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MASS BALANCE A mixture of benzene (C6H6), toluene (C6H5CH3) and ethylbenzene (C6H5C2H5) is separated in a series of two evaporators. The feed containing benzene (B), toluene (T) and ethylbenzene (EB) in a mole ratio of 3:1:3 respectively enters the first evaporator (E₁) at a rate of 140 kmol h-¹. Vapour (V₁) and liquid (L₁) streams are produced out of the first evaporator. The vapour stream V₁ consists of benzene (95 mole%) and the rest - toluene. The vapour stream V₁ leaves as a product and the liquid stream L₁ is fed to the second evaporator. Another two product streams leave the second evaporator - a vapour (V₂) and a liquid (L2). The vapour stream V2 contains benzene (30 mole%) and the rest - toluene. The liquid stream L2 contains 92 mole% ethylbenzene and the rest - toluene. (a) 1 Using the notation above draw the process flow diagram showing the names of the streams and their components. (b) (c) Calculate all material streams' rates and compositions. What feed rate would be needed to produce 100 tonnes per week of the liquid product of the second evaporator L2? (d) If benzene vapour in stream V₁ is the desired product, how could you increase the: (i) product rate? benzene mole fraction?

MASS BALANCE A mixture of benzene (C6H6), toluene (C6H5CH3) and ethylbenzene (C6H5C2H5) is separated in a series of two evaporators. The feed containing benzene (B), toluene (T) and ethylbenzene (EB) in a mole ratio of 3:1:3 respectively enters the first evaporator (E₁) at a rate of 140 kmol h-¹. Vapour (V₁) and liquid (L₁) streams are produced out of the first evaporator. The vapour stream V₁ consists of benzene (95 mole%) and the rest - toluene. The vapour stream V₁ leaves as a product and the liquid stream L₁ is fed to the second evaporator. Another two product streams leave the second evaporator - a vapour (V₂) and a liquid (L2). The vapour stream V2 contains benzene (30 mole%) and the rest - toluene. The liquid stream L2 contains 92 mole% ethylbenzene and the rest - toluene. (a) 1 Using the notation above draw the process flow diagram showing the names of the streams and their components. (b) (c) Calculate all material streams' rates and compositions. What feed rate would be needed to produce 100 tonnes per week of the liquid product of the second evaporator L2? (d) If benzene vapour in stream V₁ is the desired product, how could you increase the: (i) product rate? benzene mole fraction?

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
Problem 1.1P
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19CAPE102002s2 P No * 1 18CAPE102002s2 ☆ (b) (c) 19CAPE102001s2 18CAPE102001s2 X MASS BALANCE A mixture of benzene (C6H6), toluene (C6H5CH3) and ethylbenzene (C6H5C2H5) is separated in a series of two evaporators. The feed containing benzene (B), toluene (T) and ethylbenzene (EB) in a mole ratio of 3:1:3 respectively enters the first evaporator (E₁) at a rate of 140 kmol h-1. Vapour (V₁) and liquid (L₁) streams are produced out of the first evaporator. The vapour stream V₁ consists of benzene (95 mole%) and the rest - toluene. The vapour stream V₁ leaves as a product and the liquid stream L₁ is fed to the second evaporator. Another two product streams leave the second evaporator - a vapour (V₂) and a liquid (L2). The vapour stream V2 contains benzene (30 mole%) and the rest - toluene. The liquid stream L2 contains 92 mole% ethylbenzene and the rest - toluene. (a) CAPE1020 M Using the notation above draw the process flow diagram showing the names of the streams and their components. Calculate all material streams' rates and compositions. What feed rate would be needed to produce 100 tonnes per week of the liquid product of the second evaporator L2? (d) If benzene vapour in stream V₁ is the desired product, how could you increase the: (i) product rate? (ii) benzene mole fraction?
Transcribed Image Text:19CAPE102002s2 P No * 1 18CAPE102002s2 ☆ (b) (c) 19CAPE102001s2 18CAPE102001s2 X MASS BALANCE A mixture of benzene (C6H6), toluene (C6H5CH3) and ethylbenzene (C6H5C2H5) is separated in a series of two evaporators. The feed containing benzene (B), toluene (T) and ethylbenzene (EB) in a mole ratio of 3:1:3 respectively enters the first evaporator (E₁) at a rate of 140 kmol h-1. Vapour (V₁) and liquid (L₁) streams are produced out of the first evaporator. The vapour stream V₁ consists of benzene (95 mole%) and the rest - toluene. The vapour stream V₁ leaves as a product and the liquid stream L₁ is fed to the second evaporator. Another two product streams leave the second evaporator - a vapour (V₂) and a liquid (L2). The vapour stream V2 contains benzene (30 mole%) and the rest - toluene. The liquid stream L2 contains 92 mole% ethylbenzene and the rest - toluene. (a) CAPE1020 M Using the notation above draw the process flow diagram showing the names of the streams and their components. Calculate all material streams' rates and compositions. What feed rate would be needed to produce 100 tonnes per week of the liquid product of the second evaporator L2? (d) If benzene vapour in stream V₁ is the desired product, how could you increase the: (i) product rate? (ii) benzene mole fraction?
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