Consider the molar fraction of feed as 50% benzene and 50% toluene.Consider a feed flow rate of 550 Ibmole / hrTips for charting:To draw a diagram, you need to consider several temperatures and obtain the vapor pressure of each component for these temperatures. These temperatures must be between the boiling range of two substances, benzene and toluene.Because you have considered a few temperatures, how many values are obtained for the volatility coefficient or alpha, and after the obtained alphas, you average and use the average alpha as the basis for drawing the graph. A tray distillation column tower is to be designed to distill 450 Ibmol/h of a binary mixture of 60mole % benzene and 40 mole % toluene. A liquid distillate and a liquid bottoms product of 95mol % and 5 mol % benzene, respectively, are to be produced. The feed is pre-heated so that itenters the column with a molar percent vaporization equal to the distillate-to-feed ratio.Use the McCabe-Thiele method to compute the following, assuming uniform pressure of 1 atmthroughout the column:Minimum number of theoretical stages;Minimum Reflux Ratio;(a)(b)(c)(d)Number of equilibrium stages for a reflux-to-minimum reflux ratio of 1.3; andOptimum location of the feed stageThe Antoine Equations of State for Benzene and Toluene are as follows:Log1oPvap = A - B/(t + C) where Pap is n mm Hg, t is in deg CChemicalFormulaRange, deg CABBenzeneCH6C>Hs6.905651211.033220.790Toluene6.953341343.943219.377

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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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Consider the molar fraction of feed as 50% benzene and 50% toluene.
Consider a feed flow rate of 550 Ibmole / hr

Tips for charting:
To draw a diagram, you need to consider several temperatures and obtain the vapor pressure of each component for these temperatures. These temperatures must be between the boiling range of two substances, benzene and toluene.

Because you have considered a few temperatures, how many values are obtained for the volatility coefficient or alpha, and after the obtained alphas, you average and use the average alpha as the basis for drawing the graph.

A tray distillation column tower is to be designed to distill 450 Ibmol/h of a binary mixture of 60
mole % benzene and 40 mole % toluene. A liquid distillate and a liquid bottoms product of 95
mol % and 5 mol % benzene, respectively, are to be produced. The feed is pre-heated so that it
enters the column with a molar percent vaporization equal to the distillate-to-feed ratio.
Use the McCabe-Thiele method to compute the following, assuming uniform pressure of 1 atm
throughout the column:
Minimum number of theoretical stages;
Minimum Reflux Ratio;
(a)
(b)
(c)
(d)
Number of equilibrium stages for a reflux-to-minimum reflux ratio of 1.3; and
Optimum location of the feed stage
The Antoine Equations of State for Benzene and Toluene are as follows:
Log1oPvap = A - B/(t + C) where Pap is n mm Hg, t is in deg C
Chemical
Formula
Range, deg C
A
B
Benzene
CH6
C>Hs
6.90565
1211.033
220.790
Toluene
6.95334
1343.943
219.377

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