Opposite effect of gas phase H2O2 on photocatalytic oxidation of acetone and benzene vapors

A. V. Vorontsov

doi:10.1016/j.catcom.2007.04.027

Opposite effect of gas phase H₂O₂ on photocatalytic oxidation of acetone and benzene vapors

A. V. Vorontsov

Research output: Contribution to journal › Article › peer-review

14 Scopus citations

Abstract

The effect of additions of gas phase H₂O₂ was measured for gas phase photocatalytic oxidation of organic vapors. Photocatalytic oxidation of benzene vapor over TiO₂ in a flow reactor resulted in a quick catalyst deactivation. Additions of gas phase H₂O₂ into the reactor feed provided enhanced and sustained oxidation of benzene vapor. The increase of inlet H₂O₂ vapor concentration from 0 to about 1000 ppm led to the one order of magnitude growth of benzene vapor complete oxidation rate. The highest rate of 1.1 nmol/s was observed at C₆H₆ concentration 124 ppm and H₂O₂ concentration 1000 ppm. In the case of acetone vapor photocatalytic oxidation, the rate of complete oxidation in the flow reactor decreased with an increase of gas phase H₂O₂ inlet concentration. TiO₂ Degussa P25 provided higher oxidation rate in the presence of H₂O₂ than pure anatase TiO₂.

Original language	English
Pages (from-to)	2100-2104
Number of pages	5
Journal	Catalysis Communications
Volume	8
Issue number	12
DOIs	https://doi.org/10.1016/j.catcom.2007.04.027
State	Published - Dec 2007
Externally published	Yes

Keywords

Aromatic compounds
Deactivation
Hydrogen peroxide
Photocatalysis
Reactivation
Rutile
Surface peroxocomplex
Titanium dioxide

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10.1016/j.catcom.2007.04.027

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title = "Opposite effect of gas phase H2O2 on photocatalytic oxidation of acetone and benzene vapors",

abstract = "The effect of additions of gas phase H2O2 was measured for gas phase photocatalytic oxidation of organic vapors. Photocatalytic oxidation of benzene vapor over TiO2 in a flow reactor resulted in a quick catalyst deactivation. Additions of gas phase H2O2 into the reactor feed provided enhanced and sustained oxidation of benzene vapor. The increase of inlet H2O2 vapor concentration from 0 to about 1000 ppm led to the one order of magnitude growth of benzene vapor complete oxidation rate. The highest rate of 1.1 nmol/s was observed at C6H6 concentration 124 ppm and H2O2 concentration 1000 ppm. In the case of acetone vapor photocatalytic oxidation, the rate of complete oxidation in the flow reactor decreased with an increase of gas phase H2O2 inlet concentration. TiO2 Degussa P25 provided higher oxidation rate in the presence of H2O2 than pure anatase TiO2.",

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AB - The effect of additions of gas phase H2O2 was measured for gas phase photocatalytic oxidation of organic vapors. Photocatalytic oxidation of benzene vapor over TiO2 in a flow reactor resulted in a quick catalyst deactivation. Additions of gas phase H2O2 into the reactor feed provided enhanced and sustained oxidation of benzene vapor. The increase of inlet H2O2 vapor concentration from 0 to about 1000 ppm led to the one order of magnitude growth of benzene vapor complete oxidation rate. The highest rate of 1.1 nmol/s was observed at C6H6 concentration 124 ppm and H2O2 concentration 1000 ppm. In the case of acetone vapor photocatalytic oxidation, the rate of complete oxidation in the flow reactor decreased with an increase of gas phase H2O2 inlet concentration. TiO2 Degussa P25 provided higher oxidation rate in the presence of H2O2 than pure anatase TiO2.

KW - Aromatic compounds

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KW - Hydrogen peroxide

KW - Photocatalysis

KW - Reactivation

KW - Rutile

KW - Surface peroxocomplex

KW - Titanium dioxide

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Opposite effect of gas phase H₂O₂ on photocatalytic oxidation of acetone and benzene vapors

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Keywords

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