2008 Nissan Teana 2.0 three-way catalytic converter

The engine exhaust contains carbon monoxide (C0), hydrocarbons (HC) and nitrogen oxides (NOx) and other harmful gases, and the Three Way Catalytic Converter is a conversion device that can convert these three harmful gases into harmless substances. The Direct- Fit Three Way Catalytic is installed in the exhaust pipe and resembles a muffler. The outer cylinder is made of double-layer stainless steel plate, the interlayer is equipped with insulation material -- asbestos fiber felt, the steel cylinder is longitudinal with dense honeycomb holes of high temperature resistant ceramic carrier (there are other shapes, such as sphere, polygonal body, mesh partition, etc.), the surface is spray with a very thin platinum, rhodium, palladium active catalytic layer as a cleaning agent (also known as catalyst).

2. the working principle

When the engine exhaust gas is discharged through the exhaust pipe, the activity of C0, HC and NOx is enhanced due to the catalysis of the purifier in the ternary Exhaust Pipe Catalytic Converter‘’ so as to carry out the oxidation-reduction reaction, among which, C0 is oxidized to colorless, non-toxic C02 at high temperatures,HC compounds are oxidized to H20 and C02 at high temperatures, and NOx is reduced to N2 (nitrogen) and 02 (oxygen), so that the exhaust gas emissions of the engine are purified