3 Way Converter or Catalyst
TWC

Terternary catalyst (TWC), which is widely used in gasoline engine tail gas post-treatment, is named because it can simultaneously treat hydrocarbon (HC), carbon monoxide (CO) and nitrogen oxide (NOx). It is a very effective and widely used gasoline engine tail gas post-treatment technology. Ternary catalyst is generally through the honeycomb ceramic carrier or metal carrier channel, coated with porous activated alumina (γ-Al₂O₃) as the second carrier to increase the wall of the specific surface area; In the alumina coating also need to add a variety of rare earth metal oxides as catalytic agents, as well as precious metals platinum (Pt), palladium (Pd) and rhodium (Rh) and other active catalytic substances