Modeling of a multiannular photocatalytic reactor for perchloroethylene degradation in air

The full modeling and simulation of a multiannular photocatalytic reactor requires a thorough physical analysis of all the concurrent phenomena determinant of its performance: momentum and mass transfer in the homogeneous, nonuniform, fluid phases; radiation transfer in the fluid phases and across t...

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Bibliographic Details
Published in:AIChE journal 2006-05, Vol.52 (5), p.1814-1823
Main Authors: Imoberdorf, Gustavo E., Cassano, Alberto E., Alfano, Orlando M., Irazoqui, Horacio A.
Format: Article
Language:English
Subjects:
Absorption
Air pollution
air pollution remediation
Applied sciences
Atmospheric pollution
Catalysis
Catalytic reactions
Chemical engineering
Chemistry
Exact sciences and technology
General and physical chemistry
Heat and mass transfer. Packings, plates
multiannular photoreactor
photocatalysis
Pollution
Reactors
tetrachloroethylene
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
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Summary:The full modeling and simulation of a multiannular photocatalytic reactor requires a thorough physical analysis of all the concurrent phenomena determinant of its performance: momentum and mass transfer in the homogeneous, nonuniform, fluid phases; radiation transfer in the fluid phases and across the flow physical boundaries; and heterogeneous photocatalytic reaction kinetics. In a previous work, an expression of the intrinsic kinetics for the degradation of perchloroethylene (PCE) based on a plausible reaction mechanism was proposed and experimentally validated. In this work, this expression is used in the physical modeling and mathematical simulation of a multiannular, bench‐scale reactor. The reactor shows good effectiveness for the PCE degradation in polluted moist air. A radiation field model was developed to predict the local superficial rate of photon absorption (LSRPA) at each point on the reactor catalytic walls, which is needed to evaluate the local reaction rate. A 2‐D mass balance was developed taking into account the intrinsic kinetics, as well as mass‐transfer rate processes and the LSRPA calculated with the radiation field model equations. Predicted conversions show good agreement with experimental results with a root mean square error < 5.6%. © 2006 American Institute of Chemical Engineers AIChE J, 2006
ISSN:0001-1541
1547-5905
DOI:10.1002/aic.10771