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A certain catalyst undergoes sintering over time, causing its catalytic activity to decrease according to the following deactivation kinetic model:

A certain catalyst undergoes sintering over time, causing its catalytic activity to decrease according to the following deactivation kinetic model:

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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A certain catalyst undergoes sintering over time, causing its catalytic activity to decrease according to the following deactivation kinetic model: da rd kaa³ dt The deactivation constant (ka, day-¹) follows an Arrhenius-type temperature-dependency as shown: -1,200 ka = 88.9e T The catalyst is to be replaced when its activity falls to 99% below its original activity. If the reactor is operated at T = 500 K, how long should this catalyst be used? =
Transcribed Image Text:A certain catalyst undergoes sintering over time, causing its catalytic activity to decrease according to the following deactivation kinetic model: da rd kaa³ dt The deactivation constant (ka, day-¹) follows an Arrhenius-type temperature-dependency as shown: -1,200 ka = 88.9e T The catalyst is to be replaced when its activity falls to 99% below its original activity. If the reactor is operated at T = 500 K, how long should this catalyst be used? =
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