The role of the three-way catalytic converter in the car muffler

The three-way catalytic converter is the most important external purification device installed in the automobile exhaust system. It can convert harmful gases such as CO, HC and NOx emitted by the automobile exhaust into harmless carbon dioxide, water and NOx through oxidation and reduction. Nitrogen. Because this catalytic converter can simultaneously convert the main harmful substances in the exhaust gas into harmless substances. As environmental protection requirements become increasingly stringent, more and more cars are equipped with exhaust gas catalytic converters and oxygen sensor devices. It is installed in the engine exhaust pipe and converts carbon dioxide and nitrogen through an oxidation-reduction reaction, so it is also called a three-way (effective) catalytic converter.
The working principle of the three-way catalytic converter is: when high-temperature automobile exhaust passes through the purification device, the purifier in the three-way catalytic converter will enhance the activity of the three gases CO, HC and NOx, prompting them to undergo certain oxidation-reduction chemical reactions. , where CO is oxidized at high temperatures into colorless, non-toxic carbon dioxide gas; HC compounds are oxidized at high temperatures into water (H20) and carbon dioxide; NOx is reduced into nitrogen and oxygen. Three harmful gases are turned into harmless gases, so that car exhaust can be purified.