What are the current methods for treating automobile exhaust?
2 Answers
There are mainly the following methods for treating automobile exhaust: 1. Direct method: First, the carbon particles in diesel engine exhaust are captured by a collector and catalytically converted. The nitrogen oxides in the exhaust are then reduced or directly decomposed in a second catalytic converter using a suitable reducing agent. 2. Indirect method: Simultaneously eliminate carbon particles and nitrogen oxides in the exhaust on a catalytic collector, i.e., use the particulate matter (PM) collected on the filter to reduce (NOx). Here is some additional information: 1. Introduction: Diesel engine exhaust has an extremely complex chemical composition, and the composition of the exhaust varies significantly with engine operating conditions. 2. Types: The emitted pollutants include carbon soot particulate matter (PM), nitrogen oxides (NOx), CO, and hydrocarbons (HC), among others.
The three-way catalytic converter on my car is responsible for treating exhaust gases. The precious metal coating of platinum, palladium, and rhodium inside can convert toxic gases like carbon monoxide and hydrocarbons into carbon dioxide and water. What's particularly interesting is how the oxygen sensor on the exhaust pipe works in tandem, with the computer monitoring combustion in real-time to automatically adjust the air-fuel ratio. Nowadays, vehicles compliant with China VI emission standards are also equipped with a particulate filter to trap PM2.5. Last time during maintenance, the mechanic warned me never to use low-quality gasoline, or the catalytic converter could fail and clog up within just three months.
