Journal
CATALYSTS
Volume 12, Issue 4, Pages -Publisher
MDPI
DOI: 10.3390/catal12040448
Keywords
ozone decomposition; Pd-based catalyst; TiO2 hybrid support
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Funding
- European Union (ERDF)
- Region Nouvelle Aquitaine
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In this study, the decomposition of ozone in the air using Pd-based catalysts supported on a hybrid TiO2 was investigated. The method showed promising catalytic activity and catalyst stability, making it an effective treatment for air in closed environments like aircraft or spacecraft.
In aircraft and spacecraft, outside air is not directly fed to the passenger because it contains ozone at elevated altitudes. The decomposition of low concentration ozone in the air was carried out at 25 degrees C by catalytic oxidation on Pd-based catalysts supported on a high surface area hybrid TiO2. The use of these hybrid catalysts has shown a beneficial effect, both on the catalytic activity and on the catalyst stability. Kinetic studies showed that the most promising catalytic phase (Pd/TiO2_100) was the one obtained from the TiO2 support containing the lowest content of citrate ligands and leading to small Pd particles (around 4 nm). The effect of catalyst synthesis on the decomposition of O-3 gas (15 ppm) in a dry and humid (HR = 10%) stream in a closed environment such as aircraft or spacecraft was also investigated in this study and further elucidated by detailed characterizations. It was shown that the system could be used as an effective treatment for air coming from outside.
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