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Catalytic oxidation of chlorophenol over V2O5/TiO2 catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
48392 46505 2008 9 PDF Available
Title
Catalytic oxidation of chlorophenol over V2O5/TiO2 catalysts
Abstract

Catalytic and in situ Fourier Transform Infrared (FTIR) spectroscopic studies were conducted to investigate the adsorption and oxidation of o- and p-chlorophenol over a 3.6 wt.% V2O5/TiO2 catalyst. At a space velocity of approximately 53,000 cm3 g−1 h−1, this catalyst was found to be active for the oxidation of o- and p-chlorophenol at temperatures as low as 200 °C, yielding CO2 and HCl as the main products. Trace amounts of higher molecular weight products were also detected at the reactor outlet indicating the operation of additional condensation, coupling and chlorination/dechlorination side reactions in parallel to the main complete oxidation scheme. The in situ FTIR studies revealed that different phenols adsorb on the V2O5/TiO2 catalyst through their hydroxyl group. Furthermore, the formation of similar surface species (i.e., maleates, acetates, formates and an aldehyde-type species) was observed. The results were compared with those of previous studies on the oxidation of m-dichlorobenzene (m-DCB) and benzene and suggest that a similar reaction mechanism is operating in all cases, although the relative kinetic significance of the different steps varies with the presence and the position of the hydroxyl and chlorine groups on the aromatic ring.

Keywords
Catalytic oxidation; Chlorinated aromatics; Chlorophenol; Catalytic vanadium oxide; FTIR
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Catalytic oxidation of chlorophenol over V2O5/TiO2 catalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 77, Issues 3–4, 10 January 2008, Pages 255–263
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
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Any Questions? feel free to contact us