A binary mixture of n-heptane and n-octane at its boiling point containing 70% (mol percent) of heptane is to be continously distilled to give a top product of 98 mol % and a bottom product of 1 mol % heptane. The reflux ratio is 3 and the vapour pressure of n- heptane is twice the vapour pressure of n-octane at the same temperature. a) Obtain the number of theoritical plates required? b) Calculate the min number of theoritical plates (Nmin)? c) Calculate the min number of reflux ratio (Rmin)?

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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A binary mixture of n-heptane and n-octane at its boiling point
containing 70% (mol percent) of heptane is to be continously
distilled to give a top product of 98 mol % and a bottom product of
1 mol % heptane. The reflux ratio is 3 and the vapour pressure of n-
heptane is twice the vapour pressure of n-octane at the same
temperature.
a) Obtain the number of theoritical plates required?
b) Calculate the min number of theoritical plates (Nmin)?
c) Calculate the min number of reflux ratio (Rmin)?
Transcribed Image Text:A binary mixture of n-heptane and n-octane at its boiling point containing 70% (mol percent) of heptane is to be continously distilled to give a top product of 98 mol % and a bottom product of 1 mol % heptane. The reflux ratio is 3 and the vapour pressure of n- heptane is twice the vapour pressure of n-octane at the same temperature. a) Obtain the number of theoritical plates required? b) Calculate the min number of theoritical plates (Nmin)? c) Calculate the min number of reflux ratio (Rmin)?
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