
The three-way catalytic converter is the most important external purification device installed in the automobile exhaust system, which can transform the harmful gases such as CO, HC and NOx discharged from the automobile exhaust into harmless carbon dioxide, water and nitrogen through oxidation and reduction. When the high-temperature automobile exhaust passes through the purification device, the purifying agent in the three-way catalytic converter will enhance the activity of the three gases CO, HC and NOx, and promote it to undergo a certain oxidation-reduction chemical reaction, in which CO oxidizes to become colorless and non-toxic carbon dioxide gas at high temperature; HC compounds oxidize to water (H2O) and carbon dioxide at high temperatures; NOx is reduced to nitrogen and oxygen. Three harmful gases become harmless gases, so that car exhaust can be purified.



Why replace the three-way catalytic converter?
1. The temperature is too high
At room temperature, the three-way catalytic converter does not have the catalytic ability, the catalyst must be heated to a certain temperature to have the ability of oxidation or reduction, usually the catalytic converter ignition temperature is 250-350 ° C, the normal working temperature is generally 400-800 ° C. When the catalytic converter works, the higher the amount of self, the higher the oxidation temperature, when the temperature exceeds 1000 ° C, the catalyst of its inner coating will be sintered and necrotic, and it is also easy to occur vehicle spontaneous combustion accidents. Therefore, we must pay attention to the control of various factors that cause the exhaust temperature to rise, such as too late ignition time or ignition sequence disorder, fire break, etc., which will make the unburned mixture into the catalytic reactor, resulting in too high exhaust temperature, affecting the efficiency of the catalytic converter.
2. Chronic poisoning
Catalyst is very sensitive to sulfur, lead, phosphorus, zinc and other elements, sulfur and lead from gasoline, phosphorus and zinc from lubricating oil, these four substances and their combustion in the engine after the formation of oxide particles are easy to be adsorbed on the surface of the catalyst, so that the catalyst can not contact with the exhaust gas, thus losing the catalytic effect, the so-called "poisoning" phenomenon.
3. Surface area carbon
When the car works at a low temperature for a long time, the three-way catalytic converter cannot be started, the carbon smoke from the engine will adhere to the surface of the catalyst, resulting in no contact with CO and HC, and in the long run, the pores of the carrier will be blocked, affecting its conversion efficiency.
4. Exhaust deterioration
The catalytic converter has a certain limit on the conversion capacity of pollutants, so the original exhaust must be minimized by in-machine purification technology. If the concentration and total amount of the components of the discharged waste gas pollutants are too large, such as the mixture is too strong, it will affect the catalytic conversion ability of the catalytic converter and reduce its conversion efficiency. In addition, due to the large amount of HC and CO in the exhaust gas into the catalytic reactor, there will be excessive oxidation reaction in it, and a large amount of heat generated by the oxidation reaction will make the catalytic reactor too high temperature and damage.


The carrier part of the three-way catalytic converter is a porous ceramic material installed in a special exhaust pipe. It is called a carrier because it does not participate in the catalytic reaction itself, but is covered with a layer of platinum, rhodium, palladium and other precious metals. It can turn HC and CO in the exhaust gas into water and CO2, while decomposing NOx into nitrogen and oxygen. HC and CO are toxic gases, and excessive inhalation will lead to death, while NOx will directly lead to the occurrence of photochemical smog.
Material | Stainless Steel Metal |
Name | Catalytic Converter |
Size | can be customized |
MOQ | 50 |
Packing | Bubble Bag + Strong Carton Box |
Purpose | Used to purifying or filtering exhaust gases from spark ignition or compression engines |
Application | Widely used for Toyota, Honda, Buick, Audi, Volkswagen, Hyundai, Suzuki, Ford, Lada, Porsche, Land Rover, Mercedes-Benz, BMW, Fiat and so on |
Warranty Service | 1years |





