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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 C6H5CH3 + H₂C6H6 + CH4 C6H3 (CH3)3 + H₂C6H4(CH3)2 + CH4 In addition, an unwanted side reaction occurs, in which benzene dimerizes to form diphenyl [C6H5C6H5] Feed ?B ?T ?X ?P E2 C6H4(CH3)2 + H₂C6H5CH3 + CH4 2 C6H6C6H5C6H₂ + H₂ A process stream containing 5 mol % benzene [CH], 20 mol % toluene [C6H5 CH3], 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). BTXP Reactor Hydrogen Gas ? H₂ Light Gases ? H₂ ?M Condenser Aromatics ?B ?T ? X BTXPD ?P ?D | b. For a basis of 100 moles of Aromatics, the component balance for toluene can be written: 12.3 ?F- &₁&₂ What must be the value of the question mark?

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 C6H5CH3 + H₂C6H6 + CH4 C6H3 (CH3)3 + H₂C6H4(CH3)2 + CH4 In addition, an unwanted side reaction occurs, in which benzene dimerizes to form diphenyl [C6H5C6H5] Feed ?B ?T ?X ?P E2 C6H4(CH3)2 + H₂C6H5CH3 + CH4 2 C6H6C6H5C6H₂ + H₂ A process stream containing 5 mol % benzene [CH], 20 mol % toluene [C6H5 CH3], 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). BTXP Reactor Hydrogen Gas ? H₂ Light Gases ? H₂ ?M Condenser Aromatics ?B ?T ? X BTXPD ?P ?D | b. For a basis of 100 moles of Aromatics, the component balance for toluene can be written: 12.3 ?F- &₁&₂ What must be the value of the question mark?

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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: C6H₂CH3 + H₂C6H6 + CH4 C6H4(CH3)2 + H2CH₂CH3 + CH4 E3 C6H₂(CH3)3 + H₂C6H4(CH3)2 + CH4 In addition, an unwanted side reaction occurs, in which benzene dimerizes to form diphenyl [C6H5C6H5] E4 2 C6H6 C6H5C6H5 + H₂ A process stream containing 5 mol% benzene [CH], 20 mol% toluene [C6H5CH3], 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 ?B ?T ? X ?? ?P Reactor Hydrogen Gas ? H₂ Light Gases ? H₂ ?M Condenser Aromatics ?B ~~~.. BTXPD ?T ?X ?P ?D 1 b. For a basis of 100 moles of Aromatics, the component balance for toluene can be written: 12.3 = ? F- &₁ + E₂ What must be the value of the question mark?
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: C6H₂CH3 + H₂C6H6 + CH4 C6H4(CH3)2 + H2CH₂CH3 + CH4 E3 C6H₂(CH3)3 + H₂C6H4(CH3)2 + CH4 In addition, an unwanted side reaction occurs, in which benzene dimerizes to form diphenyl [C6H5C6H5] E4 2 C6H6 C6H5C6H5 + H₂ A process stream containing 5 mol% benzene [CH], 20 mol% toluene [C6H5CH3], 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 ?B ?T ? X ?? ?P Reactor Hydrogen Gas ? H₂ Light Gases ? H₂ ?M Condenser Aromatics ?B ~~~.. BTXPD ?T ?X ?P ?D 1 b. For a basis of 100 moles of Aromatics, the component balance for toluene can be written: 12.3 = ? F- &₁ + E₂ What must be the value of the question mark?
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