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Prediction of axial concentration profiles in catalytic fluidized reactors
Author(s) -
van der Vaart D. R.
Publication year - 1992
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690380803
Subject(s) - ozone , chemistry , fluidized bed , decomposition , gas composition , analytical chemistry (journal) , thermodynamics , mechanics , chromatography , organic chemistry , physics
A previous study by Fryer and Potter (1976) of the catalytic decomposition of ozone in a bubbling fluidized‐bed reactor is considered in the light of a recently developed reactor model. It is shown that since in‐bed sampling leads to an averaged concentration that is biased toward the emulsion‐phase gas composition, an increase in the ozone concentration in the sampled gas is predicted as the probe is raised above the bubbling bed. The analysis, which does not have to assume gas backmixing, shows that the minima in the ozone concentration profiles associated with this transition occurs between H mf and H, the expanded bed height, and may even occur at lower points in the bed at higher excess fluidizing velocities. The model also correctly predicts the overall conversion of ozone as a function of the reaction rate constant and gas velocity without resorting to the fitting of any parameters.