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Take a basis of 100 mol fed to the column. Draw and completely label a flowchart, and for each of six systems (overall process, column, condenser, reboiler, column and condenser, and column and reboiler), do the degree-of-freedom analysis. Identify which of the following systems have zero degrees of freedom and thus would be good starting points for analysis. Choose one. Reboiler Only Column and Reboiler Overall System O Column Only

Take a basis of 100 mol fed to the column. Draw and completely label a flowchart, and for each of six systems (overall process, column, condenser, reboiler, column and condenser, and column and reboiler), do the degree-of-freedom analysis. Identify which of the following systems have zero degrees of freedom and thus would be good starting points for analysis. Choose one. Reboiler Only Column and Reboiler Overall System O Column Only

Introduction to Chemical Engineering Thermodynamics
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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Degrees of Freedom Take a basis of 100 mol fed to the column. Draw and completely label a flowchart, and for each of six systems (overall process, column, condenser, reboiler, column and condenser, and column and reboiler), do the degree-of-freedom analysis. Identify which of the following systems have zero degrees of freedom and thus would be good starting points for analysis. Choose one. Reboiler Only O Column and Reboiler □ Overall System O Column Only
Transcribed Image Text:Degrees of Freedom Take a basis of 100 mol fed to the column. Draw and completely label a flowchart, and for each of six systems (overall process, column, condenser, reboiler, column and condenser, and column and reboiler), do the degree-of-freedom analysis. Identify which of the following systems have zero degrees of freedom and thus would be good starting points for analysis. Choose one. Reboiler Only O Column and Reboiler □ Overall System O Column Only
Feed 100 mol Xy (mol B/mol) 1-x, (mol T/mol) Boilup mol B(v/mol] Bottoms product REBOILER almol Bly/moll Inside the column a liquid stream flows downward and a vapor stream rises. At each point in the column some of the liquid vaporizes and some of the vapor condenses. The vapor leaving the top of the column, which contains 97.0 mole % benzene, is completely condensed and split into two equal fractions: one is taken off as the overhead product stream, and the other (the reflux) is recycled to the top of the column. The overhead product stream contains 92.2 % of the benzene fed to the column. The liquid leaving the bottom of the column is fed to a partial reboiler in which 40.0 % of it is vaporized. The vapor generated in the reboiler (the boilup) is recycled to become the rising vapor stream in the column, and the residual reboiler liquid is taken off as the bottom product stream. The compositions of the streams leaving the reboiler are governed by the relation YR/(1-YB) = 2.25 xa/(1-x) where yg and xg are the mole fractions of benzene in the vapor and liquid streams, respectively. DISTILLATION COLUMN
Transcribed Image Text:Feed 100 mol Xy (mol B/mol) 1-x, (mol T/mol) Boilup mol B(v/mol] Bottoms product REBOILER almol Bly/moll Inside the column a liquid stream flows downward and a vapor stream rises. At each point in the column some of the liquid vaporizes and some of the vapor condenses. The vapor leaving the top of the column, which contains 97.0 mole % benzene, is completely condensed and split into two equal fractions: one is taken off as the overhead product stream, and the other (the reflux) is recycled to the top of the column. The overhead product stream contains 92.2 % of the benzene fed to the column. The liquid leaving the bottom of the column is fed to a partial reboiler in which 40.0 % of it is vaporized. The vapor generated in the reboiler (the boilup) is recycled to become the rising vapor stream in the column, and the residual reboiler liquid is taken off as the bottom product stream. The compositions of the streams leaving the reboiler are governed by the relation YR/(1-YB) = 2.25 xa/(1-x) where yg and xg are the mole fractions of benzene in the vapor and liquid streams, respectively. DISTILLATION COLUMN
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