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

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Abstrakti

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.

Alkuperäiskieli	Englanti
Sivut	471-474
Sivumäärä	4
Julkaisu	Catalysis Today
Vuosikerta	137
Numero	2-4
DOI - pysyväislinkit	https://doi.org/10.1016/j.cattod.2007.11.020
Tila	Julkaistu - 30 syysk. 2008
OKM-julkaisutyyppi	A1 Julkaistu artikkeli, soviteltu

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@article{18b9fc55f59f467483f8586a28ba9363,

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",

year = "2008",

month = sep,

day = "30",

doi = "10.1016/j.cattod.2007.11.020",

language = "English",

volume = "137",

pages = "471--474",

journal = "Catalysis Today",

issn = "0920-5861",

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number = "2-4",

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TY - JOUR

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

UR - http://www.scopus.com/inward/record.url?scp=48049103694&partnerID=8YFLogxK

U2 - 10.1016/j.cattod.2007.11.020

DO - 10.1016/j.cattod.2007.11.020

M3 - Article

AN - SCOPUS:48049103694

SN - 0920-5861

VL - 137

SP - 471

EP - 474

JO - Catalysis Today

JF - Catalysis Today

IS - 2-4