An equilibrium stage tower running at ambient conditions is to be used to remove SO₂ from an air mixture by absorption with pure water. The flow rate of the inlet gas mixture is 1.38 lbmol/min. The inlet mole fraction of SO₂ is 5.5x10-4 and 90 % removal is required. The equilibrium relationship is ye = 33xs. a. Calculate the minimum flow rate of pure water. b. Determine the number of ideal stages that are needed if the water flow rate is 1.5 times the minimum by using the Kremser equation and the McCabe-Thiele graphical method.

Introduction to Chemical Engineering Thermodynamics
8th Edition
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Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
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An equilibrium stage tower running at ambient conditions is to be used to remove SO₂ from an air mixture by
absorption with pure water. The flow rate of the inlet gas mixture is 1.38 lbmol/min. The inlet mole fraction of
SO₂ is 5.5x10-4 and 90% removal is required. The equilibrium relationship is y₁ = 33x5.
a. Calculate the minimum flow rate of pure water.
b. Determine the number of ideal stages that are needed if the water flow rate is 1.5 times the minimum by
using the Kremser equation and the McCabe-Thiele graphical method.
Transcribed Image Text:An equilibrium stage tower running at ambient conditions is to be used to remove SO₂ from an air mixture by absorption with pure water. The flow rate of the inlet gas mixture is 1.38 lbmol/min. The inlet mole fraction of SO₂ is 5.5x10-4 and 90% removal is required. The equilibrium relationship is y₁ = 33x5. a. Calculate the minimum flow rate of pure water. b. Determine the number of ideal stages that are needed if the water flow rate is 1.5 times the minimum by using the Kremser equation and the McCabe-Thiele graphical method.
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