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The irreversible catalytic gas phase reaction A B₂ is carried out over a catalyst of which the composition is totally unknown. It was found that the order of reaction for product A is around 0.7 and that the addition of B lowers the reaction rate (at the same partial pressure, or concentration of A). At constant temperature, the following empirical relation was derived for a differentially operated test reactor: C₁PA (1+C₂PA+ C3√PB₂) a) Propose a possible reaction mechanism for this reaction, and include details of each reaction step. At increased reaction temperature, the reaction is 1st order in A and the addition of B does not have an influence on the reaction rate anymore. b) Explain this behaviour.

The irreversible catalytic gas phase reaction A B₂ is carried out over a catalyst of which the composition is totally unknown. It was found that the order of reaction for product A is around 0.7 and that the addition of B lowers the reaction rate (at the same partial pressure, or concentration of A). At constant temperature, the following empirical relation was derived for a differentially operated test reactor: C₁PA (1+C₂PA+ C3√PB₂) a) Propose a possible reaction mechanism for this reaction, and include details of each reaction step. At increased reaction temperature, the reaction is 1st order in A and the addition of B does not have an influence on the reaction rate anymore. b) Explain this behaviour.

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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The irreversible catalytic gas phase reaction A → B₂ is carried out over a catalyst of which the composition is totally unknown. It was found that the order of reaction for product A is around 0.7 and that the addition of Blowers the reaction rate (at the same partial pressure, or concentration of A). At constant temperature, the following empirical relation was derived for a differentially operated test reactor: -TA C₂PA (1 + C₂ PA + C₂₂√PB₂) a) Propose a possible reaction mechanism for this reaction, and include details of each reaction step. At increased reaction temperature, the reaction is 1st order in A and the addition of B does not have an influence on the reaction rate anymore. b) Explain this behaviour.
Transcribed Image Text:The irreversible catalytic gas phase reaction A → B₂ is carried out over a catalyst of which the composition is totally unknown. It was found that the order of reaction for product A is around 0.7 and that the addition of Blowers the reaction rate (at the same partial pressure, or concentration of A). At constant temperature, the following empirical relation was derived for a differentially operated test reactor: -TA C₂PA (1 + C₂ PA + C₂₂√PB₂) a) Propose a possible reaction mechanism for this reaction, and include details of each reaction step. At increased reaction temperature, the reaction is 1st order in A and the addition of B does not have an influence on the reaction rate anymore. b) Explain this behaviour.
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