Ozone Decomposition over Cobalt Supported on Olive Stones Activated Carbon: Effect of Preparation Method on Catalyst Activity

Aqueous ozone decomposition was studied over highly dispersed cobalt nanoparticles supported on olive stones activated carbon (AC) prepared by: wetness impregnation (Co/AC w ) and incipient wetness impregnation (Co/AC iw ) with respect to pore volume. Nitrogen adsorption-desorption at 77K, SEM, XRD...

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Bibliographic Details
Published in:Ozone: science & engineering 2017-11, Vol.39 (6), p.435-446
Main Authors: Abdedayem, Asma, Guiza, Monia, Rivas Toledo, Francisco Javier, Ouederni, Abdelmottaleb
Format: Article
Language:English
Subjects:
Activated Carbon
Butanol
Catalysis
Catalysts
Catalytic activity
Cobalt
Cobalt Catalyst
Decomposition
Dispersion
Impregnation
Impregnation Method Kinetic Study
Moisture content
Nanoparticles
Ozone
Ozone Decomposition
Tert-butanol
X ray photoelectron spectroscopy
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Summary:Aqueous ozone decomposition was studied over highly dispersed cobalt nanoparticles supported on olive stones activated carbon (AC) prepared by: wetness impregnation (Co/AC w ) and incipient wetness impregnation (Co/AC iw ) with respect to pore volume. Nitrogen adsorption-desorption at 77K, SEM, XRD and XPS analyses were used to characterize the catalysts. Analyses results show that Co/AC w was more uniformly dispersed on the AC than Co/AC iw . The effect of the presence of tert-butanol as radical scavenger was also studied. Higher catalytic activity was measured for Co/AC w than Co/AC iw . Ozone decomposition extent goes to 99% in only 3 min in the presence of Co/AC w compared to 60% and 58% using Co/AC iw catalyst and AC, respectively.
ISSN:0191-9512
1547-6545
DOI:10.1080/01919512.2017.1331729