Where is the three-way catalytic converter located in a car engine?
1 Answers
The three-way catalytic converter in a car engine is located in the vehicle's exhaust system and resembles a canteen in shape. It is an important external purification device. The three-way catalytic converter consists of four parts: the shell, damping layer, carrier, and catalyst coating. This type of converter is called 'three-way' because it can simultaneously convert the three main harmful substances in exhaust gases into harmless substances. The working principle of the three-way catalytic converter is that when high-temperature exhaust gases pass through the purification device, the purifying agents in the converter enhance the activity of CO, HC, and NOx gases, promoting specific oxidation-reduction chemical reactions. CO is oxidized at high temperatures into colorless, non-toxic carbon dioxide gas; HC compounds are oxidized into water and carbon dioxide at high temperatures; and NOx is reduced into nitrogen and oxygen, thereby purifying the vehicle's exhaust gases.