D6.* Design a stripping column to remove carbon dioxide from water by heating the water and passing it countercurrently to a nitrogen stream in a staged stripper. Operation is isothermal and isobaric at 60.0°C and 1.0 atm pressure. Feed water contains 9.2 x 10-6 mole fraction CO₂ and flows at 100,000 lb/h. Entering nitrogen is pure and flows at 2500.0 ft³/h. Nitrogen is at 1.0 atm and 60.0°C. Outlet water concentration is 2.0 × 10−7 mole fraction CO₂. Ignore nitrogen solubility in water, and ignore water volatility. Equilibrium data are in Table 12-1. Use a Murphree vapor efficiency of 40.0%. Find the outlet vapor composition and the number of real stages needed.
D6.* Design a stripping column to remove carbon dioxide from water by heating the water and passing it countercurrently to a nitrogen stream in a staged stripper. Operation is isothermal and isobaric at 60.0°C and 1.0 atm pressure. Feed water contains 9.2 x 10-6 mole fraction CO₂ and flows at 100,000 lb/h. Entering nitrogen is pure and flows at 2500.0 ft³/h. Nitrogen is at 1.0 atm and 60.0°C. Outlet water concentration is 2.0 × 10−7 mole fraction CO₂. Ignore nitrogen solubility in water, and ignore water volatility. Equilibrium data are in Table 12-1. Use a Murphree vapor efficiency of 40.0%. Find the outlet vapor composition and the number of real stages needed.
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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Transcribed Image Text:TABLE 12-1. Henry's law constants H for Eq. (12-3) for CO2, CO, and
H₂S in water. H is in atm/mole fraction.
T°C
0
LO
5
10
15
20
25
30
35
40
45
50
60
70
80
90
100
CO₂
728
876
1040
1220
1420
1640
1860
2090
2330
2570
2830
3410
CO
35,200
39,600
44,200
48,900
53,600
58,000
62,000
65,900
69,600
72,900
76,100
82,100
84,500
84,500
84,600
84,600
H₂S
268
315
367
423
483
545
609
676
745
814
884
1030
1190
1350
1440
1480
Transcribed Image Text:D6.* Design a stripping column to remove carbon dioxide from
water by heating the water and passing it countercurrently to a
nitrogen stream in a staged stripper. Operation is isothermal and
isobaric at 60.0°C and 1.0 atm pressure. Feed water contains 9.2
x 10-6 mole fraction CO₂ and flows at 100,000 lb/h. Entering
nitrogen is pure and flows at 2500.0 ft³/h. Nitrogen is at 1.0
atm and 60.0°C. Outlet water concentration is 2.0 × 10-7 mole
fraction CO₂. Ignore nitrogen solubility in water, and ignore
water volatility. Equilibrium data are in Table 12-1. Use a
Murphree vapor efficiency of 40.0%. Find the outlet vapor
composition and the number of real stages needed.
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