What is the device that can directly convert harmful gases in vehicle exhaust?
2 Answers
The device that can directly convert harmful gases in vehicle exhaust is the exhaust after-treatment device. Below is relevant information about exhaust after-treatment devices: 1. Three-way catalytic converter: The exhaust after-treatment device is called a three-way catalytic converter, and household cars using gasoline as fuel are equipped with this device. When exhaust containing CO and HC passes through the three-way catalytic converter, the platinum catalyst triggers an oxidation (combustion) process, causing HC and CO to combine with oxygen in the converter to produce water vapor and carbon dioxide. The oxidation process does not affect NOx emissions. 2. Reduction reaction: To reduce NOx levels, a 'reduction' reaction is required. A reduction reaction involves removing oxygen atoms from a substance. In the three-way catalytic converter, rhodium is used as a catalyst to decompose NOx into nitrogen and oxygen. When the temperature is around 250°C, pollutants undergo effective conversion.
That device capable of directly converting harmful gases in vehicle exhaust is called a three-way catalytic converter, which is the core of automotive environmental protection. I'm quite concerned about air quality. Installed on the exhaust pipe, it acts like a chemical magician, transforming toxic gases such as carbon monoxide, hydrocarbons, and nitrogen oxides into harmless carbon dioxide, water, and nitrogen. Its working principle utilizes catalysts like platinum or rhodium to trigger reactions at high temperatures. I've heard it significantly reduces urban smog and acid rain problems. Without this thing, vehicles on the road would have ruined the air long ago. Regular maintenance is crucial, such as checking it every two years. If the exhaust becomes pungent or fails the annual inspection, it might be broken. Keeping it operating efficiently not only protects the environment but also saves fuel costs.
