Normal butane is to be isomerised to isobutane in a PFR. For this example, the reaction is elementary and not reversible. The “new” specific reaction rate constant of 10 h-1 was re-measured at 380 K after an employees data was found to be erroneous. The feed for this reactor will enter at 330 K and will use an existing reactor of 6m3. It will process 200kmol/hr of a mixture of 40% butane and 60% N2. Find initial reaction rate. Additional information: Hrxn = -9000 J/mol butane (ie. Exothermic), Activation energy 50 kJ/mol Concentration butane0 =15 kmol/m3 CPbutane = 141 J/mol.K, CPi-butane = 151 J/mol.K, CP N2 = 29.14 J/mol.K

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
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Normal butane is to be isomerised to isobutane in a PFR. For this example, the reaction is elementary and not reversible. The “new” specific reaction rate constant of 10 h-1 was re-measured at 380 K after an employees data was found to be erroneous. The feed for this reactor will enter at 330 K and will use an existing reactor of 6m3. It will process 200kmol/hr of a mixture of 40% butane and 60% N2.

Find initial reaction rate.

Additional information:

Hrxn = -9000 J/mol butane (ie. Exothermic), Activation energy 50 kJ/mol
Concentration butane0 =15 kmol/m3
CPbutane = 141 J/mol.K, CPi-butane = 151 J/mol.K, CP N2 = 29.14 J/mol.K 

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