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Q1. Solute A is to be absorbed from a binary mixture containing 7.5% of A with solvent B in a packed tower. Based on flooding calculation, a tower diameter of 1.2 m is selected. Total gas flow rate is 60 kmol/h. The exit gas must not contain 0.2% of solute A. Solute free liquid B enters from the top of the tower at 40 kmol/h. The gas phase and liquid phase mass transfer coefficients based on mole ratio unit are: kx =2.05 kmol/m?h and ky =1.75 kmol/m?h. The equilibrium line Equation is Y=0.63X. Specific interfacial area of gas-liquid contact (a) is 71 m²/m³. (a) Calculate packing height required for the desired separation. (b) For 99.5% solute A removal, what % increase in packed height is needed? (c) Determine slopes of operating line in each case.

Q1. Solute A is to be absorbed from a binary mixture containing 7.5% of A with solvent B in a packed tower. Based on flooding calculation, a tower diameter of 1.2 m is selected. Total gas flow rate is 60 kmol/h. The exit gas must not contain 0.2% of solute A. Solute free liquid B enters from the top of the tower at 40 kmol/h. The gas phase and liquid phase mass transfer coefficients based on mole ratio unit are: kx =2.05 kmol/m?h and ky =1.75 kmol/m?h. The equilibrium line Equation is Y=0.63X. Specific interfacial area of gas-liquid contact (a) is 71 m²/m³. (a) Calculate packing height required for the desired separation. (b) For 99.5% solute A removal, what % increase in packed height is needed? (c) Determine slopes of operating line in each case.

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
Problem 1.1P
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Q1. Solute A is to be absorbed from a binary mixture containing 7.5% of A with solvent B in a packed tower. Based on flooding calculation, a tower diameter of 1.2 m is selected. Total gas flow rate is 60 kmol/h. The exit gas must not contain 0.2% of solute A. Solute free liquid B enters from the top of the tower at 40 kmol/h. The gas phase and liquid phase mass transfer coefficients based on mole ratio unit are: kx=2.05 kmol/m²h and ky =1.75 kmol/m²h. The equilibrium line Equation is Y=0.63X. Specific interfacial area of gas-liquid contact (a) is 71 m/m³. (a) Calculate packing height required for the desired separation. (b) For 99.5% solute A removal, what % increase in packed height is needed? (c) Determine slopes of operating line in each case.
Transcribed Image Text:Q1. Solute A is to be absorbed from a binary mixture containing 7.5% of A with solvent B in a packed tower. Based on flooding calculation, a tower diameter of 1.2 m is selected. Total gas flow rate is 60 kmol/h. The exit gas must not contain 0.2% of solute A. Solute free liquid B enters from the top of the tower at 40 kmol/h. The gas phase and liquid phase mass transfer coefficients based on mole ratio unit are: kx=2.05 kmol/m²h and ky =1.75 kmol/m²h. The equilibrium line Equation is Y=0.63X. Specific interfacial area of gas-liquid contact (a) is 71 m/m³. (a) Calculate packing height required for the desired separation. (b) For 99.5% solute A removal, what % increase in packed height is needed? (c) Determine slopes of operating line in each case.
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