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Consider the reversible, exothermic, gas phase reaction 2AB+C in a flow reactor. Pure A enters at 300 K, and the maximum operating temperature is 600 K. FA0 = 8 mol/min, Kc = 50 at 320 K, KA = 0.2 L/mol min at 400 K, EA = 12,000 cal/mol, vo = 2 L/min. Pressure drop is negligible. Species A H (273 K) -18 kcal/mol Ср 40 cal/mol.K B -36 kcal/mol 40 cal/mol K C -32 kcal/mol 40 cal/mol K 1. Calculate the reactor volume and how much heat must be added (in kW) to get a conversion of 80% in a single (non-adiabatic) CSTR if U = 200 cal/min dm² K, A = 10 dm², T₁ = 300 K (assume essentially constant due to high heat transfer fluid flow). 2. Plot XA, Xe, T, and Ta down the length of a 100 L PFR with co-current heat exchange if Ua 25 cal/L min K, Tao 300 K, heat transfer fluid: mc = 25 mol/min and CP,C = 15 cal/mol.K. 3. Repeat Problem 2 for a PFR with counter-current heat exchange. 4. Compare conversion, outlet temperature, and shape of the curves in Problems 2 and 3. Discuss any differences.

Consider the reversible, exothermic, gas phase reaction 2AB+C in a flow reactor. Pure A enters at 300 K, and the maximum operating temperature is 600 K. FA0 = 8 mol/min, Kc = 50 at 320 K, KA = 0.2 L/mol min at 400 K, EA = 12,000 cal/mol, vo = 2 L/min. Pressure drop is negligible. Species A H (273 K) -18 kcal/mol Ср 40 cal/mol.K B -36 kcal/mol 40 cal/mol K C -32 kcal/mol 40 cal/mol K 1. Calculate the reactor volume and how much heat must be added (in kW) to get a conversion of 80% in a single (non-adiabatic) CSTR if U = 200 cal/min dm² K, A = 10 dm², T₁ = 300 K (assume essentially constant due to high heat transfer fluid flow). 2. Plot XA, Xe, T, and Ta down the length of a 100 L PFR with co-current heat exchange if Ua 25 cal/L min K, Tao 300 K, heat transfer fluid: mc = 25 mol/min and CP,C = 15 cal/mol.K. 3. Repeat Problem 2 for a PFR with counter-current heat exchange. 4. Compare conversion, outlet temperature, and shape of the curves in Problems 2 and 3. Discuss any differences.

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
Chapter1: Introduction
Section: Chapter Questions
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Consider the reversible, exothermic, gas phase reaction 2AB+C in a flow reactor. Pure A enters at 300 K, and the maximum operating temperature is 600 K. FA0 = 8 mol/min, Kc = 50 at 320 K, KA = 0.2 L/mol min at 400 K, EA = 12,000 cal/mol, vo = 2 L/min. Pressure drop is negligible. Species A H (273 K) -18 kcal/mol Ср 40 cal/mol.K B -36 kcal/mol 40 cal/mol K C -32 kcal/mol 40 cal/mol K 1. Calculate the reactor volume and how much heat must be added (in kW) to get a conversion of 80% in a single (non-adiabatic) CSTR if U = 200 cal/min dm² K, A = 10 dm², T₁ = 300 K (assume essentially constant due to high heat transfer fluid flow). 2. Plot XA, Xe, T, and Ta down the length of a 100 L PFR with co-current heat exchange if Ua 25 cal/L min K, Tao 300 K, heat transfer fluid: mc = 25 mol/min and CP,C = 15 cal/mol.K. 3. Repeat Problem 2 for a PFR with counter-current heat exchange. 4. Compare conversion, outlet temperature, and shape of the curves in Problems 2 and 3. Discuss any differences.
Transcribed Image Text:Consider the reversible, exothermic, gas phase reaction 2AB+C in a flow reactor. Pure A enters at 300 K, and the maximum operating temperature is 600 K. FA0 = 8 mol/min, Kc = 50 at 320 K, KA = 0.2 L/mol min at 400 K, EA = 12,000 cal/mol, vo = 2 L/min. Pressure drop is negligible. Species A H (273 K) -18 kcal/mol Ср 40 cal/mol.K B -36 kcal/mol 40 cal/mol K C -32 kcal/mol 40 cal/mol K 1. Calculate the reactor volume and how much heat must be added (in kW) to get a conversion of 80% in a single (non-adiabatic) CSTR if U = 200 cal/min dm² K, A = 10 dm², T₁ = 300 K (assume essentially constant due to high heat transfer fluid flow). 2. Plot XA, Xe, T, and Ta down the length of a 100 L PFR with co-current heat exchange if Ua 25 cal/L min K, Tao 300 K, heat transfer fluid: mc = 25 mol/min and CP,C = 15 cal/mol.K. 3. Repeat Problem 2 for a PFR with counter-current heat exchange. 4. Compare conversion, outlet temperature, and shape of the curves in Problems 2 and 3. Discuss any differences.
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