Decomposition of ozone on Ag/SiO2 catalyst for abatement of waste gases emissions |
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| Authors: | A Naydenov P Konova Pen Nikolov F Klingstedt N Kumar D Kovacheva P Stefanov R Stoyanova D Mehandjiev |
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| Affiliation: | aInstitute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, “Acad. G. Bonchev” Street, Building 11, 1113 Sofia, Bulgaria;bLaboratory of Industrial Chemistry, Process Chemistry Centre, Åbo Akademi University, Biskopsgatan 8, 20500 Åbo/Turku, Finland |
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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. |
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| Keywords: | Ozone decomposition Ag/SiO2 Waste gases Silver oxide Silica |
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