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The industrial alcohol is fed to an intermediate level of a distillation column. Benzene-rich stream is also fed to the column, commonly known as 'reflux'. The vapour stream (overhead product) leaves the top of the column is a three-component mixture (azeotropic mixture), consisting of benzene, ethanol and water while, the liquid product leaves the bottom column as pure ethanol. The overhead vapour product passes through a condenser and is completely condensed to liquid. However, this liquid is actually having two separate immiscible phases, which are then separated in a decanter into an upper layer (benzene-rich) where this stream is then mixed with pure benzene as make-up for losses. This mixture is fed to the top of column, as above mentioned. The lower layer, rich in ethanol and water is sent to another unit for benzene recovery. Table 1 shows the component weight analysis for each stream. Feed Component Ethanol (E) 95.0 5.0 Water (W) Benzene (B) Table 1: Analysis of % w/w Bottoms Overhead Upper Layer 16.3 product 100.0 vapour 18.5 7.5 74 2.7 81.0 Lower Make-up layer 39.8 54.3 5.9 100.00 With the aid of a completely-labelled flowchart, for a feed rate to the process of 1200 kg/h, determine the production rate of absolute alcohol (kg/h), percentage recovery of ethanol from feed as pure alcohol, flow rate (kg/h) of make-up benzene (pure benzene) and flow rates of upper and lower layers in the decanter (kg/h).

The industrial alcohol is fed to an intermediate level of a distillation column. Benzene-rich stream is also fed to the column, commonly known as 'reflux'. The vapour stream (overhead product) leaves the top of the column is a three-component mixture (azeotropic mixture), consisting of benzene, ethanol and water while, the liquid product leaves the bottom column as pure ethanol. The overhead vapour product passes through a condenser and is completely condensed to liquid. However, this liquid is actually having two separate immiscible phases, which are then separated in a decanter into an upper layer (benzene-rich) where this stream is then mixed with pure benzene as make-up for losses. This mixture is fed to the top of column, as above mentioned. The lower layer, rich in ethanol and water is sent to another unit for benzene recovery. Table 1 shows the component weight analysis for each stream. Feed Component Ethanol (E) 95.0 5.0 Water (W) Benzene (B) Table 1: Analysis of % w/w Bottoms Overhead Upper Layer 16.3 product 100.0 vapour 18.5 7.5 74 2.7 81.0 Lower Make-up layer 39.8 54.3 5.9 100.00 With the aid of a completely-labelled flowchart, for a feed rate to the process of 1200 kg/h, determine the production rate of absolute alcohol (kg/h), percentage recovery of ethanol from feed as pure alcohol, flow rate (kg/h) of make-up benzene (pure benzene) and flow rates of upper and lower layers in the decanter (kg/h).

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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i really need help to calculate this i already draw the flowchart please help ?
The industrial alcohol is fed to an intermediate level of a distillation column. Benzene-rich stream is also fed to the column, commonly known as 'reflux'. The vapour stream (overhead product) leaves the top of the column is a three-component mixture (azeotropic mixture), consisting of benzene, ethanol and water while, the liquid product leaves the bottom column as pure ethanol. The overhead vapour product passes through a condenser and is completely condensed to liquid. However, this liquid is actually having two separate immiscible phases, which are then separated in a decanter into an upper layer (benzene-rich) where this stream is then mixed with pure benzene as make-up for losses. This mixture is fed to the top of column, as above mentioned. The lower layer, rich in ethanol and water is sent to another unit for benzene recovery. Table 1 shows the component weight analysis for each stream. Table 1: Analysis of % w/w Upper Layer Component Feed Bottoms Overhead Lower Make-up layer product 100.0 vapour Ethanol (E) Water (W) Benzene (B) 95.0 18.5 16.3 39.8 5.0 7.5 2.7 54.3 74 81.0 5.9 100.00 With the aid of a completely-labelled flowchart, for a feed rate to the process of 1200 kg/h, determine the production rate of absolute alcohol (kg/h). percentage recovery of ethanol from feed as pure alcohol, flow rate (kg/h) of make-up benzene (pure benzene) and flow rates of upper and lower layers in the decanter (kg/h).
Transcribed Image Text:The industrial alcohol is fed to an intermediate level of a distillation column. Benzene-rich stream is also fed to the column, commonly known as 'reflux'. The vapour stream (overhead product) leaves the top of the column is a three-component mixture (azeotropic mixture), consisting of benzene, ethanol and water while, the liquid product leaves the bottom column as pure ethanol. The overhead vapour product passes through a condenser and is completely condensed to liquid. However, this liquid is actually having two separate immiscible phases, which are then separated in a decanter into an upper layer (benzene-rich) where this stream is then mixed with pure benzene as make-up for losses. This mixture is fed to the top of column, as above mentioned. The lower layer, rich in ethanol and water is sent to another unit for benzene recovery. Table 1 shows the component weight analysis for each stream. Table 1: Analysis of % w/w Upper Layer Component Feed Bottoms Overhead Lower Make-up layer product 100.0 vapour Ethanol (E) Water (W) Benzene (B) 95.0 18.5 16.3 39.8 5.0 7.5 2.7 54.3 74 81.0 5.9 100.00 With the aid of a completely-labelled flowchart, for a feed rate to the process of 1200 kg/h, determine the production rate of absolute alcohol (kg/h). percentage recovery of ethanol from feed as pure alcohol, flow rate (kg/h) of make-up benzene (pure benzene) and flow rates of upper and lower layers in the decanter (kg/h).
Make up benzeo (Mm) 817.8 Vapom (v) Upper laye, Conter Decan ten benRne Blow se %3D 7.5.31= 8:14 F=200kg/h Lown Leye 1. S= 3 benzae ME
Transcribed Image Text:Make up benzeo (Mm) 817.8 Vapom (v) Upper laye, Conter Decan ten benRne Blow se %3D 7.5.31= 8:14 F=200kg/h Lown Leye 1. S= 3 benzae ME
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