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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 CP 40 cal/mol.K B -36 kcal/mol 40 cal/mol.K C -32 kcal/mol 40 cal/mol K 1. If you have interstage heat exchange between series reactors to decrease the temperature back to 300 K, calculate the number of 60 L CSTRs needed to obtain a conversion of at least 70%. What are the conversion and temperature leaving each reactor? 2. Repeat Problem 3 for the case where you have 60 L PFRs in series with interstage heat exchange. Plot XA, Xe, and T for each reactor. 3. If you have a series of PFRs with enough volume to reach 99.9% of the equilibrium conversion in each reactor, how many reactors would be required to obtain a conversion of 90%? What are the conversion and temperature leaving each reactor?

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 CP 40 cal/mol.K B -36 kcal/mol 40 cal/mol.K C -32 kcal/mol 40 cal/mol K 1. If you have interstage heat exchange between series reactors to decrease the temperature back to 300 K, calculate the number of 60 L CSTRs needed to obtain a conversion of at least 70%. What are the conversion and temperature leaving each reactor? 2. Repeat Problem 3 for the case where you have 60 L PFRs in series with interstage heat exchange. Plot XA, Xe, and T for each reactor. 3. If you have a series of PFRs with enough volume to reach 99.9% of the equilibrium conversion in each reactor, how many reactors would be required to obtain a conversion of 90%? What are the conversion and temperature leaving each reactor?

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
Problem 1.1P
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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 CP 40 cal/mol.K B -36 kcal/mol 40 cal/mol.K C -32 kcal/mol 40 cal/mol K 1. If you have interstage heat exchange between series reactors to decrease the temperature back to 300 K, calculate the number of 60 L CSTRs needed to obtain a conversion of at least 70%. What are the conversion and temperature leaving each reactor? 2. Repeat Problem 3 for the case where you have 60 L PFRs in series with interstage heat exchange. Plot XA, Xe, and T for each reactor. 3. If you have a series of PFRs with enough volume to reach 99.9% of the equilibrium conversion in each reactor, how many reactors would be required to obtain a conversion of 90%? What are the conversion and temperature leaving each reactor?
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 CP 40 cal/mol.K B -36 kcal/mol 40 cal/mol.K C -32 kcal/mol 40 cal/mol K 1. If you have interstage heat exchange between series reactors to decrease the temperature back to 300 K, calculate the number of 60 L CSTRs needed to obtain a conversion of at least 70%. What are the conversion and temperature leaving each reactor? 2. Repeat Problem 3 for the case where you have 60 L PFRs in series with interstage heat exchange. Plot XA, Xe, and T for each reactor. 3. If you have a series of PFRs with enough volume to reach 99.9% of the equilibrium conversion in each reactor, how many reactors would be required to obtain a conversion of 90%? What are the conversion and temperature leaving each reactor?
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