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Photocatalytic degradation of some VOCs in the gas phase using an annular flow reactor: Determination of the contribution of mass transfer and chemical reaction steps in the photodegradation process

Paper ID Volume ID Publish Year Pages File Format Full-Text
28679 44085 2006 6 PDF Available
Title
Photocatalytic degradation of some VOCs in the gas phase using an annular flow reactor: Determination of the contribution of mass transfer and chemical reaction steps in the photodegradation process
Abstract

The photodegradation of some VOCs in an annular reactor is chemical step controlled. The limitation due to mass transfer is negligible. The use of a combined plug-flow model shows that the apparent rate constant (k*) is equal to kK representing the Langmuir–Hinshelwood rate constants. So the design of an annular reactor using the L–H model can be considered. The photodegradability of the tested VOCs is strongly dependent on the product kK. Trichloroethylene is the best degraded while toluene is the worst. The study of the mineralization rate, defined as the ultimate degradation phase of the compounds, shows that this last is firstly dependent on the contact time and not on the nature of the VOC. Moreover increasing the inlet VOC concentration leads to a decrease in the mineralization rate.

Keywords
Photocatalysis; Langmuir–Hinshelwood; Annular reactor; VOCs
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Photocatalytic degradation of some VOCs in the gas phase using an annular flow reactor: Determination of the contribution of mass transfer and chemical reaction steps in the photodegradation process
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 177, Issues 2–3, 25 January 2006, Pages 212–217
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
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