5) An absorption tower operating at 20 °C and 1 atm pressure was used to absorb SO2 from an air mixture into water. At one point in the absorber the partial pressure of SO2 in the gas stream was 30 mmHg and the concentration of the contacting liquid stream was 0.0344 lbmol SO₂/ft³ of solution. The individual film mass transfer coefficients for SO2 at 20°C and 1 atm are KL = 1.3 lbmol/[hr ft² lbmol/ft³ solution] and kG = 0.295 lbmol/hr ft² atm. Equilibrium data for SO2 are given in the table below. partial pressure SO2 (mmHg) 0.5 3.2 8.5 26 59 conc SO₂ (lbmol/ft³ soln) 0.0191 0.0911 0.1738 0.388 0.681 a) Evaluate the interfacial concentration (Cint) and pressure (pint) of SO₂. b) Find values for the individual film mass transfer coefficients (k), overall mass transfer coefficients (K), and driving forces given in the table below. Mass transfer coefficients KG KL KG KL Driving force Pbulk - Pint Cint-Cbulk Pbulk - p* C* - Cbulk p* is defined as the pressure corresponding to Cbulk, c* is the concentration corresponding to pbulk c) What percentage of the overall mass transfer resistance is in the gas film?
5) An absorption tower operating at 20 °C and 1 atm pressure was used to absorb SO2 from an air mixture into water. At one point in the absorber the partial pressure of SO2 in the gas stream was 30 mmHg and the concentration of the contacting liquid stream was 0.0344 lbmol SO₂/ft³ of solution. The individual film mass transfer coefficients for SO2 at 20°C and 1 atm are KL = 1.3 lbmol/[hr ft² lbmol/ft³ solution] and kG = 0.295 lbmol/hr ft² atm. Equilibrium data for SO2 are given in the table below. partial pressure SO2 (mmHg) 0.5 3.2 8.5 26 59 conc SO₂ (lbmol/ft³ soln) 0.0191 0.0911 0.1738 0.388 0.681 a) Evaluate the interfacial concentration (Cint) and pressure (pint) of SO₂. b) Find values for the individual film mass transfer coefficients (k), overall mass transfer coefficients (K), and driving forces given in the table below. Mass transfer coefficients KG KL KG KL Driving force Pbulk - Pint Cint-Cbulk Pbulk - p* C* - Cbulk p* is defined as the pressure corresponding to Cbulk, c* is the concentration corresponding to pbulk c) What percentage of the overall mass transfer resistance is in the gas film?
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
![5) An absorption tower operating at 20 °C and 1 atm pressure was used to
absorb SO2 from an air mixture into water. At one point in the absorber the
partial pressure of SO2 in the gas stream was 30 mmHg and the
concentration of the contacting liquid stream was 0.0344 lbmol SO₂/ft³ of
solution. The individual film mass transfer coefficients for SO2 at 20°C and 1
atm are KL = 1.3 lbmol/[hr ft² lbmol/ft³ solution] and kG = 0.295 lbmol/hr ft² atm.
Equilibrium data for SO2 are given in the table below.
partial pressure SO2 (mmHg)
0.5
3.2
8.5
26
59
conc SO₂ (lbmol/ft³ soln)
0.0191
0.0911
0.1738
0.388
0.681
a) Evaluate the interfacial concentration (Cint) and pressure (pint) of SO₂.
b) Find values for the individual film mass transfer coefficients (k), overall
mass transfer coefficients (K), and driving forces given in the table below.
Mass transfer coefficients
KG
KL
KG
KL
Driving force
Pbulk - Pint
Cint-Cbulk
Pbulk - p*
C* - Cbulk
p* is defined as the pressure corresponding to Cbulk, c* is the concentration
corresponding to pbulk
c) What percentage of the overall mass transfer resistance is in the gas film?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fc0ff916c-a9ca-4791-8d5c-b57cb6fa675f%2F2bcf06ba-44a1-4507-829a-bfebe5c24f03%2F7f7eb5_processed.png&w=3840&q=75)
Transcribed Image Text:5) An absorption tower operating at 20 °C and 1 atm pressure was used to
absorb SO2 from an air mixture into water. At one point in the absorber the
partial pressure of SO2 in the gas stream was 30 mmHg and the
concentration of the contacting liquid stream was 0.0344 lbmol SO₂/ft³ of
solution. The individual film mass transfer coefficients for SO2 at 20°C and 1
atm are KL = 1.3 lbmol/[hr ft² lbmol/ft³ solution] and kG = 0.295 lbmol/hr ft² atm.
Equilibrium data for SO2 are given in the table below.
partial pressure SO2 (mmHg)
0.5
3.2
8.5
26
59
conc SO₂ (lbmol/ft³ soln)
0.0191
0.0911
0.1738
0.388
0.681
a) Evaluate the interfacial concentration (Cint) and pressure (pint) of SO₂.
b) Find values for the individual film mass transfer coefficients (k), overall
mass transfer coefficients (K), and driving forces given in the table below.
Mass transfer coefficients
KG
KL
KG
KL
Driving force
Pbulk - Pint
Cint-Cbulk
Pbulk - p*
C* - Cbulk
p* is defined as the pressure corresponding to Cbulk, c* is the concentration
corresponding to pbulk
c) What percentage of the overall mass transfer resistance is in the gas film?
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