Catalytic converters installed in commercial electric cooking appliances are usually based on metallic honeycombs, which give the best performance in a compact space, without causing too much pressure drop. However, ceramic honeycombs are sometimes used as well, and these may be advantageous if they are located in the microwave zone.
One of the key requirements of a catalytic converter designed for a cooking appliance in which the air recirculates is that the coating adhesion must be excellent, otherwise the coating may fall off and contaminate foodstuffs during cooking. It is also essential that the catalytic converter materials are resistant to corrosion.
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