Benzene / Toluene System. A rectification column is fed 100 kgmole/hr of a mixture that is 50 mole % benzene - 50 mole % toluene at 101.325kPa (abs) pressure. The distillate is to contain 94 mole % benzene and the bottoms 90 mole % toluene. The reflux ratio is 3.0:1.0. Assuming that the feed mixture is liquid at its boiling point (saturated liquid) determine … a) Calculate the flowrates (mol/hr) of the distillate and bottoms. b) Determine the theoretical number of trays and the feed tray number for the specified operation. c) Determine the minimum reflux ratio, RMIN and the minimum number of theoretical trays at total reflux. Assuming that the feed mixture is saturated vapor determine … d) Determine the theoretical number of trays and the feed tray number for the specified operation. e) Determine the minimum reflux ratio, RMIN and the minimum number of theoretical trays at total reflux. Vapor Pressure Temperature Benzene Toluene T (F) T (K) T (C) kPa kPa 176.3 353.3 80.2 101.475 39.026 182.4 356.7 83.5 112.5 43.808 188.5 360.1 86.9 124.5 49.050 194.6 363.5 90.3 137.4 54.783 200.7 366.9 93.7 151.3 61.041 206.8 370.2 97.1 166.3 67.856 212.9 373.6 100.5 182.4 75.262 219.0 377.0 103.9 199.7 83.297 225.1 380.4 107.3 218.2 91.995 231.2 383.8 110.7 238.1 101.394

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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Benzene / Toluene System.

A rectification column is fed 100 kgmole/hr of a mixture that is 50 mole % benzene - 50 mole % toluene at 101.325kPa (abs) pressure. The distillate is to contain 94 mole % benzene and the bottoms 90 mole % toluene. The reflux ratio is 3.0:1.0. Assuming that the feed mixture is liquid at its boiling point (saturated liquid) determine …

a) Calculate the flowrates (mol/hr) of the distillate and bottoms.

b) Determine the theoretical number of trays and the feed tray number for the specified operation.

c) Determine the minimum reflux ratio, RMIN and the minimum number of theoretical trays at total reflux. Assuming that the feed mixture is saturated vapor determine …

d) Determine the theoretical number of trays and the feed tray number for the specified operation.

e) Determine the minimum reflux ratio, RMIN and the minimum number of theoretical trays at total reflux.

			Vapor Pressure
Temperature		Benzene	Toluene
T (F)	T (K)	T (C)	kPa	kPa
176.3	353.3	80.2	101.475	39.026
182.4	356.7	83.5	112.5	43.808
188.5	360.1	86.9	124.5	49.050
194.6	363.5	90.3	137.4	54.783
200.7	366.9	93.7	151.3	61.041
206.8	370.2	97.1	166.3	67.856
212.9	373.6	100.5	182.4	75.262
219.0	377.0	103.9	199.7	83.297
225.1	380.4	107.3	218.2	91.995
231.2	383.8	110.7	238.1	101.394

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