Rear Catalytic Converter?

Rear catalytic converters reduce harmful emissions from vehicles by chemically converting pollutants into less toxic substances. They are typically positioned in the exhaust system after the front catalytic converters, and their primary role is to further clean the exhaust gases before they exit the vehicle.

The rear catalytic converter consists of a ceramic or metal substrate coated with a catalyst made from precious metals such as platinum, rhodium, and palladium. As the exhaust gases pass through the converter, they come into contact with the catalyst, causing a chemical reaction that changes the composition of the emissions.

Here are some specific reactions that occur in a rear catalytic converter:

* Carbon monoxide (CO) is oxidized to produce carbon dioxide (CO2):

```

2 CO + O2 -> 2 CO2

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* Hydrocarbons (HC) are oxidized to produce carbon dioxide and water (H2O):

```

CnH2n+2 + (n + 1)O2 -> n CO2 + (n + 1) H2O

```

* Nitrogen oxides (NOx) are reduced to produce nitrogen (N2) and oxygen (O2):

```

2 NOx + 2 CO -> N2 + 2 CO2

```

The rear catalytic converter plays an essential role in reducing the environmental impact of vehicles. It works in conjunction with the front catalytic converter and other emission control systems to minimize the emission of harmful pollutants.