An aircraft environmental control system includes a catalytic converter having ozone-destroying capability. A surface of the catalytic converter is anodized to form an anodized layer, and the metal oxide layer is washcoated to form a washcoat layer. An ozone destroying catalyst is impregnated in the anodized and washcoat layers. The catalyst may include one or more metals. For example, a bimetallic catalyst may include a precious metal and a transition metal.
CROSS REFERENCE TO RELATED APPLICATION
This is a divisional of U.S. Ser. No., 09/379,036 filed Aug. 23, 1999, now U.S. Pat. No. 6,576,199.
This application claims the benefit of provisional application no. 60/101,140 filed on Sep. 18, 1998.
The invention is concerned with a device of destroying ozone in gases by employing a recuperative plate heat exchanger (1) and an integrated electrical heating element (19, 21). The recuperative plate heat exchanger (1) is equipped with at least two planes, a preheating plane (11) and a recooling plane (13), whereby the flow direction of the gas treated in the recooling plane (13) is reversed relative to the ozone-containing gas in the preheating plane (11). Preferably, the flow directions of the preheating plane (11) and the recooling plane (13) cross over. The electrical heating element (19, 21) is situated in a reaction chamber (3) and heats up the ozone-containing gas preheated in the heat-exchanger up to temperatures of 350.degree. C. or more, and thus destroys the ozone within the gas almost to completion. The plate heat exchanger (1) works almost without pressure losses.
