What Is a Catalytic Converter and What Does It Do?

This article is an informational piece for those wondering what a catalytic converter is, what its function is inside the vehicle, and what a catalytic converter is for.

What Is a Catalytic Converter?

A catalytic converter is a component in the vehicle’s exhaust system that purifies harmful components (especially nitrogen oxides and carbon monoxide) contained in the vehicle’s exhaust gases by converting them. A catalytic substance inside the catalytic converter is used to carry out this conversion.

Catalytic converters don’t affect the car’s operation; they only purify the harmful waste gases produced while the car runs. The use of catalytic converters has become mandatory in various countries because these parts reduce environmental pollution and have a positive effect on human health.

Harmful Gas Conversion

The catalytic converter uses chemical reactions to make harmful exhaust gases like CO, HC, and NOx less harmful.

Use of Platinum and Palladium

The catalyst layer inside the converter is generally made from precious metals such as platinum, palladium, and rhodium.

Emission Standards

Catalytic converters are a mandatory component for vehicles to meet Euro emission standards.

What Is a Catalytic Converter For

Catalytic converters pass through the exhaust gases produced while the car runs, and convert the harmful components using the catalytic substances inside them.

Catalytic converters are made in two basic types: oxidation catalytic converters and reduction catalytic converters.

Oxidation catalytic converters react carbon monoxide (CO) and hydrocarbons (CxHy) with oxygen, converting them into CO2 and water vapor.
Reduction catalytic converters, on the other hand, react nitrogen oxides (NOx) with another compound, such as hydrogen or ethylene, converting them into nitrogen (N2) and water.

This way, catalytic converters purify the vehicle’s exhaust gases of nitrogen oxides (NOx), carbon monoxide (CO), and other harmful components, reducing environmental pollution.

Using catalytic converters is also important for human health, because nitrogen oxides can lead to respiratory problems.

How Does a Catalytic Converter Work?

Special filters inside the converter cause gases harmful to the environment and health to undergo a chemical reaction. This way, these harmful gases are converted into harmless carbon dioxide (CO2), water (H2O), and nitrogen (N2). The ECU (Electronic Control Unit) checks whether the converter is running efficiently. Oxygen sensors are used for this. This is basically how a catalytic converter’s operating system works.

In conclusion, catalytic converters have been made mandatory for vehicles produced by car manufacturers, for their role as an important part that reduces environmental pollution and protects human health.

It first reacts with the carbon monoxide produced by the combustion of gasoline. It then also reacts with the hydrocarbons formed by unburned fuel and other nitrogen oxide emissions. This way, the catalytic converter converts these gases into less harmful byproducts. These are carbon dioxide, water vapor, and nitrogen emissions.

what a catalytic converter is for. internal structure of a catalytic converter — A catalytic converter and its internal structure

In this article, we tried to explain what a catalytic converter in the vehicle exhaust system is, how many types of catalytic converters there are, and what a catalytic converter is for. Hope to see you in new articles.

Related Questions

The converter changes the composition of the exhaust gas, but doesn’t directly interfere with the engine’s operating principle. So under normal conditions, it doesn’t affect engine performance, only the harmfulness of the gases coming out of the exhaust.

These metals have the property of speeding up (catalyzing) the chemical reaction that converts harmful gases into less harmful compounds. Precious metals are preferred because there are no other cheap alternatives with this property.