In a packed absorber, the solute mole fractions in the gas at the inlet and outlet are 0.01 and 0.005, respectively, under base case conditions. The incoming solvent has no solute content in it. The absorber has 30 transfer units and is operating isothermally. It is desired that the outlet mole fraction of the solute be reduced to 0.002 by changing the tower pressure. How much should the tower pressure be changed in comparison to the base case? Assume that the liquid and gas flowrates at the inlet remains unchanged, the tower continues to operate isothermally at the same temperature as the base case. Also assume that it is a dilute system.

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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In a packed absorber, the solute mole fractions in the gas at the inlet and outlet are

0.01 and 0.005, respectively, under base case conditions. The incoming solvent has

no solute content in it. The absorber has 30 transfer units and is operating

isothermally. It is desired that the outlet mole fraction of the solute be reduced to

0.002 by changing the tower pressure. How much should the tower pressure be

changed in comparison to the base case? Assume that the liquid and gas flowrates at

the inlet remains unchanged, the tower continues to operate isothermally at the same

temperature as the base case. Also assume that it is a dilute system.

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