4.9. Inside a distillation column (see Problem 4.8), a downward-flowing liquid and an upward-flowing vapor maintain contact with each other. For reasons we will discuss in greater detail in Chapter 6, the vapor stream becomes increasingly rich in the more volatile components of the mixture as it moves up the column, and the liquid stream is enriched in the less volatile components as it moves down. The vapor leaving the top of the column goes to a condenser. A portion of the condensate is taken off as a product (the overhead product), and the remainder (the reflux) is returned to the top of the column to begin its downward journey as the liquid stream. The condensation process can be represented as shown below: Vapor CONDENSER Condensate CONDENSATE TANK ТОР OF Overhead Product DISTILLATION COLUMN Reflux A distillation column is being used to separate a liquid mixture of ethanol (more volatile) and water (less volatile). A vapor mixture containing 89.0 mole% ethanol and the balance water enters the overhead condenser at a rate of 100 lb-mole/h. The liquid condensate has a density of 49.0 lb,/ft, and Problems 177 the reflux ratio is 3 lbm reflux/lbm overhead product. When the system is operating at steady state, the tank collecting the condensate is half full of liquid and the mean residence time in the tank (volume of liquid/volumetric flow rate of liquid) is 10.0 minutes. Determine the overhead product volumetric flow rate (ft/min) and the condenser tank volume (gal).
4.9. Inside a distillation column (see Problem 4.8), a downward-flowing liquid and an upward-flowing vapor maintain contact with each other. For reasons we will discuss in greater detail in Chapter 6, the vapor stream becomes increasingly rich in the more volatile components of the mixture as it moves up the column, and the liquid stream is enriched in the less volatile components as it moves down. The vapor leaving the top of the column goes to a condenser. A portion of the condensate is taken off as a product (the overhead product), and the remainder (the reflux) is returned to the top of the column to begin its downward journey as the liquid stream. The condensation process can be represented as shown below: Vapor CONDENSER Condensate CONDENSATE TANK ТОР OF Overhead Product DISTILLATION COLUMN Reflux A distillation column is being used to separate a liquid mixture of ethanol (more volatile) and water (less volatile). A vapor mixture containing 89.0 mole% ethanol and the balance water enters the overhead condenser at a rate of 100 lb-mole/h. The liquid condensate has a density of 49.0 lb,/ft, and Problems 177 the reflux ratio is 3 lbm reflux/lbm overhead product. When the system is operating at steady state, the tank collecting the condensate is half full of liquid and the mean residence time in the tank (volume of liquid/volumetric flow rate of liquid) is 10.0 minutes. Determine the overhead product volumetric flow rate (ft/min) and the condenser tank volume (gal).
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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Question
Transcribed Image Text:4.9. Inside a distillation column (see Problem 4.8), a downward-flowing liquid and an upward-flowing
vapor maintain contact with each other. For reasons we will discuss in greater detail in Chapter 6, the
vapor stream becomes increasingly rich in the more volatile components of the mixture as it moves
up the column, and the liquid stream is enriched in the less volatile components as it moves down.
The vapor leaving the top of the column goes to a condenser. A portion of the condensate is taken off
as a product (the overhead product), and the remainder (the reflux) is returned to the top of the
column to begin its downward journey as the liquid stream. The condensation process can be
represented as shown below:
Vapor
CONDENSER
Condensate
CONDENSATE
TANK
ТОР OF
Overhead Product
DISTILLATION
COLUMN
Reflux
A distillation column is being used to separate a liquid mixture of ethanol (more volatile) and
water (less volatile). A vapor mixture containing 89.0 mole% ethanol and the balance water enters the
overhead condenser at a rate of 100 lb-mole/h. The liquid condensate has a density of 49.0 lb,/ft, and
Problems 177
the reflux ratio is 3 lbm reflux/lbm overhead product. When the system is operating at steady state, the
tank collecting the condensate is half full of liquid and the mean residence time in the tank (volume of
liquid/volumetric flow rate of liquid) is 10.0 minutes. Determine the overhead product volumetric flow
rate (ft/min) and the condenser tank volume (gal).
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