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3) We wish to strip a dilute amount of hydrogen sulfide from water using air. The system is operated warm and at lower pressure to increase the removal of hydrogen sulfide. The stripper is at 45 °C and 0.98 atm. The inlet liquid mole fraction is 7.00E-6 hydrogen sulfide. Inlet liquid flow rate is 100 kg moles/hr. We desire to remove 98% of the hydrogen sulfide. The inlet gas has y=0.00. Inlet gas flow rate is 0.20 kg moles/hr. You can assume that total liquid and gas flow rates are constant. Equilibrium data is: Partial pressure of hydrogen sulfide (atm) = 745 x And x is the mole fraction of hydrogen sulfide in water. (Perry, 7th ed., p.2- 127) a. In this concentration range, how do the mole fractions x and y compare to mole ratios X and Y? How does this simplify the problem? b. Calculate the outlet gas and liquid mole fractions of hydrogen sulfide. c. Calculate the number of equilibrium stages required using a McCabe- Thiele diagram d. If L/V=Mx (L/V)max, find the multiplier M (M<1). e. Why would this column be difficult to operate?

3) We wish to strip a dilute amount of hydrogen sulfide from water using air. The system is operated warm and at lower pressure to increase the removal of hydrogen sulfide. The stripper is at 45 °C and 0.98 atm. The inlet liquid mole fraction is 7.00E-6 hydrogen sulfide. Inlet liquid flow rate is 100 kg moles/hr. We desire to remove 98% of the hydrogen sulfide. The inlet gas has y=0.00. Inlet gas flow rate is 0.20 kg moles/hr. You can assume that total liquid and gas flow rates are constant. Equilibrium data is: Partial pressure of hydrogen sulfide (atm) = 745 x And x is the mole fraction of hydrogen sulfide in water. (Perry, 7th ed., p.2- 127) a. In this concentration range, how do the mole fractions x and y compare to mole ratios X and Y? How does this simplify the problem? b. Calculate the outlet gas and liquid mole fractions of hydrogen sulfide. c. Calculate the number of equilibrium stages required using a McCabe- Thiele diagram d. If L/V=Mx (L/V)max, find the multiplier M (M<1). e. Why would this column be difficult to operate?

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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need help with part c and d 

3) We wish to strip a dilute amount of hydrogen sulfide from water using air. The system is operated warm and at lower pressure to increase the removal of hydrogen sulfide. The stripper is at 45 °C and 0.98 atm. The inlet liquid mole fraction is 7.00E-6 hydrogen sulfide. Inlet liquid flow rate is 100 kg moles/hr. We desire to remove 98% of the hydrogen sulfide. The inlet gas has y=0.00. Inlet gas flow rate is 0.20 kg moles/hr. You can assume that total liquid and gas flow rates are constant. Equilibrium data is: Partial pressure of hydrogen sulfide (atm) = 745 x And x is the mole fraction of hydrogen sulfide in water. (Perry, 7th ed., p.2- 127) a. In this concentration range, how do the mole fractions x and y compare to mole ratios X and Y? How does this simplify the problem? b. Calculate the outlet gas and liquid mole fractions of hydrogen sulfide. c. Calculate the number of equilibrium stages required using a McCabe- Thiele diagram d. If L/V = M x (L/V)max, find the multiplier M (M<1). e. Why would this column be difficult to operate?
Transcribed Image Text:3) We wish to strip a dilute amount of hydrogen sulfide from water using air. The system is operated warm and at lower pressure to increase the removal of hydrogen sulfide. The stripper is at 45 °C and 0.98 atm. The inlet liquid mole fraction is 7.00E-6 hydrogen sulfide. Inlet liquid flow rate is 100 kg moles/hr. We desire to remove 98% of the hydrogen sulfide. The inlet gas has y=0.00. Inlet gas flow rate is 0.20 kg moles/hr. You can assume that total liquid and gas flow rates are constant. Equilibrium data is: Partial pressure of hydrogen sulfide (atm) = 745 x And x is the mole fraction of hydrogen sulfide in water. (Perry, 7th ed., p.2- 127) a. In this concentration range, how do the mole fractions x and y compare to mole ratios X and Y? How does this simplify the problem? b. Calculate the outlet gas and liquid mole fractions of hydrogen sulfide. c. Calculate the number of equilibrium stages required using a McCabe- Thiele diagram d. If L/V = M x (L/V)max, find the multiplier M (M<1). e. Why would this column be difficult to operate?
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