Acidic gases, such as CO₂ and H₂S, must be removed from natural gas prior to use. You want to remove the H₂S from a feed gas that is 1% mol H₂S and the rest CH4. In a single stage the feed gas, with 100 mol/minute of CH4, will be passed through water. Assume that water will not go into the gas, and that CH4 will not go into the water. The solubility of H₂S in water can be described by Henry's Law, see the attached Figure. How much water (in L/min) do you need so that the feed gas exits with 0.15% mol H₂S at 25 °C and pressure of 68 atm? 1/H₂, (1/atm) 4 2 10-1 8 6 4 2 10-² 8 6 4 10-3 8 4 2 10-4 8 6 4 2 10-5- 0 C1₂ CO 0₂ CHA I 10 20 1 30 NH3 C₂H6 H₂ SO₂ H₂S C₂H4 CO₂ N₂1 40 50 60 70 Temperature, C Cl₂ 80 Br₂ H₂S 90 100
Acidic gases, such as CO₂ and H₂S, must be removed from natural gas prior to use. You want to remove the H₂S from a feed gas that is 1% mol H₂S and the rest CH4. In a single stage the feed gas, with 100 mol/minute of CH4, will be passed through water. Assume that water will not go into the gas, and that CH4 will not go into the water. The solubility of H₂S in water can be described by Henry's Law, see the attached Figure. How much water (in L/min) do you need so that the feed gas exits with 0.15% mol H₂S at 25 °C and pressure of 68 atm? 1/H₂, (1/atm) 4 2 10-1 8 6 4 2 10-² 8 6 4 10-3 8 4 2 10-4 8 6 4 2 10-5- 0 C1₂ CO 0₂ CHA I 10 20 1 30 NH3 C₂H6 H₂ SO₂ H₂S C₂H4 CO₂ N₂1 40 50 60 70 Temperature, C Cl₂ 80 Br₂ H₂S 90 100
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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Chemical Engineering, Separations
Transcribed Image Text:Acidic gases, such as CO2 and H₂S, must be removed from natural gas prior to use.
You want to remove the H₂S from a feed gas that is 1% mol H₂S and the rest CH4. In a single
stage the feed gas, with 100 mol/minute of CH4, will be passed through water. Assume that water
will not go into the gas, and that CH4 will not go into the water. The solubility of H₂S in water
can be described by Henry's Law, see the attached Figure. How much water (in L/min) do you
need so that the feed gas exits with 0.15% mol H₂S at 25 °C and pressure of 68 atm?
1/H, (1/atm)
2
10-1
8
6
2
10-2
8
6
4
10-3
8
6
4
2
10-4
8
6
4
2
10-5
0
Cl₂
СО
0₂
CHA
1
10 20
1
30
NH3
C₂H6
H₂
SO₂
H₂S
C₂H4
CO₂
IN₂ 1
40 50 60
Temperature, °C
70 80
Br₂
H₂S
90
100
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