threeYuanThe catalytic converter is installed in the exhaust system of an automobile as an external purification device. It is also an important environmental protection device for automobiles. The three-way catalytic converter enhances the activity of the three gases CO, HC and NOx in the exhaust gas of the car through the purifier to promote the harmful gas discharged from the engine to carry out a certain oxidation-reduction reaction, and finally turn it into a harmless gas. Because the three-way catalytic converter contains precious metals, it is relatively expensive.
What metal material does the three-way catalytic converter contain?
The three-way catalytic converter is divided into four parts, consisting of a shell, a damping layer, a carrier and a catalyst coating. The main component of the three-way catalytic converter is the carrier, which is installed in the shell and is a porous ceramic material. However, it does not participate in the catalytic reaction, but is covered with a layer of catalyst coating. They are Pt (platinum), Rare metals such as Rh (rhodium) and Pd (palladium), and rare earth metals including Ce (cerium) and La (lanthanum).
It is precisely because it contains precious metals that the three-way catalytic converter is so valuable, and there are not many manufacturers that can produce high-quality three-way catalytic converters, so its price is raised to a certain extent. Once the three-way catalytic converter is damaged, it can only be replaced. It is recommended that after replacing the new three-way catalytic converter, the car owner can bring the old three-way catalytic converter with it and sell it to a person who specializes in recycling.
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