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4.22 Many specialty chemicals are produced in semibatch reactors tant is added gradually into a batch reactor. This problem concerns the gov- erning equations of such operations without considering chemical reactions. A well-mixed batch reactor initially contains 200 L of pure water. At time t= 0, we start feeding a brine stream with a salt concentration of 180 g/L into the tank at a constant rate of 50 L/min. Calculate: a. The time the salt concentration in the tank is 60 g/L b. The volume of the tank at that time c. The time and salt concentration in the tank when the volume of the tank is 600 L Assume the density of the brine is the same as the density of the water. tconstant Consider the

4.22 Many specialty chemicals are produced in semibatch reactors tant is added gradually into a batch reactor. This problem concerns the gov- erning equations of such operations without considering chemical reactions. A well-mixed batch reactor initially contains 200 L of pure water. At time t= 0, we start feeding a brine stream with a salt concentration of 180 g/L into the tank at a constant rate of 50 L/min. Calculate: a. The time the salt concentration in the tank is 60 g/L b. The volume of the tank at that time c. The time and salt concentration in the tank when the volume of the tank is 600 L Assume the density of the brine is the same as the density of the water. tconstant Consider the

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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c. At what 4.22 Many specialty chemicals are produced in semibatch reactors where a reac- tant is added gradually into a batch reactor. This problem concerns the gov- erning equations of such operations without considering chemical reactions. A well-mixed batch reactor initially contains 200 L of pure water. At time t= 0, we start feeding a brine stream with a salt concentration of 180 g/L into the tank at a constant rate of 50 L/min. Calculate: a. The time the salt concentration in the tank is 60 g/L b. The volume of the tank at that time c. The time and salt concentration in the tank when the volume of the tank is 600 L Assume the density of the brine is the same as the density of the water. 4.33 Solve Problem 4.2 when the feed rate of the brine is not constant. Consider the case where the feed rate is a function of time given by vin(t) = 100-10t (t is in minute and v is in liter/minute), and the exit flow rate is constant at 20 L/min. a. Plot a graph of the salt concentration as a function of time. b. What is the salt concentration when the amount of solution in the tank is the maximum? c. What is the salt concentration of the last drop in the tank?
Transcribed Image Text:c. At what 4.22 Many specialty chemicals are produced in semibatch reactors where a reac- tant is added gradually into a batch reactor. This problem concerns the gov- erning equations of such operations without considering chemical reactions. A well-mixed batch reactor initially contains 200 L of pure water. At time t= 0, we start feeding a brine stream with a salt concentration of 180 g/L into the tank at a constant rate of 50 L/min. Calculate: a. The time the salt concentration in the tank is 60 g/L b. The volume of the tank at that time c. The time and salt concentration in the tank when the volume of the tank is 600 L Assume the density of the brine is the same as the density of the water. 4.33 Solve Problem 4.2 when the feed rate of the brine is not constant. Consider the case where the feed rate is a function of time given by vin(t) = 100-10t (t is in minute and v is in liter/minute), and the exit flow rate is constant at 20 L/min. a. Plot a graph of the salt concentration as a function of time. b. What is the salt concentration when the amount of solution in the tank is the maximum? c. What is the salt concentration of the last drop in the tank?
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