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We want to design and build a reactor that produces 1200 kmol acetaldehyde (CH3CHO) per hour from ethanol and air. Two reactions are important at the reactor conditions: (R1) produces our desired product while (R2) produces an acetic acid by product. C2H5OH + ½ O2→ CH3CHO + H2O (R1) 2CH3CHO + O2→ 2CH3COOH (R2) Laboratory data indicate that if we use a new catalyst, adjust the feed ratio to 5.7 moles ethanol per mole oxygen, and operate the reactor at 300 °C and 1.5 atm pressure, we can expect 25% conversion of ethanol in the reactor, with selectivity for acetaldehyde 0.6. The preliminary block flow diagram calls for mixing pure ethanol vapor and air at 300 °C and 1.5 atm and feeding the mixture to the reactor. The reactor effluent is also 1.5 atm and all vapor. To maintain a constant reactor temperature of 300 °C, will heat need to be added or removed? If so, state how much.

We want to design and build a reactor that produces 1200 kmol acetaldehyde (CH3CHO) per hour from ethanol and air. Two reactions are important at the reactor conditions: (R1) produces our desired product while (R2) produces an acetic acid by product. C2H5OH + ½ O2→ CH3CHO + H2O (R1) 2CH3CHO + O2→ 2CH3COOH (R2) Laboratory data indicate that if we use a new catalyst, adjust the feed ratio to 5.7 moles ethanol per mole oxygen, and operate the reactor at 300 °C and 1.5 atm pressure, we can expect 25% conversion of ethanol in the reactor, with selectivity for acetaldehyde 0.6. The preliminary block flow diagram calls for mixing pure ethanol vapor and air at 300 °C and 1.5 atm and feeding the mixture to the reactor. The reactor effluent is also 1.5 atm and all vapor. To maintain a constant reactor temperature of 300 °C, will heat need to be added or removed? If so, state how much.

Introduction to Chemical Engineering Thermodynamics
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
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We want to design and build a reactor that produces 1200 kmol acetaldehyde (CH3CHO) per hour from ethanol and air. Two reactions are important at the reactor conditions: (R1) produces our desired product while (R2) produces an acetic acid by product. C2H5OH + ½ O2→ CH3CHO + H2O (R1) 2CH3CHO + O2→ 2CH3COOH (R2) Laboratory data indicate that if we use a new catalyst, adjust the feed ratio to 5.7 moles ethanol per mole oxygen, and operate the reactor at 300 °C and 1.5 atm pressure, we can expect 25% conversion of ethanol in the reactor, with selectivity for acetaldehyde 0.6. The preliminary block flow diagram calls for mixing pure ethanol vapor and air at 300 °C and 1.5 atm and feeding the mixture to the reactor. The reactor effluent is also 1.5 atm and all vapor. To maintain a constant reactor temperature of 300 °C, will heat need to be added or removed? If so, state how much.
Transcribed Image Text:We want to design and build a reactor that produces 1200 kmol acetaldehyde (CH3CHO) per hour from ethanol and air. Two reactions are important at the reactor conditions: (R1) produces our desired product while (R2) produces an acetic acid by product. C2H5OH + ½ O2→ CH3CHO + H2O (R1) 2CH3CHO + O2→ 2CH3COOH (R2) Laboratory data indicate that if we use a new catalyst, adjust the feed ratio to 5.7 moles ethanol per mole oxygen, and operate the reactor at 300 °C and 1.5 atm pressure, we can expect 25% conversion of ethanol in the reactor, with selectivity for acetaldehyde 0.6. The preliminary block flow diagram calls for mixing pure ethanol vapor and air at 300 °C and 1.5 atm and feeding the mixture to the reactor. The reactor effluent is also 1.5 atm and all vapor. To maintain a constant reactor temperature of 300 °C, will heat need to be added or removed? If so, state how much.
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