We wish to flash distill isothermally a mixture containing 45 mole% of benzene and 55 mole% of toluene. Feed rate to the still is 700 moles/h. Equilibrium data for the benzene-toluene system can be approximated with a constant relative volatility of 2.5, where benzene is the more volatile component. Operation of the still is at 1 atm. a. If 60% of the feed is evaporated, find the liquid and vapor compositions b. If we desire a vapor composition of 60 mole%, what is the corresponding liquid composition and what are the liquid and vapor flow rates? c. Find the compositions and flow rates of all unknown streams for a two stage flash cascade where 40% of the feed is flashed in the first stage and the liquid product is sent to a second flash chamber where 30% is flashed.
We wish to flash distill isothermally a mixture containing 45 mole% of benzene and 55 mole% of toluene. Feed rate to the still is 700 moles/h. Equilibrium data for the benzene-toluene system can be approximated with a constant relative volatility of 2.5, where benzene is the more volatile component. Operation of the still is at 1 atm. a. If 60% of the feed is evaporated, find the liquid and vapor compositions b. If we desire a vapor composition of 60 mole%, what is the corresponding liquid composition and what are the liquid and vapor flow rates? c. Find the compositions and flow rates of all unknown streams for a two stage flash cascade where 40% of the feed is flashed in the first stage and the liquid product is sent to a second flash chamber where 30% is flashed.
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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We wish to flash distill isothermally a mixture containing 45 mole% of benzene and 55 mole%
of toluene. Feed rate to the still is 700 moles/h. Equilibrium data for the benzene-toluene system
can be approximated with a constant relative volatility of 2.5, where benzene is the more
volatile component. Operation of the still is at 1 atm.
a. If 60% of the feed is evaporated, find the liquid and vapor compositions
b. If we desire a vapor composition of 60 mole%, what is the corresponding liquid
composition and what are the liquid and vapor flow rates?
c. Find the compositions and flow rates of all unknown streams for a two stage flash cascade
where 40% of the feed is flashed in the first stage and the liquid product is sent to a
second flash chamber where 30% is flashed.
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