An effluent gas from a food processing industry with a flow rate of 1000 mol/h is to be processed. It contains 10mol% SO2 and the remaining balance of an inert gas. Due to environmental restriction, the industry should absorb the SO2 in the original effluent with 92% of absorption efficiency before emission to the environment. For this task, pure water is employed as a solvent since SO2 is highly soluble in water. The equilibrium data is given hereunder in molar ratio. The operating line is a straight line and is represented by X (104 )014681012 Y (103 )08.836.355.575.496117.5 Determine:The amount of solute and inert gas in feedThe inlet and outlet concentration of solute in mole ratio in the gas phaseThe inlet and outlet concentration of solute in mole ratio in the liquid phaseTheoretical number of stages requiredIn this case or generally in absorption, the operating line lays above the equilibrium curve/line whereas in distillation and stripping the reverse is true. Why?

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Answered: In this case or generally in…

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

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An effluent gas from a food processing industry with a flow rate of 1000 mol/h is to be processed. It contains 10mol% SO₂ and the remaining balance of an inert gas. Due to environmental restriction, the industry should absorb the SO₂ in the original effluent with 92% of absorption efficiency before emission to the environment. For this task, pure water is employed as a solvent since SO₂ is highly soluble in water. The equilibrium data is given hereunder in molar ratio. The operating line is a straight line and is represented by

X (10⁴)	0	1	4	6	8	10	12
Y (10³)	0	8.8	36.3	55.5	75.4	96	117.5

Determine:

The amount of solute and inert gas in feed
The inlet and outlet concentration of solute in mole ratio

in the gas phase

The inlet and outlet concentration of solute in mole ratio

in the liquid phase

Theoretical number of stages required
In this case or generally in absorption, the operating line lays above the equilibrium curve/line whereas in distillation and stripping the reverse is true. Why?

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Step 1: Calculate Concentration of the liquid and vapor phase

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