Answered: A gas phase catalytic reaction is…

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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Question

A gas phase catalytic reaction is performed in a fluidized bed operating at a superficial gas velocity of 0.3 m/s. For this reaction under these conditions it is known that the reaction is first order in reactant A. The following information is given: W bed height at incipient fluidization = 1.5 m; • operating mean bed height = 1.65m; voidage at incipient fluidization = 0.47; • reaction rate constant = 75.47 (per unit volume of solids); Umf = 0.033 m/s; • mean bubble rise velocity = 0.111 m/s; mass transfer coefficient between bubbles and emulsion 0.1009 (based on unit bubble volume) minimum fluidization velocity = 0.033 m/s. Use the reactor model of Orcutt et al. to determine: (a) the conversion of reactant A; (b) the effect on the conversion found in (a) of reducing the inventory of catalyst by one half; (c) the effect on the conversion found in (a) of halving the bubble size (assuming the interphase mass transfer coefficient is inversely proportional to the square root of the bubble diameter).

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