Ozone Control in High - Flying

To conserve fuel whenever practicable, and to limit cost increases resulzing from world-wide increases in oil prices, passenger aircraft are now flying at higher altitudes than previously. This frequently takes them into the ozone-containing layer of the atmosphere, and when this is drawn into aircraft by air conditioning systems it may cause physical discomfort and irritation to aircrews and passengers. Catalytic decomposition, using a metal supported platinum catalyst, provides an economic practical solution in this problem by reducing to an acceptable level the amount of ozone entering the aircra.ft cabins.