A spiral-wound, honporous is used to separate a gas containing H2, CH4, and C,Hg. The permeate is 95 mol% pure H, and contains no ethane. The relative split ratio (separation factor, SP) for H2 relative to methane is 47. Using the fol- lowing data and an infinite surroundings temperature of 80°F, compute the: (a) irreversible production of entropy in Btu/h-R; (b) lost work in Btu/h; and (c) minimum work of separation in Btu/h. Why is it neg- ative? What other method(s) might be used to make the separation? Stream flow rates and properties: ose acetate membrane separator Feed flow rates, Ibmol/h H2 3,000 CH, 884 C,H6 120
A spiral-wound, honporous is used to separate a gas containing H2, CH4, and C,Hg. The permeate is 95 mol% pure H, and contains no ethane. The relative split ratio (separation factor, SP) for H2 relative to methane is 47. Using the fol- lowing data and an infinite surroundings temperature of 80°F, compute the: (a) irreversible production of entropy in Btu/h-R; (b) lost work in Btu/h; and (c) minimum work of separation in Btu/h. Why is it neg- ative? What other method(s) might be used to make the separation? Stream flow rates and properties: ose acetate membrane separator Feed flow rates, Ibmol/h H2 3,000 CH, 884 C,H6 120
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:A spiral-wound, nonporous cellulose acetate membrane separator
is used to separate a gas containing H2, CH4, and C¿Hg. The permeate
is 95 mol% pure H2 and contains no ethane. The relative split ratio
(separation factor, SP) for H2 relative to methane is 47. Using the fol-
lowing data and an infinite surroundings temperature of 80°F, compute
the: (a) irreversible production of entropy in Btu/h-R; (b) lost work in
Btu/h; and (c) minimum work of separation in Btu/h. Why is it neg-
ative? What other method(s) might be used to make the separation?
Stream flow rates and properties:
Feed flow rates, Ibmol/h
H2
CH,
CH6
3,000
884
120
Feed
Permeate
Retentate
Phase condition
Vapor
Vapor
Vapor
Temperature, °F
80
80
80
Pressure, psia
365
50
365
Enthalpy, Btu/lbmol
8,550
8,380
8,890
Entropy, Btu/lbmol-K
1.520
4.222
2.742
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