Structured catalytic reactors for ozone abatement in more electrical aircrafts

SSCI-VIDE+CARE+VMLInternational audienceIn aircrafts, outside air is not directly fed to passengers, because it contains high ozone concentration at elevated altitudes. Catalytic converters are thus necessary to lower ozone concentration to authorized values. Such equipments already exist but have to evolve to take into account the energetic constraints of more electrical aircrafts. Concretely, ozone reduction has to be performed efficiently at temperatures lower than 100°C, so that the ozone concentration of fresh air entering the aircraft cabin does not exceed 100 ppb (for 3 hours) and 250 ppb instantly.To improve the ozone converter efficiency, different solutions car arise from catalyst and/or reactor optimisation, keeping in mind that the pressure drop must be kept very low.In this study, a focus was made on the reactor configuration, using a single commercial catalyst coated on different structures in order to find the best trade off between pressure drop and mass transfer efficiency