Title page for ETD etd-08252010-112157


Document Type Master's Dissertation
Author Saayman, Jean
URN etd-08252010-112157
Document Title Bubbling to turbulent regime transition in a 2D catalytic fluidized bed reactor
Degree MEng
Department Chemical Engineering
Supervisor
Advisor Name Title
Prof W Nicol Supervisor
Keywords
  • reactor models
  • two-dimensional fluidized beds
  • ozone decomposition reaction.
  • bubbling-turbulent
Date 2010-04-23
Availability unrestricted
Abstract

The ozone decomposition reaction was performed in a 2.5cmx40cmx450cm two dimensional (2D) catalytic fluidized bed reactor. Commercial FCC catalyst impregnated with Fe2O3 was used at superficial gas velocities ranging between 0.006 m/s and 0.55 m/s. The onset velocity of the turbulent regime (uc) was determined as 0.4 m/s. The catalyst activity was optimized so that the effect of inter-phase mass transfer could be accentuated in the conversion reading. It was found that the general bubbling-turbulent model of Thompson et. al. (1999) combined with the mass transfer correlations of Kunii and Levenspiel (1991), Foka et. al. (1996) and Miyauchi et. al. (1980)gave reasonable predictions of the experimental data. The gradual improvement of reactor performance with an increase in superficial velocity (as predicted by the Thompson et. al. model) was not observed; instead a discontinuity of the reactor performance was noted in the vicinity of uc. More experimental work is required to substantiate this observation.

Copyright 2009, University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria.

Please cite as follows:

Saayman, J 2009, Bubbling to turbulent regime transition in a 2D catalytic fluidized bed reactor, MEng dissertation, University of Pretoria, Pretoria, viewed yymmdd < http://upetd.up.ac.za/thesis/available/etd-08252010-112157/ >

E10/462/gm

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