Where Is the Platinum in a Catalytic Converter?

Catalytic converters use precious metals to reduce harmful emissions.

The catalytic converter is a major emission-control component on modern automobiles. It utilizes precious metals, such as platinum, to create chemical reactions that convert pollutants into nontoxic materials.

Description

Exhaust gases enter the catalytic converter and pass through a honeycomb structure of ceramic and platinum. As the exhaust passes through the honeycomb, the platinum catalyzes a reaction that changes the harmful exhaust fumes into safe compounds.

Location

The catalytic converter is located after the vehicle's exhaust manifold. The platinum honeycomb inside the converter stretches through much of the catalytic converter body. Some converters use small pellets of a platinum compound instead of a honeycomb.

Significance

Platinum is very important to catalytic converter operation. Even though platinum is the catalyst, meaning it makes the chemical reaction possible, only a few grams will be found inside the honeycomb of a catalytic converter.

References

• All Catalytic Converters.com: What Does A Catalytic Converter Do?
• 2 Car Pros: How a Catalytic Converter Works