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2) Number of Ideal Stages for a Hydrocarbon Distillation A four component mixture of ethylbenzene (zı=0.06, aı=1.25), p-xylene (z2=0.40, a2=1.15), 0-xylene (z3=0.30, a3=1.00) and cumene (z4=0.24, a4=0.68) is at its bubble point and enters a column at 80 kmole/hr. We would like to recover 99% of the p-xylene in the distillate and 96% of the o-xylene in the bottoms product. a) Determine the minimum number of stages, Fenske Nmin. b) Determine Rmin from Underwood assuming the relative volatilities provided. c) Determine the ideal number of stages required if a reflux ratio of three times the minimum is used. d) Determine N, R values using Gilliland, et al. How do the number of stages compare?

2) Number of Ideal Stages for a Hydrocarbon Distillation A four component mixture of ethylbenzene (zı=0.06, aı=1.25), p-xylene (z2=0.40, a2=1.15), 0-xylene (z3=0.30, a3=1.00) and cumene (z4=0.24, a4=0.68) is at its bubble point and enters a column at 80 kmole/hr. We would like to recover 99% of the p-xylene in the distillate and 96% of the o-xylene in the bottoms product. a) Determine the minimum number of stages, Fenske Nmin. b) Determine Rmin from Underwood assuming the relative volatilities provided. c) Determine the ideal number of stages required if a reflux ratio of three times the minimum is used. d) Determine N, R values using Gilliland, et al. How do the number of stages compare?

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
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2) Number of Ideal Stages for a Hydrocarbon Distillation A four component mixture of ethylbenzene (zı=0.06, ai=1.25), p-xylene (z2=0.40, a2=1.15), 0-xylene (z3=0.30, a3=1.00) and cumene (z4=0.24, a4=0.68) is at its bubble point and enters a column at 80 kmole/hr. We would like to recover 99% of the p-xylene in the distillate and 96% of the o-xylene in the bottoms product. a) Determine the minimum number of stages, Fenske Nmin. b) Determine Rmin from Underwood assuming the relative volatilities provided. c) Determine the ideal number of stages required if a reflux ratio of three times the minimum is used. d) Determine N, R values using Gilliland, et al. How do the number of stages compare?
Transcribed Image Text:2) Number of Ideal Stages for a Hydrocarbon Distillation A four component mixture of ethylbenzene (zı=0.06, ai=1.25), p-xylene (z2=0.40, a2=1.15), 0-xylene (z3=0.30, a3=1.00) and cumene (z4=0.24, a4=0.68) is at its bubble point and enters a column at 80 kmole/hr. We would like to recover 99% of the p-xylene in the distillate and 96% of the o-xylene in the bottoms product. a) Determine the minimum number of stages, Fenske Nmin. b) Determine Rmin from Underwood assuming the relative volatilities provided. c) Determine the ideal number of stages required if a reflux ratio of three times the minimum is used. d) Determine N, R values using Gilliland, et al. How do the number of stages compare?
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