Modelling of fluidized bed reactors-II. Uniform catalyst temperature and concentration

Dragomir B. Bukur, Neal R. Amundson

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

A model based on the simple two phase theory of fluidization including the catalyst particles as a third phase has been developed for a nonisothermal fluidized bed catalytic reactor with continuous circulation of catalyst particles. The dilute phase is assumed to be in plug flow, the emulsion phase gas is considered to be perfectly mixed and the particles are assumed to be perfectly mixed and uniform. Exact criteria for uniqueness and multiplicity of the steady state solutions are presented and some conclusions derived therefrom. Several examples illustrating the influence of some parameters on the steady state multiplicity are reported. The steady states are analyzed for local asymptatic stability using Liapunov's direct method, but the sufficient conditions for stability are found to be rather conservative. Numerical examples illustrating the transient behavior of the system are presented, and it has been found that the initial temperature of the catalyst particles is a predominant factor in determining which steady state will be approached.

Original languageEnglish
Pages (from-to)847-858
Number of pages12
JournalChemical Engineering Science
Volume30
Issue number8
DOIs
Publication statusPublished - 1975
Externally publishedYes

Fingerprint

Fluidized Bed
Catalyst
Fluidized beds
Reactor
Catalysts
Modeling
Multiplicity
Fluidization
Emulsions
Temperature
Emulsion
Transient Behavior
Local Stability
Steady-state Solution
Gases
Direct Method
Uniqueness
Model-based
Numerical Examples
Sufficient Conditions

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering
  • Applied Mathematics

Cite this

Modelling of fluidized bed reactors-II. Uniform catalyst temperature and concentration. / Bukur, Dragomir B.; Amundson, Neal R.

In: Chemical Engineering Science, Vol. 30, No. 8, 1975, p. 847-858.

Research output: Contribution to journalArticle

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