Journal
CATALYSIS COMMUNICATIONS
Volume 148, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.catcom.2020.106163
Keywords
Ozone conversion; NOx poisoning; PdO catalyst; Air treatment; Adsorption
Categories
Funding
- BPI France
- European Union (ERDF)
- Region Nouvelle Aquitaine
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The catalytic decomposition of ozone using Pd/Al2O3 catalysts at 40 degrees C showed that the presence of NOx can significantly poison the catalyst, leading to a decrease in ozone conversion rate over time. However, it was found that the poisoning effect is reversible when using NOx-free ozone feed, allowing for total recovery of the initial catalyst properties.
The catalytic decomposition of ozone was carried out at 40 degrees C with a Pd/Al2O3 catalyst, in the presence or absence of nitrogen oxides traces. NOx were produced during the generation of ozone from air. Two set-ups were used to examine the possible effects of NOx poisoning, one fixed bed with a powder catalyst, and another using a monolith coated with the same catalyst. NOx were shown to significantly poison the catalyst, resulting in a decrease of ozone conversion over time on stream. NOx-free ozone feed can lead to the total recovery of the initial catalyst properties indicating a reversible poisoning.
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