Decomposition of ozone on Ag/SiO2 catalyst for abatement of waste gases emissions

A. Naydenov; P. Konova; Pen. Nikolov; F. Klingstedt; N. Kumar; D. Kovacheva; P. Stefanov; R. Stoyanova; D. Mehandjiev

doi:10.1016/j.cattod.2007.11.020

Decomposition of ozone on Ag/SiO₂ catalyst for abatement of waste gases emissions

A. Naydenov^*, P. Konova, Pen. Nikolov, F. Klingstedt, N. Kumar, D. Kovacheva, P. Stefanov, R. Stoyanova, D. Mehandjiev

^*Corresponding author for this work

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

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Abstract

A silica-supported Ag system made by the incipient wetness impregnation method was investigated in the reaction of heterogeneous catalytic decomposition of ozone. It was established that the catalytic ozone decomposition on Ag/SiO₂ proceeded in the temperature interval -40 °C to 25 °C as a first order reaction with activation energy of 65 kJ/mol (pre-exponential factor 5.0 × 10¹⁴ s^-1). Based on the results from the instrumental methods (SEM, XRD, XPS, EPR, TPD) it can be concluded that in presence of ozone the silver is oxidized to a complicated mixture of Ag₂O₃ and AgO. Due to the high activity and stability of the Ag/SiO₂ catalyst, it is promising for neutralization of waste gases containing ozone.

Original language	English
Pages (from-to)	471-474
Number of pages	4
Journal	Catalysis Today
Volume	137
Issue number	2-4
DOIs	https://doi.org/10.1016/j.cattod.2007.11.020
Publication status	Published - 30 Sept 2008
MoE publication type	A1 Journal article-refereed

Keywords

Ag/SiO
Ozone decomposition
Silica
Silver oxide
Waste gases

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title = "Decomposition of ozone on Ag/SiO2 catalyst for abatement of waste gases emissions",

abstract = "A silica-supported Ag system made by the incipient wetness impregnation method was investigated in the reaction of heterogeneous catalytic decomposition of ozone. It was established that the catalytic ozone decomposition on Ag/SiO2 proceeded in the temperature interval -40 °C to 25 °C as a first order reaction with activation energy of 65 kJ/mol (pre-exponential factor 5.0 × 1014 s-1). Based on the results from the instrumental methods (SEM, XRD, XPS, EPR, TPD) it can be concluded that in presence of ozone the silver is oxidized to a complicated mixture of Ag2O3 and AgO. Due to the high activity and stability of the Ag/SiO2 catalyst, it is promising for neutralization of waste gases containing ozone.",

keywords = "Ag/SiO, Ozone decomposition, Silica, Silver oxide, Waste gases",

author = "A. Naydenov and P. Konova and Pen. Nikolov and F. Klingstedt and N. Kumar and D. Kovacheva and P. Stefanov and R. Stoyanova and D. Mehandjiev",

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T1 - Decomposition of ozone on Ag/SiO2 catalyst for abatement of waste gases emissions

AU - Naydenov, A.

AU - Konova, P.

AU - Nikolov, Pen.

AU - Klingstedt, F.

AU - Kumar, N.

AU - Kovacheva, D.

AU - Stefanov, P.

AU - Stoyanova, R.

AU - Mehandjiev, D.

PY - 2008/9/30

Y1 - 2008/9/30

N2 - A silica-supported Ag system made by the incipient wetness impregnation method was investigated in the reaction of heterogeneous catalytic decomposition of ozone. It was established that the catalytic ozone decomposition on Ag/SiO2 proceeded in the temperature interval -40 °C to 25 °C as a first order reaction with activation energy of 65 kJ/mol (pre-exponential factor 5.0 × 1014 s-1). Based on the results from the instrumental methods (SEM, XRD, XPS, EPR, TPD) it can be concluded that in presence of ozone the silver is oxidized to a complicated mixture of Ag2O3 and AgO. Due to the high activity and stability of the Ag/SiO2 catalyst, it is promising for neutralization of waste gases containing ozone.

AB - A silica-supported Ag system made by the incipient wetness impregnation method was investigated in the reaction of heterogeneous catalytic decomposition of ozone. It was established that the catalytic ozone decomposition on Ag/SiO2 proceeded in the temperature interval -40 °C to 25 °C as a first order reaction with activation energy of 65 kJ/mol (pre-exponential factor 5.0 × 1014 s-1). Based on the results from the instrumental methods (SEM, XRD, XPS, EPR, TPD) it can be concluded that in presence of ozone the silver is oxidized to a complicated mixture of Ag2O3 and AgO. Due to the high activity and stability of the Ag/SiO2 catalyst, it is promising for neutralization of waste gases containing ozone.

KW - Ag/SiO

KW - Ozone decomposition

KW - Silica

KW - Silver oxide

KW - Waste gases

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JO - Catalysis Today

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Decomposition of ozone on Ag/SiO₂ catalyst for abatement of waste gases emissions

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Keywords

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