Abstract: 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.

Abstract: 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.

Abstract: A tube assembly for cooling an incoming fluid stream and destroying pollutants contained therein comprises a tube with a catalytic coating on its inner wall and an arrangement for disrupting laminar flow of the fluid stream as it transits the tube, thereby causing turbulence which increases mass transfer between the gas phase and the catalyst-coated inner surfaces. One embodiment comprises an axially inserted turbulator that is segmented by one or more axially directed cuts, each segment rotated by an offset angle with respect to an adjacent segment, and optionally coated with the catalytic coating. Another embodiment comprises sets of opposed dimples, each set separated from its adjacent set by a linear distance and an axial angle. Such tube assemblies may be advantageously employed in aircraft environmental control systems for conditioning cabin air.

Abstract: 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.

Abstract: A tube assembly for cooling an incoming fluid stream and destroying pollutants contained therein comprises a tube with a catalytic coating on its inner wall and an arrangement for disrupting laminar flow of the fluid stream as it transits the tube, thereby causing turbulence which increases mass transfer between the gas phase and the catalyst-coated inner surfaces. One embodiment comprises an axially inserted turbulator that is segmented by one or more axially directed cuts, each segment rotated by an offset angle with respect to an adjacent segment, and optionally coated with the catalytic coating. Another embodiment comprises sets of opposed dimples, each set separated from its adjacent set by a linear distance and an axial angle. Such tube assemblies may be advantageously employed in aircraft environmental control systems for conditioning cabin air.

Abstract: 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.

Abstract: A method of coating a catalyst layer on a metallic substrate includes preparing a metal oxide and binder slurry to coat onto a metal surface and forming a catalytic layer over the slurry coated surface. The slurry may be made from a binder containing, for example, fully dissolved alumina in the presence of excess nitric acid. The binder may then be mixed with a metal oxide mixture to form the metal oxide-binder slurry. The metal oxide mixture may contain aluminum oxide or partially hydrated aluminum oxide. The metal oxide-binder slurry can be used to coat the surfaces of a variety of metals such as aluminum, titanium, nickel, cobalt, chromium, iron, copper, etc., or their alloys that include brass, as well as stainless steel with or without Al as a component.