Catalytic Converter Ceramic Beads
Other vehicles use a monolithic converter a ceramic honeycomb coated with catalyst.
Catalytic converter ceramic beads. For example when these devices are used in automotives the core is usually a ceramic monolith with a honeycomb structure. This catalyst aids the reaction of the co and hydrocarbons with the remaining oxygen in the exhaust gas. The catalytic converter is made up of several materials. In the catalytic converter there are two different types of catalyst at work a reduction catalyst and an oxidation catalyst both types consist of a ceramic structure coated with a metal catalyst usually platinum rhodium and or palladium the idea is to create a structure that exposes the maximum surface area of catalyst to the exhaust stream while also minimizing the amount of catalyst.
There are many passages for the exhaust gases to flow to allow for the maximum amount of surface area for the hot gases to pass. Its function is to assist in the chemical reactions that are involved in reducing the emission levels. The inside of the catalytic converter is a honeycomb set of passageways or small ceramic beads coated with catalysts. The honeycomb structure or beads are coated with palladium platinum and rhodium.
A chemical reaction takes place to make the pollutants less harmful. It is a thin coating of precious metals platinum palladium and rhodium applied to the surface of the substrate the inner lining of the converter. They use ceramic coded beads and various precious metals the catalysts to convert pollutants like unburned gas and nitrogen oxide into harmless gases. Ceramic honeycomb catalyst structure the oxidation catalyst is the second stage of the catalytic converter.
The catalytic converter s construction is as follows. Platinum pt palladium pd and rhodium rh coat a ceramic honeycomb or ceramic beads. When manufactured in large quantities ceramic cores can be inexpensive. What is the catalyst of a catalytic converter.
Pellet catalytic converters use little ceramic beads coated with catalyst. Exhaust gases and the role of the catalytic converter. The pellets can disintegrate because of overheating and plug the unit. The inside of a converter contains a honeycomb structure made out of ceramic or ceramic beads.
It reduces the unburned hydrocarbons and carbon monoxide by burning oxidizing them over a platinum and palladium catalyst. The catalyst core or substrate varies according to the vehicle. Prior to the mid 1980s the catalyst material was deposited on a packed bed of alumina pellets in early gm applications metallic foil monoliths made of kanthal. The catalyst support or substrate for automotive catalytic converters the core is usually a ceramic monolith that has a honeycomb structure commonly square not hexagonal.