Hydrodealkylation is a process in which side chain alkyl groups (like methyl) are removed from aromatics by reaction with hydrogen. The following reactions take place in the reactor: CH₂CH₂ + H₂¹C6H6+ CH4 CH₂(CH3)3 + H₂CH(CH3)2 + CH In addition, an unwanted side reaction occurs, in which benzene dimerizes to form diphenyl [C6H5C6H5] 2 C6H6C6H5C6H5 + H₂ A process stream containing 5 mol% benzene [CH], 20 mol % toluene [CH₂CH3], 35 mol% xylene [C6H4 (CH3)₂], and 40 mol% pseudocumene [C6H3 (CH3)3] is fed to a hydrodealkylation plant. This process stream is mixed with hydrogen gas in 5:1 gas-aromatics ratio before being fed to the reactor. A condenser separates hydrogen and methane from the other reactor products (lumped as aromatics). Feed E2 C6H4(CH3)2 + H₂C6H₂CH3 + CH4 ?B ?T ? X ?P Reactor Hydrogen Gas ? H₂ Light Gases ? H₂ ?M Condenser Aromatics ?B ?T ?X ?P ?D c. For a basis of 100 moles of Aromatics, the component balance for benzene can be written: ? = 0.05F + ₁ - 2&4 What must be the value of the red question mark in moles?
Hydrodealkylation is a process in which side chain alkyl groups (like methyl) are removed from aromatics by reaction with hydrogen. The following reactions take place in the reactor: CH₂CH₂ + H₂¹C6H6+ CH4 CH₂(CH3)3 + H₂CH(CH3)2 + CH In addition, an unwanted side reaction occurs, in which benzene dimerizes to form diphenyl [C6H5C6H5] 2 C6H6C6H5C6H5 + H₂ A process stream containing 5 mol% benzene [CH], 20 mol % toluene [CH₂CH3], 35 mol% xylene [C6H4 (CH3)₂], and 40 mol% pseudocumene [C6H3 (CH3)3] is fed to a hydrodealkylation plant. This process stream is mixed with hydrogen gas in 5:1 gas-aromatics ratio before being fed to the reactor. A condenser separates hydrogen and methane from the other reactor products (lumped as aromatics). Feed E2 C6H4(CH3)2 + H₂C6H₂CH3 + CH4 ?B ?T ? X ?P Reactor Hydrogen Gas ? H₂ Light Gases ? H₂ ?M Condenser Aromatics ?B ?T ?X ?P ?D c. For a basis of 100 moles of Aromatics, the component balance for benzene can be written: ? = 0.05F + ₁ - 2&4 What must be the value of the red question mark in moles?
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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Question
![Hydrodealkylation is a process in which side chain alkyl groups (like methyl) are removed from aromatics
by reaction with hydrogen. The following reactions take place in the reactor:
E1
C6H₂CH3 + H₂C6H6 + CH4
C6H4(CH3)2 + H₂C6H5CH3 + CH4
C6H3 (CH3)3 + H₂C6H4(CH3)2 + CH4
In addition, an unwanted side reaction occurs, in which benzene dimerizes to form diphenyl [C6H5C6H5]
E4
2 C6H6C6H5C6H5 + H₂
A process stream containing 5 mol % benzene [C6H6], 20 mol% toluene [C6H₂CH3], 35 mol% xylene
[C6H4(CH3)2], and 40 mol % pseudocumene [C6H3 (CH3)3] is fed to a hydrodealkylation plant. This
process stream is mixed with hydrogen gas in 5:1 gas-aromatics ratio before being fed to the reactor. A
condenser separates hydrogen and methane from the other reactor products (lumped as aromatics).
Feed
2.2.2.
?B
BTXP
?T
? X
?P
Reactor
Hydrogen Gas
? H₂
Light Gases
? H₂
?M
Condenser
Aromatics
2.2.2.
BTXP
?B
?T
? X
?P
?D
c. For a basis of 100 moles of Aromatics, the component balance for benzene can be written: ? =
0.05F + ₁ - 2&4 What must be the value of the red question mark in moles?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F5ff4366d-f480-4033-8974-fec3a73e3a4f%2F6518b6b0-1189-43e6-875e-6e1f6c648599%2Fjn472zf_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Hydrodealkylation is a process in which side chain alkyl groups (like methyl) are removed from aromatics
by reaction with hydrogen. The following reactions take place in the reactor:
E1
C6H₂CH3 + H₂C6H6 + CH4
C6H4(CH3)2 + H₂C6H5CH3 + CH4
C6H3 (CH3)3 + H₂C6H4(CH3)2 + CH4
In addition, an unwanted side reaction occurs, in which benzene dimerizes to form diphenyl [C6H5C6H5]
E4
2 C6H6C6H5C6H5 + H₂
A process stream containing 5 mol % benzene [C6H6], 20 mol% toluene [C6H₂CH3], 35 mol% xylene
[C6H4(CH3)2], and 40 mol % pseudocumene [C6H3 (CH3)3] is fed to a hydrodealkylation plant. This
process stream is mixed with hydrogen gas in 5:1 gas-aromatics ratio before being fed to the reactor. A
condenser separates hydrogen and methane from the other reactor products (lumped as aromatics).
Feed
2.2.2.
?B
BTXP
?T
? X
?P
Reactor
Hydrogen Gas
? H₂
Light Gases
? H₂
?M
Condenser
Aromatics
2.2.2.
BTXP
?B
?T
? X
?P
?D
c. For a basis of 100 moles of Aromatics, the component balance for benzene can be written: ? =
0.05F + ₁ - 2&4 What must be the value of the red question mark in moles?
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