting of 95% benzene, 3% toluene, and 2% xylene. The bottoms from column I are fed to the second column, resulting in an overhead from column II containing 3% benzene, 95% toluene, and 2% xylene (see Figure P2.19). Assume that 52% of the feed appears as overhead in the first column and that 75% of the benzene fed to the second column appears as overhead, calculate the composition and flow of the bottoms stream from the second column.

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
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The feed to a two-column fractionating system is 30,000 lb/h of a mixture
containing 50% benzene (B), 30% toluene (T), and 20% xylene (X). The
feed is introduced into column I and results in an overload consisting of 95%
benzene, 3% toluene, and 2% xylene. The bottoms from column I åre fed
to the second column, resulting in an overhead from column II containing
3% benzene, 95% toluene, and 2% xylene (see Figure P2.19). Assume that
52% of the feed appears as overhead in the first column and that 75% of
the benzene fed to the second column appears as overhead, calculate the
composition and flow of the bottoms stream from the second column.
95% B
3% T
2% X
3% B
95% T
2% X
Column
Column
50% B
I3D
30% T
20% X
30,000 Ib/h
B
T.
Figure P2.19
Transcribed Image Text:The feed to a two-column fractionating system is 30,000 lb/h of a mixture containing 50% benzene (B), 30% toluene (T), and 20% xylene (X). The feed is introduced into column I and results in an overload consisting of 95% benzene, 3% toluene, and 2% xylene. The bottoms from column I åre fed to the second column, resulting in an overhead from column II containing 3% benzene, 95% toluene, and 2% xylene (see Figure P2.19). Assume that 52% of the feed appears as overhead in the first column and that 75% of the benzene fed to the second column appears as overhead, calculate the composition and flow of the bottoms stream from the second column. 95% B 3% T 2% X 3% B 95% T 2% X Column Column 50% B I3D 30% T 20% X 30,000 Ib/h B T. Figure P2.19
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