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Photocatalytic degradation of several VOCs (n-hexane, n-butyl acetate and toluene) on TiO2 layer in a closed-loop reactor

Paper ID Volume ID Publish Year Pages File Format Full-Text
55041 47038 2013 6 PDF Available
Title
Photocatalytic degradation of several VOCs (n-hexane, n-butyl acetate and toluene) on TiO2 layer in a closed-loop reactor
Abstract

This paper deals with photocatalytic degradation of three VOCs differing in chemical structure (n-hexane, n-butyl acetate and toluene) in a closed-loop reactor. Degradation tests were performed on particulate layers prepared from TiO2 VLP7000 (Kronos). Concentration dependencies of VOCs were simulated and initial degradation rates calculated. Dependence of the latter on initial concentrations confirms single-site Langmuir–Hinshelwood kinetics with value of hexane adsorption constant 0.023 m3 mmol−1. It was shown that butyl acetate is oxidized preferably to hexane when they react in a mixture, while their individual degradation seems to be kinetically similar. Toluene deactivates the photocatalyst and its degradation is thus very slow but the catalyst can be renewed by thermal treatment. The found selectivity or inhibitive ability of investigated VOCs in mixture is important for the proper choice of a suitable purification method of industrial exhaust fumes.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (206 K)Download as PowerPoint slideHighlights► Photocatalytic degradation of model VOCs on TiO2 layer carried out. ► Langmuir–Hinshelwood kinetics for hexane confirmed. ► Butyl acetate is oxidized preferably to hexane when reacting in mixture. ► Adsorbed aromatic intermediates (benzoates) of toluene degradation detected. ► TiO2 photocatalyst deactivated by benzoates can be renewed by thermal treatment.

Keywords
Photocatalysis; Gas-phase; n-Hexane; n-Butyl acetate; Toluene; Closed loop
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Photocatalytic degradation of several VOCs (n-hexane, n-butyl acetate and toluene) on TiO2 layer in a closed-loop reactor
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 209, 15 June 2013, Pages 153–158
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us