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A wetted wall column of inside diameter (2 in) contains air and CO2 flowing at 3 ft/s. At a certain point in the column, the CO2 concentration in air is found to be 0.1 mol fraction. At the same point, the concentration of CO2 in the water at the water – air interface is estimated to be 0.005 mole fraction. The column operates at 10 atm and 25 °C. Considering a mass transfer through a stagnant layer (transfer of CO2 from air to water only), calculate the mass transfer coefficient and the mass flux at the point of interest, given that: The diffusivity of CO2 in air at 25 °C and 1 atm = 0.164 cm²/s The density of air at STP = 0.0808 lbm/ft³ The viscosity of air at 25 °C and 10 atm = 0.018×10-³ kg/m.s Hennery constant = 1640 atm / mol fraction the gas constant 0.082 atm.lit/mol.°K 0.833 Kčd = 0.023 DAB 0.333 Sh. No.= \PDAB- Im = 3.28 ft, 1ft = 12 in, 1 in= 2.54 cm, 1 kg= 2.2 Ibm

A wetted wall column of inside diameter (2 in) contains air and CO2 flowing at 3 ft/s. At a certain point in the column, the CO2 concentration in air is found to be 0.1 mol fraction. At the same point, the concentration of CO2 in the water at the water – air interface is estimated to be 0.005 mole fraction. The column operates at 10 atm and 25 °C. Considering a mass transfer through a stagnant layer (transfer of CO2 from air to water only), calculate the mass transfer coefficient and the mass flux at the point of interest, given that: The diffusivity of CO2 in air at 25 °C and 1 atm = 0.164 cm²/s The density of air at STP = 0.0808 lbm/ft³ The viscosity of air at 25 °C and 10 atm = 0.018×10-³ kg/m.s Hennery constant = 1640 atm / mol fraction the gas constant 0.082 atm.lit/mol.°K 0.833 Kčd = 0.023 DAB 0.333 Sh. No.= \PDAB- Im = 3.28 ft, 1ft = 12 in, 1 in= 2.54 cm, 1 kg= 2.2 Ibm

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
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Q3) A wetted wall column of inside diameter (2 in) contains air and CO2 flowing at 3 ft/s. At a certain point in the column, the CO2 concentration in air is found to be 0.1l mol fraction. At the same point, the concentration of CO2 in the water at the water – air - interface is estimated to be 0.005 mole fraction. The column operates at 10 atm and 25 °C. Considering a mass transfer through a stagnant layer (transfer of CO2 from air to water only), calculate the mass transfer coefficient and the mass flux at the point of interest, given that: The diffusivity of CO2 in air at 25 °C and 1 atm = 0.164 cm²/s The density of air at STP = 0.0808 lbm/ft³ The viscosity of air at 25 °C and 10 atm = 0.018×10³ kg/m.s Hennery constant = 1640 atm / mol fraction the gas constant 0.082 atm.lit/mol.°K 0.833 K̟d Sh. No.= DAB 0.333 (pduy 0.023 pDaB- Im = 3.28 ft, 1ft= 12 in, 1 in= 2.54 cm, 1 kg=2.2 Ibm
Transcribed Image Text:Q3) A wetted wall column of inside diameter (2 in) contains air and CO2 flowing at 3 ft/s. At a certain point in the column, the CO2 concentration in air is found to be 0.1l mol fraction. At the same point, the concentration of CO2 in the water at the water – air - interface is estimated to be 0.005 mole fraction. The column operates at 10 atm and 25 °C. Considering a mass transfer through a stagnant layer (transfer of CO2 from air to water only), calculate the mass transfer coefficient and the mass flux at the point of interest, given that: The diffusivity of CO2 in air at 25 °C and 1 atm = 0.164 cm²/s The density of air at STP = 0.0808 lbm/ft³ The viscosity of air at 25 °C and 10 atm = 0.018×10³ kg/m.s Hennery constant = 1640 atm / mol fraction the gas constant 0.082 atm.lit/mol.°K 0.833 K̟d Sh. No.= DAB 0.333 (pduy 0.023 pDaB- Im = 3.28 ft, 1ft= 12 in, 1 in= 2.54 cm, 1 kg=2.2 Ibm
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