Question 2. A mixture that contains 46 wt% acetone (CH.COCH:), 27% acetic acid (CH.COOH)., and 27% acetic anhydride [(CH3CO)20] is distilled at P= 1 atm. The feed enters the distillation column at T= 348 K aa rate of 15000 kgh. The distillate (overhead product) is essentially pure acetone, and the bottoms product contains 1% of the acetone in the feed. The vapor effluent from the top of the column enters a condenser a 329K and emerges as a liquid at 303 K. Half of the condensate is withdrawn as the overhead product, and the remainder is refluxed back to the column. The liquid leaving the bottom of the column goes into a steam-beated reboiler, in which it is partially vaporized. The vapor leaving the eboiker is retumed to the column at a temperature of 398 K. and the residual liquid, also at 398 K. constitutes the bottoms product. a) Calculate the mass flow rates and compositions of the product streams. b) Calculate the condenser cooling requirement QckJ/h). e) Use an overall energy balance to determine the reboiler heating requirement Qrikih). (d) If the reboiler heat is provided by the condensation of saturated steam at 10 bar gange, at what rate mast steam be fed? Column overhead Acetone (v), 329 K CONDENSER Distillate product Acetone (, 303 K Feed 15.000 kgh DISTILLATION COLUMN 46 wt acetone (D Vapor. 32 moles acetone, 73.8% acetic acid 23.0% acetic anhydride 27 wt acetic acid ) 27 wes acetic anhydride () 348 K 398 K REBOILER Bottoms product ) 1% of acetone in feed +acetic acid + acetic anhydride 398 K
Question 2. A mixture that contains 46 wt% acetone (CH.COCH:), 27% acetic acid (CH.COOH)., and 27% acetic anhydride [(CH3CO)20] is distilled at P= 1 atm. The feed enters the distillation column at T= 348 K aa rate of 15000 kgh. The distillate (overhead product) is essentially pure acetone, and the bottoms product contains 1% of the acetone in the feed. The vapor effluent from the top of the column enters a condenser a 329K and emerges as a liquid at 303 K. Half of the condensate is withdrawn as the overhead product, and the remainder is refluxed back to the column. The liquid leaving the bottom of the column goes into a steam-beated reboiler, in which it is partially vaporized. The vapor leaving the eboiker is retumed to the column at a temperature of 398 K. and the residual liquid, also at 398 K. constitutes the bottoms product. a) Calculate the mass flow rates and compositions of the product streams. b) Calculate the condenser cooling requirement QckJ/h). e) Use an overall energy balance to determine the reboiler heating requirement Qrikih). (d) If the reboiler heat is provided by the condensation of saturated steam at 10 bar gange, at what rate mast steam be fed? Column overhead Acetone (v), 329 K CONDENSER Distillate product Acetone (, 303 K Feed 15.000 kgh DISTILLATION COLUMN 46 wt acetone (D Vapor. 32 moles acetone, 73.8% acetic acid 23.0% acetic anhydride 27 wt acetic acid ) 27 wes acetic anhydride () 348 K 398 K REBOILER Bottoms product ) 1% of acetone in feed +acetic acid + acetic anhydride 398 K
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 2.
A mixture that contains 46 wt% acetone (CH.COCH:), 27% acetic acid (CH.COOH), and 27% acetic
anhydride [(CH3CO)20] is distilled at P= 1 atm. The feed enters the distillation column at T = 348 K
at a rate of 15000 kg/h. The distillate (overhead product) is essentially pure acetone, and the bottoms
product contains 1% of the acetone in the feed. The vapor effluent from the top of the column enters a
condenser at 329K and emerges as a liquid at 303 K. Half of the condensate is withdrawn as the
overhead product, and the remainder is refluxed back to the column. The liquid leaving the bottom of
the column goes into a steam-heated reboiler, in which it is partially vaporized. The vapor leaving the
reboiker is retumed to the column at a temperature of 398 K, and the residual liquid, also at 398 K,
constitutes the bottoms product.
(a) Calculate the mass flow rates and compositions of the product streams.
(b) Calculate the condenser cooling requirement Qc(k/h).
c) Use an overall encrgy balance to determine the reboiler heating requirement QrkJ/h).
(d) If the reboiler heat is provided by the condensation of saturated steam at 10 bar gauge, at what rate
must steam be fed?
Column overhead
Acetone (v), 329 K
CONDENSER
Distillate product
Acetone (), 303 K
Feed 15.000 kgh
DISTILLATION
COLUMN
46 wt% acetone (I
27 wt% acetic acid (1)
Vapor: 3.2 molek acetone, 73.8% acetic acid,
23.0% acetic anhydride
27 wi% acetic anhydride (1)
348 K
398 K
REBOILER
Bottoms product ()
1% of acetone in feed
+ acetic acid
+ acetic anhydride
398 K](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F62b35b8f-7267-4957-84e7-4c1604f8937c%2Fd5f614d8-75b0-4278-a585-ba56bfa2c928%2Fmo7f9f7_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Question 2.
A mixture that contains 46 wt% acetone (CH.COCH:), 27% acetic acid (CH.COOH), and 27% acetic
anhydride [(CH3CO)20] is distilled at P= 1 atm. The feed enters the distillation column at T = 348 K
at a rate of 15000 kg/h. The distillate (overhead product) is essentially pure acetone, and the bottoms
product contains 1% of the acetone in the feed. The vapor effluent from the top of the column enters a
condenser at 329K and emerges as a liquid at 303 K. Half of the condensate is withdrawn as the
overhead product, and the remainder is refluxed back to the column. The liquid leaving the bottom of
the column goes into a steam-heated reboiler, in which it is partially vaporized. The vapor leaving the
reboiker is retumed to the column at a temperature of 398 K, and the residual liquid, also at 398 K,
constitutes the bottoms product.
(a) Calculate the mass flow rates and compositions of the product streams.
(b) Calculate the condenser cooling requirement Qc(k/h).
c) Use an overall encrgy balance to determine the reboiler heating requirement QrkJ/h).
(d) If the reboiler heat is provided by the condensation of saturated steam at 10 bar gauge, at what rate
must steam be fed?
Column overhead
Acetone (v), 329 K
CONDENSER
Distillate product
Acetone (), 303 K
Feed 15.000 kgh
DISTILLATION
COLUMN
46 wt% acetone (I
27 wt% acetic acid (1)
Vapor: 3.2 molek acetone, 73.8% acetic acid,
23.0% acetic anhydride
27 wi% acetic anhydride (1)
348 K
398 K
REBOILER
Bottoms product ()
1% of acetone in feed
+ acetic acid
+ acetic anhydride
398 K
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