Q3: Toluene (C>Hg) reacts with H2 to form benzene (C6H6 desired product), but a side reaction occurs in which diphenyl (C12 H10, undesired product), is formed. C,Hg H2 - CH, + CH4 2C,Hg H2 - C12H10 + 2CH4 CHENG 111- Introduction to Chemical Engineering 2021-22 Sem 2 The process is shown in the figure below. Hydrogen is added to the gas recycle stream to make the ratio of H2 to CH4 1 to 1 before the gas enters the mixer. The ratio of H2 to toluene entering the reactor at G is 4 H2 to 1 toluene. The single- pass conversion of toluene is 88%, and the yield of benzene is 0.80. Based on 100 moles of toluene entering the reactor, calculate the following: a) molar composition of the reactor effluent using the extent of reaction approach. b) amount of gas recycle stream. c) molar composition of the purge stream. d) selectivity. e) overall conversion of toluene. f) Which reaction is predominating? Is it the main reaction or the side reaction? Why? Makeup M 100%H, Gas Recycle Re P Purge YH2 1 H2: 1CH, w YCH, CH, H2 G Reactor Separator B Mixer 100% C,H n, mol C, H, nz mol H, n, mol CH, n, mol C,H, ng mol C, H10 1C,H: 4 H2: 4CH, 100% C,H D Liquid Recycle RL 100% C2H10 100% C,H
Q3: Toluene (C>Hg) reacts with H2 to form benzene (C6H6 desired product), but a side reaction occurs in which diphenyl (C12 H10, undesired product), is formed. C,Hg H2 - CH, + CH4 2C,Hg H2 - C12H10 + 2CH4 CHENG 111- Introduction to Chemical Engineering 2021-22 Sem 2 The process is shown in the figure below. Hydrogen is added to the gas recycle stream to make the ratio of H2 to CH4 1 to 1 before the gas enters the mixer. The ratio of H2 to toluene entering the reactor at G is 4 H2 to 1 toluene. The single- pass conversion of toluene is 88%, and the yield of benzene is 0.80. Based on 100 moles of toluene entering the reactor, calculate the following: a) molar composition of the reactor effluent using the extent of reaction approach. b) amount of gas recycle stream. c) molar composition of the purge stream. d) selectivity. e) overall conversion of toluene. f) Which reaction is predominating? Is it the main reaction or the side reaction? Why? Makeup M 100%H, Gas Recycle Re P Purge YH2 1 H2: 1CH, w YCH, CH, H2 G Reactor Separator B Mixer 100% C,H n, mol C, H, nz mol H, n, mol CH, n, mol C,H, ng mol C, H10 1C,H: 4 H2: 4CH, 100% C,H D Liquid Recycle RL 100% C2H10 100% C,H
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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Please answer question 3b
Transcribed Image Text:Q3: Toluene (C>Hg) reacts with H2 to form benzene (C6H6 desired product), but a side
reaction occurs in which diphenyl (C12 H10, undesired product), is formed.
C,Hg
H2 -
CH, + CH4
2C,Hg
H2 -
C12H10 +
2CH4
CHENG 111- Introduction to Chemical Engineering
2021-22 Sem 2
The process is shown in the figure below. Hydrogen is added to the gas recycle stream
to make the ratio of H2 to CH4 1 to 1 before the gas enters the mixer. The ratio of H2
to toluene entering the reactor at G is 4 H2 to 1 toluene. The single- pass conversion
of toluene is 88%, and the yield of benzene is 0.80.
Based on 100 moles of toluene entering the reactor, calculate the following:
a) molar composition of the reactor effluent using the extent of reaction approach.
b) amount of gas recycle stream.
c) molar composition of the purge stream.
d) selectivity.
e) overall conversion of toluene.
f) Which reaction is predominating? Is it the main reaction or the side reaction?
Why?
Makeup
M
100%H,
Gas Recycle Re
P Purge
YH2
1 H2: 1CH,
w
YCH,
CH,
H2
G
Reactor
Separator
B
Mixer
100% C,H
n, mol C, H,
nz mol H,
n, mol CH,
n, mol C,H,
ng mol C, H10
1C,H: 4 H2: 4CH,
100% C,H
D
Liquid Recycle RL
100% C2H10
100% C,H
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