Methanol is synthesized from carbon monoxide and hydrogen in a catalytic reactor. The fresh feed to the process contains 32.0 mole % CO, 64.0% H, and 4.0% N2. This stream is mixed with a reeycle stream in a ratio 5 mol recycle/l mol fresh feed to produce the feed to the reactor, which contains 13.0 mole% N2. A low single-pass conversion is attained in the reactor. The reactor effluent goes to a condenser from which two streams emerge: a liquid product stream containing all the methanol formed in the reactor, and a gas stream containing all the CO, H2, and N2 leaving the reactor. The gas stream is split into two fractions: one is purged from the process, and the other is the recycle stream that combines with the fresh feed to the reactor. For a methanol production rate of 100 kmol/hr, Calculate the molar flow rate and composition of the purge gas, and the overall and single-pass CO conversion. -Explain why we include recycling and purging streams in these processes. Fresh Feed stream n, (mol h) n (mol CH OHh reactor cond. 32 mol CO 64 mol H,/h 4 mol Nh 13 mol N, mol X, (mel N me) K, (mol CO/ mol) 1, (mol H,/h) (mol /h) K, mol N, imol) x (mol CO/ mol) 1-, tmol H,/hj) Purge
Methanol is synthesized from carbon monoxide and hydrogen in a catalytic reactor. The fresh feed to the process contains 32.0 mole % CO, 64.0% H, and 4.0% N2. This stream is mixed with a reeycle stream in a ratio 5 mol recycle/l mol fresh feed to produce the feed to the reactor, which contains 13.0 mole% N2. A low single-pass conversion is attained in the reactor. The reactor effluent goes to a condenser from which two streams emerge: a liquid product stream containing all the methanol formed in the reactor, and a gas stream containing all the CO, H2, and N2 leaving the reactor. The gas stream is split into two fractions: one is purged from the process, and the other is the recycle stream that combines with the fresh feed to the reactor. For a methanol production rate of 100 kmol/hr, Calculate the molar flow rate and composition of the purge gas, and the overall and single-pass CO conversion. -Explain why we include recycling and purging streams in these processes. Fresh Feed stream n, (mol h) n (mol CH OHh reactor cond. 32 mol CO 64 mol H,/h 4 mol Nh 13 mol N, mol X, (mel N me) K, (mol CO/ mol) 1, (mol H,/h) (mol /h) K, mol N, imol) x (mol CO/ mol) 1-, tmol H,/hj) Purge
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:Methanol is synthesized from carbon monoxide and hydrogen in a catalytic reactor. The fresh feed
to the process contains 32.0 mole % CO, 64.0% H, and 4.0% N2. This stream is mixed with a
reeycle stream in a ratio 5 mol recycle/l mol fresh feed to produce the feed to the reactor, which
contains 13.0 mole% N2. A low single-pass conversion is attained in the reactor. The reactor
effluent goes to a condenser from which two streams emerge: a liquid product stream containing
all the methanol formed in the reactor, and a gas stream containing all the CO, H2, and N2 leaving
the reactor. The gas stream is split into two fractions: one is purged from the process, and the other
is the recycle stream that combines with the fresh feed to the reactor. For a methanol production
rate of 100 kmol/hr, Calculate the molar flow rate and composition of the purge gas, and the
overall and single-pass CO conversion.
-Explain why we include recycling and purging streams in these processes.
Fresh Feed
stream
n, (mol h)
n (mol CH OHh
reactor
cond.
32 mol CO
64 mol H,/h
4 mol Nh
13 mol N, mol
X, (mel N me)
K, (mol CO/ mol)
1, (mol H,/h)
(mol /h)
K, mol N, imol)
x (mol CO/ mol)
1-, tmol H,/hj)
Purge
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